./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.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_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/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 26441863cbddcb0f41ea7f2e43c89533e1f12930 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:23:47,275 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:23:47,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:23:47,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:23:47,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:23:47,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:23:47,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:23:47,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:23:47,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:23:47,384 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:23:47,385 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:23:47,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:23:47,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:23:47,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:23:47,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:23:47,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:23:47,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:23:47,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:23:47,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:23:47,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:23:47,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:23:47,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:23:47,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:23:47,428 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:23:47,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:23:47,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:23:47,445 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:23:47,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:23:47,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:23:47,451 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:23:47,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:23:47,454 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:23:47,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:23:47,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:23:47,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:23:47,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:23:47,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:23:47,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:23:47,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:23:47,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:23:47,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:23:47,467 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 02:23:47,522 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:23:47,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:23:47,523 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:23:47,524 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:23:47,524 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:23:47,524 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:23:47,525 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:23:47,525 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:23:47,525 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:23:47,525 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:23:47,527 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:23:47,527 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:23:47,527 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:23:47,528 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:23:47,528 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:23:47,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:23:47,529 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:23:47,529 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:23:47,529 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:23:47,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:23:47,530 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:23:47,530 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:23:47,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:23:47,531 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:23:47,531 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:23:47,531 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:23:47,532 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:23:47,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:23:47,532 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:23:47,534 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:23:47,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:23:47,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:23:47,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:23:47,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:23:47,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:23:47,536 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:23:47,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:23:47,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:23:47,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:23:47,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:23:47,537 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_1e0f7606-9e9f-4f20-8a85-469f3f028330/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 26441863cbddcb0f41ea7f2e43c89533e1f12930 [2020-11-30 02:23:47,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:23:47,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:23:48,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:23:48,003 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:23:48,004 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:23:48,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2020-11-30 02:23:48,087 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/data/c1dfbc967/f806d6320d334653b62bcdfd17a75dda/FLAG33564a795 [2020-11-30 02:23:48,756 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:23:48,756 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2020-11-30 02:23:48,773 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/data/c1dfbc967/f806d6320d334653b62bcdfd17a75dda/FLAG33564a795 [2020-11-30 02:23:49,093 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/data/c1dfbc967/f806d6320d334653b62bcdfd17a75dda [2020-11-30 02:23:49,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:23:49,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:23:49,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:23:49,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:23:49,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:23:49,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:23:49" (1/1) ... [2020-11-30 02:23:49,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ffff03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:23:49, skipping insertion in model container [2020-11-30 02:23:49,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:23:49" (1/1) ... [2020-11-30 02:23:49,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:23:49,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:23:49,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:23:49,456 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:23:49,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:23:49,530 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:23:49,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:23:49 WrapperNode [2020-11-30 02:23:49,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:23:49,532 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:23:49,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:23:49,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:23:49,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:23:49" (1/1) ... [2020-11-30 02:23:49,564 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:23:49" (1/1) ... [2020-11-30 02:23:49,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:23:49,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:23:49,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:23:49,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:23:49,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:23:49" (1/1) ... [2020-11-30 02:23:49,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:23:49" (1/1) ... [2020-11-30 02:23:49,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:23:49" (1/1) ... [2020-11-30 02:23:49,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:23:49" (1/1) ... [2020-11-30 02:23:49,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:23:49" (1/1) ... [2020-11-30 02:23:49,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:23:49" (1/1) ... [2020-11-30 02:23:49,641 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:23:49" (1/1) ... [2020-11-30 02:23:49,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:23:49,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:23:49,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:23:49,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:23:49,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:23:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/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 [2020-11-30 02:23:49,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 02:23:49,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:23:49,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:23:49,749 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:23:50,456 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:23:50,456 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-11-30 02:23:50,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:23:50 BoogieIcfgContainer [2020-11-30 02:23:50,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:23:50,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:23:50,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:23:50,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:23:50,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:23:49" (1/3) ... [2020-11-30 02:23:50,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a09be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:23:50, skipping insertion in model container [2020-11-30 02:23:50,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:23:49" (2/3) ... [2020-11-30 02:23:50,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9a09be4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:23:50, skipping insertion in model container [2020-11-30 02:23:50,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:23:50" (3/3) ... [2020-11-30 02:23:50,468 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.c [2020-11-30 02:23:50,482 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:23:50,487 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-11-30 02:23:50,499 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-11-30 02:23:50,539 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:23:50,539 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:23:50,539 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:23:50,539 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:23:50,540 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:23:50,540 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:23:50,540 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:23:50,540 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:23:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-11-30 02:23:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:23:50,561 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:23:50,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:23:50,563 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:23:50,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:23:50,570 INFO L82 PathProgramCache]: Analyzing trace with hash 165250771, now seen corresponding path program 1 times [2020-11-30 02:23:50,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:23:50,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537755542] [2020-11-30 02:23:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:23:50,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:23:50,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537755542] [2020-11-30 02:23:50,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:23:50,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:23:50,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449802707] [2020-11-30 02:23:50,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 02:23:50,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:23:50,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 02:23:50,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:23:50,829 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-11-30 02:23:50,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:23:50,864 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2020-11-30 02:23:50,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:23:50,866 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-30 02:23:50,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:23:50,884 INFO L225 Difference]: With dead ends: 65 [2020-11-30 02:23:50,885 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 02:23:50,890 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 [2020-11-30 02:23:50,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 02:23:50,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-11-30 02:23:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 02:23:50,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-11-30 02:23:50,929 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 5 [2020-11-30 02:23:50,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:23:50,929 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-11-30 02:23:50,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 02:23:50,930 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-11-30 02:23:50,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 02:23:50,930 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:23:50,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 02:23:50,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:23:50,931 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:23:50,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:23:50,932 INFO L82 PathProgramCache]: Analyzing trace with hash 735362312, now seen corresponding path program 1 times [2020-11-30 02:23:50,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:23:50,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057017563] [2020-11-30 02:23:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:23:50,965 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:23:50,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702571107] [2020-11-30 02:23:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/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 [2020-11-30 02:23:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:51,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:23:51,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:23:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:23:51,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:23:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:23:51,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057017563] [2020-11-30 02:23:51,199 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:23:51,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702571107] [2020-11-30 02:23:51,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:23:51,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 02:23:51,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046534163] [2020-11-30 02:23:51,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:23:51,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:23:51,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:23:51,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:23:51,203 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2020-11-30 02:23:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:23:51,270 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-11-30 02:23:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:23:51,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-30 02:23:51,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:23:51,272 INFO L225 Difference]: With dead ends: 43 [2020-11-30 02:23:51,273 INFO L226 Difference]: Without dead ends: 39 [2020-11-30 02:23:51,274 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 [2020-11-30 02:23:51,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-30 02:23:51,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-11-30 02:23:51,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 02:23:51,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-11-30 02:23:51,284 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2020-11-30 02:23:51,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:23:51,284 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-11-30 02:23:51,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:23:51,284 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-11-30 02:23:51,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:23:51,285 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:23:51,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:23:51,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 02:23:51,512 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:23:51,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:23:51,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1320528433, now seen corresponding path program 1 times [2020-11-30 02:23:51,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:23:51,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697127626] [2020-11-30 02:23:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:23:51,532 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:23:51,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455619952] [2020-11-30 02:23:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/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 [2020-11-30 02:23:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:51,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:23:51,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:23:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:23:51,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:23:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:23:51,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697127626] [2020-11-30 02:23:51,646 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:23:51,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455619952] [2020-11-30 02:23:51,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:23:51,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 02:23:51,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419758846] [2020-11-30 02:23:51,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:23:51,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:23:51,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:23:51,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:23:51,649 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 3 states. [2020-11-30 02:23:51,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:23:51,709 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-11-30 02:23:51,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:23:51,711 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-30 02:23:51,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:23:51,712 INFO L225 Difference]: With dead ends: 61 [2020-11-30 02:23:51,713 INFO L226 Difference]: Without dead ends: 57 [2020-11-30 02:23:51,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:23:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-30 02:23:51,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2020-11-30 02:23:51,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 02:23:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-11-30 02:23:51,729 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 7 [2020-11-30 02:23:51,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:23:51,730 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-11-30 02:23:51,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:23:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-11-30 02:23:51,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:23:51,731 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:23:51,732 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:23:51,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:23:51,948 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:23:51,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:23:51,949 INFO L82 PathProgramCache]: Analyzing trace with hash 780891877, now seen corresponding path program 1 times [2020-11-30 02:23:51,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:23:51,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817191540] [2020-11-30 02:23:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:23:51,972 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:23:51,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103269405] [2020-11-30 02:23:51,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/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 [2020-11-30 02:23:52,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:52,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 02:23:52,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:23:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:23:52,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:23:52,114 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:23:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:23:52,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817191540] [2020-11-30 02:23:52,135 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:23:52,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103269405] [2020-11-30 02:23:52,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:23:52,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-30 02:23:52,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366884955] [2020-11-30 02:23:52,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:23:52,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:23:52,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:23:52,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:23:52,137 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 5 states. [2020-11-30 02:23:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:23:52,239 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-11-30 02:23:52,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:23:52,242 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 02:23:52,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:23:52,243 INFO L225 Difference]: With dead ends: 57 [2020-11-30 02:23:52,243 INFO L226 Difference]: Without dead ends: 55 [2020-11-30 02:23:52,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:23:52,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-30 02:23:52,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-11-30 02:23:52,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-30 02:23:52,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-11-30 02:23:52,256 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 11 [2020-11-30 02:23:52,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:23:52,257 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-11-30 02:23:52,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:23:52,257 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-11-30 02:23:52,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 02:23:52,258 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:23:52,258 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:23:52,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:23:52,472 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:23:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:23:52,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1361720655, now seen corresponding path program 1 times [2020-11-30 02:23:52,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:23:52,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780988985] [2020-11-30 02:23:52,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:23:52,495 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:23:52,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428714593] [2020-11-30 02:23:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/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 [2020-11-30 02:23:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:52,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:23:52,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:23:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:23:52,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:23:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:23:52,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780988985] [2020-11-30 02:23:52,656 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:23:52,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428714593] [2020-11-30 02:23:52,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:23:52,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-30 02:23:52,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208644663] [2020-11-30 02:23:52,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 02:23:52,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:23:52,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 02:23:52,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:23:52,658 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 8 states. [2020-11-30 02:23:52,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:23:52,748 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2020-11-30 02:23:52,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:23:52,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-30 02:23:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:23:52,755 INFO L225 Difference]: With dead ends: 111 [2020-11-30 02:23:52,755 INFO L226 Difference]: Without dead ends: 81 [2020-11-30 02:23:52,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-11-30 02:23:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-11-30 02:23:52,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2020-11-30 02:23:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-30 02:23:52,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-11-30 02:23:52,784 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 12 [2020-11-30 02:23:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:23:52,784 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-11-30 02:23:52,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 02:23:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-11-30 02:23:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:23:52,791 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:23:52,791 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:23:53,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:23:53,004 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:23:53,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:23:53,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1129600833, now seen corresponding path program 1 times [2020-11-30 02:23:53,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:23:53,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049427897] [2020-11-30 02:23:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:23:53,021 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:23:53,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956128093] [2020-11-30 02:23:53,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/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 [2020-11-30 02:23:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:23:53,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:23:53,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:23:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:23:53,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:23:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:23:53,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049427897] [2020-11-30 02:23:53,211 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:23:53,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956128093] [2020-11-30 02:23:53,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [396914655] [2020-11-30 02:23:53,237 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-11-30 02:23:53,237 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:23:53,243 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:23:53,250 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:23:53,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:23:53,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:23:54,324 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:23:54,641 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-30 02:23:54,972 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-11-30 02:23:56,237 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 139 DAG size of output: 101 [2020-11-30 02:23:57,195 WARN L193 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 91 [2020-11-30 02:23:58,060 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 94 [2020-11-30 02:23:58,798 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 91 [2020-11-30 02:23:59,368 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 77 [2020-11-30 02:23:59,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:23:59,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 5] total 16 [2020-11-30 02:23:59,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376105925] [2020-11-30 02:23:59,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 02:23:59,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:23:59,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 02:23:59,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:23:59,372 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 9 states. [2020-11-30 02:23:59,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:23:59,785 INFO L93 Difference]: Finished difference Result 108 states and 137 transitions. [2020-11-30 02:23:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 02:23:59,786 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-11-30 02:23:59,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:23:59,788 INFO L225 Difference]: With dead ends: 108 [2020-11-30 02:23:59,788 INFO L226 Difference]: Without dead ends: 78 [2020-11-30 02:23:59,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:23:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-30 02:23:59,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2020-11-30 02:23:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-30 02:23:59,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2020-11-30 02:23:59,803 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 13 [2020-11-30 02:23:59,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:23:59,804 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2020-11-30 02:23:59,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 02:23:59,804 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2020-11-30 02:23:59,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:23:59,805 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:23:59,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:24:00,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 02:24:00,020 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:24:00,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:00,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1181995256, now seen corresponding path program 1 times [2020-11-30 02:24:00,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:00,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537038593] [2020-11-30 02:24:00,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:00,033 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:24:00,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510255078] [2020-11-30 02:24:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/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 [2020-11-30 02:24:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:00,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 02:24:00,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:00,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:24:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:00,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537038593] [2020-11-30 02:24:00,150 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:24:00,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510255078] [2020-11-30 02:24:00,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:24:00,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-11-30 02:24:00,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990167694] [2020-11-30 02:24:00,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:24:00,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:00,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:24:00,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:24:00,153 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand 5 states. [2020-11-30 02:24:00,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:00,255 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2020-11-30 02:24:00,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:24:00,260 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-30 02:24:00,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:00,261 INFO L225 Difference]: With dead ends: 79 [2020-11-30 02:24:00,262 INFO L226 Difference]: Without dead ends: 77 [2020-11-30 02:24:00,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:24:00,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-30 02:24:00,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2020-11-30 02:24:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-30 02:24:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2020-11-30 02:24:00,291 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 13 [2020-11-30 02:24:00,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:00,292 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2020-11-30 02:24:00,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:24:00,292 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2020-11-30 02:24:00,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:24:00,294 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:00,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:24:00,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:00,520 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:24:00,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:00,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2025886741, now seen corresponding path program 1 times [2020-11-30 02:24:00,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:00,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689818049] [2020-11-30 02:24:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:00,534 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:24:00,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707982403] [2020-11-30 02:24:00,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/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 [2020-11-30 02:24:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:00,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 02:24:00,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:00,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:24:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:00,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689818049] [2020-11-30 02:24:00,718 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:24:00,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707982403] [2020-11-30 02:24:00,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:24:00,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 02:24:00,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961686318] [2020-11-30 02:24:00,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:24:00,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:00,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:24:00,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:24:00,720 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand 6 states. [2020-11-30 02:24:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:00,916 INFO L93 Difference]: Finished difference Result 113 states and 135 transitions. [2020-11-30 02:24:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 02:24:00,917 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-30 02:24:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:00,918 INFO L225 Difference]: With dead ends: 113 [2020-11-30 02:24:00,918 INFO L226 Difference]: Without dead ends: 111 [2020-11-30 02:24:00,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:24:00,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-30 02:24:00,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2020-11-30 02:24:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-30 02:24:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2020-11-30 02:24:00,947 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 15 [2020-11-30 02:24:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:00,948 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2020-11-30 02:24:00,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:24:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2020-11-30 02:24:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 02:24:00,949 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:00,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:24:01,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:01,176 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:24:01,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:01,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1256784498, now seen corresponding path program 1 times [2020-11-30 02:24:01,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:01,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071021119] [2020-11-30 02:24:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:01,205 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:24:01,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168318306] [2020-11-30 02:24:01,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/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 [2020-11-30 02:24:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:01,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 02:24:01,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:01,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:24:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:01,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071021119] [2020-11-30 02:24:01,373 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:24:01,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168318306] [2020-11-30 02:24:01,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:24:01,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 02:24:01,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904800320] [2020-11-30 02:24:01,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:24:01,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:01,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:24:01,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:24:01,375 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand 6 states. [2020-11-30 02:24:05,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:05,953 INFO L93 Difference]: Finished difference Result 221 states and 286 transitions. [2020-11-30 02:24:05,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 02:24:05,956 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-11-30 02:24:05,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:05,958 INFO L225 Difference]: With dead ends: 221 [2020-11-30 02:24:05,958 INFO L226 Difference]: Without dead ends: 219 [2020-11-30 02:24:05,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-11-30 02:24:05,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-11-30 02:24:06,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 140. [2020-11-30 02:24:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-30 02:24:06,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2020-11-30 02:24:06,007 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 178 transitions. Word has length 17 [2020-11-30 02:24:06,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:06,013 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 178 transitions. [2020-11-30 02:24:06,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:24:06,013 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 178 transitions. [2020-11-30 02:24:06,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 02:24:06,021 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:06,022 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:24:06,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-30 02:24:06,236 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:24:06,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:06,237 INFO L82 PathProgramCache]: Analyzing trace with hash -292141682, now seen corresponding path program 1 times [2020-11-30 02:24:06,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:06,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011408930] [2020-11-30 02:24:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:06,253 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:24:06,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [248827171] [2020-11-30 02:24:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:06,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 02:24:06,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:06,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:24:06,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:06,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011408930] [2020-11-30 02:24:06,435 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:24:06,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248827171] [2020-11-30 02:24:06,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525659618] [2020-11-30 02:24:06,438 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-11-30 02:24:06,438 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:24:06,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:24:06,439 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:24:06,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:24:06,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:24:07,137 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:24:07,456 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-11-30 02:24:07,870 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-11-30 02:24:09,217 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 139 DAG size of output: 98 [2020-11-30 02:24:10,409 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 137 DAG size of output: 91 [2020-11-30 02:24:11,598 WARN L193 SmtUtils]: Spent 986.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 94 [2020-11-30 02:24:12,979 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 139 DAG size of output: 95 [2020-11-30 02:24:13,946 WARN L193 SmtUtils]: Spent 766.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 81 [2020-11-30 02:24:15,534 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 144 DAG size of output: 98 [2020-11-30 02:24:16,918 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 147 DAG size of output: 103 [2020-11-30 02:24:18,724 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 160 DAG size of output: 103 [2020-11-30 02:24:18,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:24:18,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4] total 16 [2020-11-30 02:24:18,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315836792] [2020-11-30 02:24:18,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 02:24:18,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:18,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 02:24:18,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:24:18,732 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand 12 states. [2020-11-30 02:24:19,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:19,570 INFO L93 Difference]: Finished difference Result 248 states and 320 transitions. [2020-11-30 02:24:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:24:19,580 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-11-30 02:24:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:19,582 INFO L225 Difference]: With dead ends: 248 [2020-11-30 02:24:19,582 INFO L226 Difference]: Without dead ends: 151 [2020-11-30 02:24:19,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:24:19,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-11-30 02:24:19,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 145. [2020-11-30 02:24:19,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-30 02:24:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 182 transitions. [2020-11-30 02:24:19,611 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 182 transitions. Word has length 18 [2020-11-30 02:24:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:19,611 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 182 transitions. [2020-11-30 02:24:19,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 02:24:19,611 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 182 transitions. [2020-11-30 02:24:19,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 02:24:19,614 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:19,615 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:24:19,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:19,834 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:24:19,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:19,834 INFO L82 PathProgramCache]: Analyzing trace with hash 316167691, now seen corresponding path program 1 times [2020-11-30 02:24:19,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:19,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473780906] [2020-11-30 02:24:19,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:19,858 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:24:19,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119146957] [2020-11-30 02:24:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:19,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:24:19,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:19,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:24:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:20,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473780906] [2020-11-30 02:24:20,114 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:24:20,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119146957] [2020-11-30 02:24:20,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2082236551] [2020-11-30 02:24:20,117 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2020-11-30 02:24:20,117 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:24:20,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:24:20,118 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:24:20,118 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:24:20,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:24:21,662 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:24:21,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:24:21,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-11-30 02:24:21,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772607591] [2020-11-30 02:24:21,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 02:24:21,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:21,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 02:24:21,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2020-11-30 02:24:21,666 INFO L87 Difference]: Start difference. First operand 145 states and 182 transitions. Second operand 14 states. [2020-11-30 02:24:22,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:22,034 INFO L93 Difference]: Finished difference Result 619 states and 780 transitions. [2020-11-30 02:24:22,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-30 02:24:22,034 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2020-11-30 02:24:22,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:22,040 INFO L225 Difference]: With dead ends: 619 [2020-11-30 02:24:22,040 INFO L226 Difference]: Without dead ends: 615 [2020-11-30 02:24:22,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2020-11-30 02:24:22,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2020-11-30 02:24:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 433. [2020-11-30 02:24:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-11-30 02:24:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 573 transitions. [2020-11-30 02:24:22,095 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 573 transitions. Word has length 27 [2020-11-30 02:24:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:22,097 INFO L481 AbstractCegarLoop]: Abstraction has 433 states and 573 transitions. [2020-11-30 02:24:22,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 02:24:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 573 transitions. [2020-11-30 02:24:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 02:24:22,100 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:22,100 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:24:22,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:22,316 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:24:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:22,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1215100099, now seen corresponding path program 1 times [2020-11-30 02:24:22,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:22,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652702881] [2020-11-30 02:24:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:22,326 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:24:22,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548649142] [2020-11-30 02:24:22,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:22,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:24:22,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:24:22,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:24:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:24:22,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652702881] [2020-11-30 02:24:22,495 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:24:22,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548649142] [2020-11-30 02:24:22,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [58388481] [2020-11-30 02:24:22,497 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-11-30 02:24:22,498 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:24:22,498 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:24:22,498 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:24:22,498 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:24:22,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:24:23,647 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:24:24,270 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 73 [2020-11-30 02:24:24,591 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2020-11-30 02:24:24,911 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-11-30 02:24:26,872 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 136 DAG size of output: 94 [2020-11-30 02:24:28,706 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 135 DAG size of output: 91 [2020-11-30 02:24:30,219 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 138 DAG size of output: 94 [2020-11-30 02:24:32,311 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 137 DAG size of output: 95 [2020-11-30 02:24:33,847 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 138 DAG size of output: 81 [2020-11-30 02:24:34,142 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-11-30 02:24:34,449 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-11-30 02:24:34,906 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-11-30 02:24:35,638 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-11-30 02:24:36,521 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 02:24:37,400 WARN L193 SmtUtils]: Spent 776.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-11-30 02:24:38,220 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-11-30 02:24:39,192 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-11-30 02:24:40,391 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2020-11-30 02:24:40,923 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-11-30 02:24:40,924 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:24:40,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:24:40,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-11-30 02:24:40,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284091188] [2020-11-30 02:24:40,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:24:40,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:40,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:24:40,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2020-11-30 02:24:40,926 INFO L87 Difference]: Start difference. First operand 433 states and 573 transitions. Second operand 7 states. [2020-11-30 02:24:41,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:24:41,269 INFO L93 Difference]: Finished difference Result 449 states and 594 transitions. [2020-11-30 02:24:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:24:41,270 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-11-30 02:24:41,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:24:41,274 INFO L225 Difference]: With dead ends: 449 [2020-11-30 02:24:41,275 INFO L226 Difference]: Without dead ends: 447 [2020-11-30 02:24:41,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2020-11-30 02:24:41,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-11-30 02:24:41,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 444. [2020-11-30 02:24:41,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-11-30 02:24:41,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 581 transitions. [2020-11-30 02:24:41,343 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 581 transitions. Word has length 28 [2020-11-30 02:24:41,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:24:41,344 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 581 transitions. [2020-11-30 02:24:41,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:24:41,344 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 581 transitions. [2020-11-30 02:24:41,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 02:24:41,345 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:24:41,346 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:24:41,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-11-30 02:24:41,560 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:24:41,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:24:41,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1210397070, now seen corresponding path program 1 times [2020-11-30 02:24:41,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:24:41,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091576362] [2020-11-30 02:24:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:24:41,572 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:24:41,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087014364] [2020-11-30 02:24:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:24:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:24:41,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 48 conjunts are in the unsatisfiable core [2020-11-30 02:24:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:24:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:42,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:24:43,377 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-11-30 02:24:44,027 WARN L193 SmtUtils]: Spent 514.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-30 02:24:45,176 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-11-30 02:24:46,443 WARN L193 SmtUtils]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-11-30 02:24:47,043 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-11-30 02:24:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:24:47,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091576362] [2020-11-30 02:24:47,051 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:24:47,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087014364] [2020-11-30 02:24:47,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [885887428] [2020-11-30 02:24:47,055 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2020-11-30 02:24:47,055 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:24:47,055 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:24:47,056 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:24:47,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:24:47,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:24:47,715 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 266 [2020-11-30 02:24:48,904 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:24:48,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:24:48,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2020-11-30 02:24:48,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708322088] [2020-11-30 02:24:48,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 02:24:48,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:24:48,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 02:24:48,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:24:48,909 INFO L87 Difference]: Start difference. First operand 444 states and 581 transitions. Second operand 18 states. [2020-11-30 02:24:50,408 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-11-30 02:24:52,309 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 41 [2020-11-30 02:24:55,650 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 50 [2020-11-30 02:25:03,932 WARN L193 SmtUtils]: Spent 6.75 s on a formula simplification that was a NOOP. DAG size: 53 [2020-11-30 02:25:07,868 WARN L193 SmtUtils]: Spent 3.74 s on a formula simplification that was a NOOP. DAG size: 50 [2020-11-30 02:25:09,531 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-11-30 02:25:14,109 WARN L193 SmtUtils]: Spent 651.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-11-30 02:25:15,148 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-11-30 02:25:20,311 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 41 [2020-11-30 02:25:22,884 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-11-30 02:25:26,758 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 31 [2020-11-30 02:25:28,623 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 44 [2020-11-30 02:25:33,315 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification that was a NOOP. DAG size: 46 [2020-11-30 02:25:42,698 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-11-30 02:25:49,626 WARN L193 SmtUtils]: Spent 3.69 s on a formula simplification that was a NOOP. DAG size: 52 [2020-11-30 02:26:05,004 WARN L193 SmtUtils]: Spent 13.04 s on a formula simplification that was a NOOP. DAG size: 53 [2020-11-30 02:26:07,831 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 28 [2020-11-30 02:26:08,281 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-11-30 02:26:13,288 WARN L193 SmtUtils]: Spent 2.55 s on a formula simplification that was a NOOP. DAG size: 28 [2020-11-30 02:26:16,022 WARN L193 SmtUtils]: Spent 909.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2020-11-30 02:26:18,432 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-11-30 02:26:26,133 WARN L193 SmtUtils]: Spent 4.63 s on a formula simplification that was a NOOP. DAG size: 52 [2020-11-30 02:26:36,877 WARN L193 SmtUtils]: Spent 6.98 s on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-11-30 02:26:38,343 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-11-30 02:26:41,703 WARN L193 SmtUtils]: Spent 2.96 s on a formula simplification that was a NOOP. DAG size: 47 [2020-11-30 02:26:45,827 WARN L193 SmtUtils]: Spent 3.17 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-30 02:26:50,093 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 36 [2020-11-30 02:26:54,994 WARN L193 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-11-30 02:26:57,648 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-11-30 02:27:02,855 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 44 [2020-11-30 02:27:08,897 WARN L193 SmtUtils]: Spent 993.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2020-11-30 02:27:14,645 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification that was a NOOP. DAG size: 39 [2020-11-30 02:27:19,720 WARN L193 SmtUtils]: Spent 4.65 s on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-11-30 02:27:21,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:27:21,640 INFO L93 Difference]: Finished difference Result 992 states and 1274 transitions. [2020-11-30 02:27:21,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-30 02:27:21,641 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 28 [2020-11-30 02:27:21,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:27:21,648 INFO L225 Difference]: With dead ends: 992 [2020-11-30 02:27:21,648 INFO L226 Difference]: Without dead ends: 979 [2020-11-30 02:27:21,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 113.7s TimeCoverageRelationStatistics Valid=962, Invalid=4294, Unknown=0, NotChecked=0, Total=5256 [2020-11-30 02:27:21,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2020-11-30 02:27:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 564. [2020-11-30 02:27:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2020-11-30 02:27:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 736 transitions. [2020-11-30 02:27:21,767 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 736 transitions. Word has length 28 [2020-11-30 02:27:21,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:27:21,767 INFO L481 AbstractCegarLoop]: Abstraction has 564 states and 736 transitions. [2020-11-30 02:27:21,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 02:27:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 736 transitions. [2020-11-30 02:27:21,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-30 02:27:21,772 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:27:21,772 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:27:21,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:21,992 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:27:21,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:27:21,993 INFO L82 PathProgramCache]: Analyzing trace with hash -519721626, now seen corresponding path program 1 times [2020-11-30 02:27:21,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:27:21,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583475662] [2020-11-30 02:27:21,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:27:22,003 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:27:22,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2008556461] [2020-11-30 02:27:22,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:27:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:27:22,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:27:22,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:27:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:27:22,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:27:22,319 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-11-30 02:27:22,329 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:27:22,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583475662] [2020-11-30 02:27:22,329 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:27:22,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008556461] [2020-11-30 02:27:22,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1423980125] [2020-11-30 02:27:22,332 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-11-30 02:27:22,332 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:27:22,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:27:22,333 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:27:22,333 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:27:22,551 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:27:24,036 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:27:26,140 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2020-11-30 02:27:26,691 WARN L193 SmtUtils]: Spent 520.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 77 [2020-11-30 02:27:27,384 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 88 [2020-11-30 02:27:31,595 WARN L193 SmtUtils]: Spent 3.48 s on a formula simplification. DAG size of input: 136 DAG size of output: 94 [2020-11-30 02:27:36,896 WARN L193 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 139 DAG size of output: 98 [2020-11-30 02:27:43,155 WARN L193 SmtUtils]: Spent 5.12 s on a formula simplification. DAG size of input: 142 DAG size of output: 102 [2020-11-30 02:27:48,068 WARN L193 SmtUtils]: Spent 3.59 s on a formula simplification. DAG size of input: 141 DAG size of output: 96 [2020-11-30 02:27:52,477 WARN L193 SmtUtils]: Spent 3.18 s on a formula simplification. DAG size of input: 142 DAG size of output: 78 [2020-11-30 02:27:52,939 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-11-30 02:27:53,413 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-11-30 02:27:54,519 WARN L193 SmtUtils]: Spent 842.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-11-30 02:27:55,733 WARN L193 SmtUtils]: Spent 964.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-11-30 02:27:57,901 WARN L193 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 02:27:59,715 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-11-30 02:28:02,153 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-11-30 02:28:04,528 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-11-30 02:28:07,835 WARN L193 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2020-11-30 02:28:08,393 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-11-30 02:28:08,394 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:28:08,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:28:08,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-11-30 02:28:08,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846808230] [2020-11-30 02:28:08,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 02:28:08,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:08,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 02:28:08,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-11-30 02:28:08,395 INFO L87 Difference]: Start difference. First operand 564 states and 736 transitions. Second operand 7 states. [2020-11-30 02:28:09,555 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-11-30 02:28:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:11,718 INFO L93 Difference]: Finished difference Result 587 states and 764 transitions. [2020-11-30 02:28:11,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:28:11,719 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-11-30 02:28:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:11,725 INFO L225 Difference]: With dead ends: 587 [2020-11-30 02:28:11,726 INFO L226 Difference]: Without dead ends: 585 [2020-11-30 02:28:11,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 45.7s TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-11-30 02:28:11,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-11-30 02:28:11,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 566. [2020-11-30 02:28:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-11-30 02:28:11,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 730 transitions. [2020-11-30 02:28:11,815 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 730 transitions. Word has length 30 [2020-11-30 02:28:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:11,816 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 730 transitions. [2020-11-30 02:28:11,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 02:28:11,816 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 730 transitions. [2020-11-30 02:28:11,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-30 02:28:11,817 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:11,817 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:28:12,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2020-11-30 02:28:12,036 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:28:12,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:12,037 INFO L82 PathProgramCache]: Analyzing trace with hash 66020444, now seen corresponding path program 1 times [2020-11-30 02:28:12,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:12,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957796903] [2020-11-30 02:28:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:12,043 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:28:12,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630076107] [2020-11-30 02:28:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:28:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:12,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:28:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:28:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:12,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:28:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:12,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957796903] [2020-11-30 02:28:12,246 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:28:12,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630076107] [2020-11-30 02:28:12,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [70746839] [2020-11-30 02:28:12,249 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-11-30 02:28:12,249 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:28:12,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:28:12,249 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:28:12,249 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:28:12,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:28:13,004 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:28:13,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:28:13,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-11-30 02:28:13,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049767692] [2020-11-30 02:28:13,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 02:28:13,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:13,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 02:28:13,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2020-11-30 02:28:13,007 INFO L87 Difference]: Start difference. First operand 566 states and 730 transitions. Second operand 12 states. [2020-11-30 02:28:13,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:28:13,499 INFO L93 Difference]: Finished difference Result 897 states and 1155 transitions. [2020-11-30 02:28:13,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 02:28:13,504 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 31 [2020-11-30 02:28:13,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:28:13,508 INFO L225 Difference]: With dead ends: 897 [2020-11-30 02:28:13,508 INFO L226 Difference]: Without dead ends: 585 [2020-11-30 02:28:13,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:28:13,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-11-30 02:28:13,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 558. [2020-11-30 02:28:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2020-11-30 02:28:13,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 696 transitions. [2020-11-30 02:28:13,595 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 696 transitions. Word has length 31 [2020-11-30 02:28:13,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:28:13,595 INFO L481 AbstractCegarLoop]: Abstraction has 558 states and 696 transitions. [2020-11-30 02:28:13,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 02:28:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 696 transitions. [2020-11-30 02:28:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-30 02:28:13,596 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:28:13,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:28:13,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:28:13,797 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:28:13,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:28:13,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1825447148, now seen corresponding path program 1 times [2020-11-30 02:28:13,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:28:13,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16238818] [2020-11-30 02:28:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:28:13,805 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:28:13,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168128549] [2020-11-30 02:28:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:28:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:28:13,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 02:28:13,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:28:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:28:14,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:28:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-30 02:28:14,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16238818] [2020-11-30 02:28:14,201 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:28:14,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168128549] [2020-11-30 02:28:14,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1659138409] [2020-11-30 02:28:14,203 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-11-30 02:28:14,203 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:28:14,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:28:14,204 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:28:14,204 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:28:14,245 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:28:15,522 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:28:18,420 WARN L193 SmtUtils]: Spent 2.84 s on a formula simplification. DAG size of input: 100 DAG size of output: 82 [2020-11-30 02:28:18,668 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-11-30 02:28:19,045 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-11-30 02:28:24,058 WARN L193 SmtUtils]: Spent 3.81 s on a formula simplification. DAG size of input: 134 DAG size of output: 92 [2020-11-30 02:28:28,894 WARN L193 SmtUtils]: Spent 3.67 s on a formula simplification. DAG size of input: 135 DAG size of output: 91 [2020-11-30 02:28:34,686 WARN L193 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 138 DAG size of output: 94 [2020-11-30 02:28:39,285 WARN L193 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 137 DAG size of output: 91 [2020-11-30 02:28:43,458 WARN L193 SmtUtils]: Spent 2.56 s on a formula simplification. DAG size of input: 138 DAG size of output: 77 [2020-11-30 02:28:43,997 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-11-30 02:28:44,520 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-11-30 02:28:45,572 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2020-11-30 02:28:46,768 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-11-30 02:28:49,484 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 02:28:51,737 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification. DAG size of input: 94 DAG size of output: 77 [2020-11-30 02:28:53,348 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-11-30 02:28:56,428 WARN L193 SmtUtils]: Spent 2.71 s on a formula simplification. DAG size of input: 97 DAG size of output: 78 [2020-11-30 02:28:58,930 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2020-11-30 02:28:59,556 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2020-11-30 02:28:59,557 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:28:59,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:28:59,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2020-11-30 02:28:59,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667193543] [2020-11-30 02:28:59,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 02:28:59,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:28:59,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 02:28:59,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2020-11-30 02:28:59,559 INFO L87 Difference]: Start difference. First operand 558 states and 696 transitions. Second operand 9 states. [2020-11-30 02:29:00,369 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-11-30 02:29:00,615 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-11-30 02:29:03,580 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-11-30 02:29:04,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:04,573 INFO L93 Difference]: Finished difference Result 1001 states and 1271 transitions. [2020-11-30 02:29:04,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-30 02:29:04,575 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-11-30 02:29:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:04,581 INFO L225 Difference]: With dead ends: 1001 [2020-11-30 02:29:04,581 INFO L226 Difference]: Without dead ends: 995 [2020-11-30 02:29:04,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=558, Invalid=2748, Unknown=0, NotChecked=0, Total=3306 [2020-11-30 02:29:04,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2020-11-30 02:29:04,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 571. [2020-11-30 02:29:04,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-30 02:29:04,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 722 transitions. [2020-11-30 02:29:04,707 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 722 transitions. Word has length 34 [2020-11-30 02:29:04,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:04,707 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 722 transitions. [2020-11-30 02:29:04,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 02:29:04,708 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 722 transitions. [2020-11-30 02:29:04,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-30 02:29:04,709 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:04,709 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:04,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:29:04,936 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:29:04,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:04,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1990446240, now seen corresponding path program 1 times [2020-11-30 02:29:04,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:29:04,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173019685] [2020-11-30 02:29:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:29:04,953 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:29:04,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1778997282] [2020-11-30 02:29:04,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:29:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:05,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 02:29:05,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:29:05,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:05,071 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-30 02:29:05,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173019685] [2020-11-30 02:29:05,072 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:29:05,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778997282] [2020-11-30 02:29:05,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:05,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2020-11-30 02:29:05,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716106009] [2020-11-30 02:29:05,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:29:05,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:29:05,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:29:05,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:29:05,073 INFO L87 Difference]: Start difference. First operand 571 states and 722 transitions. Second operand 6 states. [2020-11-30 02:29:05,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:05,401 INFO L93 Difference]: Finished difference Result 1024 states and 1305 transitions. [2020-11-30 02:29:05,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:29:05,403 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-11-30 02:29:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:05,407 INFO L225 Difference]: With dead ends: 1024 [2020-11-30 02:29:05,407 INFO L226 Difference]: Without dead ends: 710 [2020-11-30 02:29:05,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:29:05,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2020-11-30 02:29:05,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 668. [2020-11-30 02:29:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2020-11-30 02:29:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 835 transitions. [2020-11-30 02:29:05,553 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 835 transitions. Word has length 36 [2020-11-30 02:29:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:05,555 INFO L481 AbstractCegarLoop]: Abstraction has 668 states and 835 transitions. [2020-11-30 02:29:05,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:29:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 835 transitions. [2020-11-30 02:29:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-30 02:29:05,556 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:05,557 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:05,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:29:05,775 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:29:05,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:05,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1532793425, now seen corresponding path program 1 times [2020-11-30 02:29:05,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:29:05,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129643407] [2020-11-30 02:29:05,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:29:05,782 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:29:05,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705561546] [2020-11-30 02:29:05,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:29:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:05,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-30 02:29:05,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:05,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:06,130 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:06,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129643407] [2020-11-30 02:29:06,130 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:29:06,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705561546] [2020-11-30 02:29:06,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328267701] [2020-11-30 02:29:06,133 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2020-11-30 02:29:06,133 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:29:06,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:29:06,134 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:29:06,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:29:06,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:29:08,009 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:29:08,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:29:08,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-11-30 02:29:08,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356643363] [2020-11-30 02:29:08,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 02:29:08,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:29:08,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 02:29:08,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:29:08,011 INFO L87 Difference]: Start difference. First operand 668 states and 835 transitions. Second operand 16 states. [2020-11-30 02:29:08,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:08,968 INFO L93 Difference]: Finished difference Result 1671 states and 2118 transitions. [2020-11-30 02:29:08,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-30 02:29:08,970 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-11-30 02:29:08,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:08,976 INFO L225 Difference]: With dead ends: 1671 [2020-11-30 02:29:08,977 INFO L226 Difference]: Without dead ends: 1376 [2020-11-30 02:29:08,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=391, Unknown=0, NotChecked=0, Total=600 [2020-11-30 02:29:08,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2020-11-30 02:29:09,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1226. [2020-11-30 02:29:09,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1226 states. [2020-11-30 02:29:09,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1510 transitions. [2020-11-30 02:29:09,265 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 1510 transitions. Word has length 38 [2020-11-30 02:29:09,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:09,265 INFO L481 AbstractCegarLoop]: Abstraction has 1226 states and 1510 transitions. [2020-11-30 02:29:09,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 02:29:09,266 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 1510 transitions. [2020-11-30 02:29:09,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-30 02:29:09,267 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:09,267 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:29:09,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2020-11-30 02:29:09,492 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:29:09,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:09,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1084763321, now seen corresponding path program 1 times [2020-11-30 02:29:09,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:29:09,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196036363] [2020-11-30 02:29:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:29:09,506 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-30 02:29:09,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087387754] [2020-11-30 02:29:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:29:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:09,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-30 02:29:09,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:09,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:10,294 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-11-30 02:29:12,310 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 11 [2020-11-30 02:29:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:12,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196036363] [2020-11-30 02:29:12,345 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:29:12,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087387754] [2020-11-30 02:29:12,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1358024796] [2020-11-30 02:29:12,348 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2020-11-30 02:29:12,348 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:29:12,349 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:29:12,349 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:29:12,349 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:29:12,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:29:14,356 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:29:14,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 02:29:14,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-11-30 02:29:14,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614751190] [2020-11-30 02:29:14,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-30 02:29:14,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:29:14,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-30 02:29:14,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-30 02:29:14,358 INFO L87 Difference]: Start difference. First operand 1226 states and 1510 transitions. Second operand 15 states. [2020-11-30 02:29:14,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:14,367 INFO L93 Difference]: Finished difference Result 1226 states and 1510 transitions. [2020-11-30 02:29:14,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:29:14,368 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-11-30 02:29:14,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:14,368 INFO L225 Difference]: With dead ends: 1226 [2020-11-30 02:29:14,368 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:29:14,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-30 02:29:14,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:29:14,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:29:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:29:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:29:14,371 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2020-11-30 02:29:14,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:14,371 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:29:14,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-30 02:29:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:29:14,372 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:29:14,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable484 [2020-11-30 02:29:14,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 02:29:14,608 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 02:29:14,608 INFO L274 CegarLoopResult]: For program point L11(lines 11 14) no Hoare annotation was computed. [2020-11-30 02:29:14,609 INFO L270 CegarLoopResult]: At program point L11-1(lines 10 16) the Hoare annotation is: false [2020-11-30 02:29:14,609 INFO L274 CegarLoopResult]: For program point L11-2(lines 11 14) no Hoare annotation was computed. [2020-11-30 02:29:14,609 INFO L270 CegarLoopResult]: At program point L11-3(lines 10 16) the Hoare annotation is: false [2020-11-30 02:29:14,609 INFO L274 CegarLoopResult]: For program point L11-4(lines 11 14) no Hoare annotation was computed. [2020-11-30 02:29:14,609 INFO L270 CegarLoopResult]: At program point L11-5(lines 10 16) the Hoare annotation is: false [2020-11-30 02:29:14,609 INFO L274 CegarLoopResult]: For program point L11-6(lines 11 14) no Hoare annotation was computed. [2020-11-30 02:29:14,609 INFO L270 CegarLoopResult]: At program point L11-7(lines 54 55) the Hoare annotation is: false [2020-11-30 02:29:14,609 INFO L274 CegarLoopResult]: For program point L11-8(lines 11 14) no Hoare annotation was computed. [2020-11-30 02:29:14,609 INFO L277 CegarLoopResult]: At program point L11-9(lines 10 16) the Hoare annotation is: true [2020-11-30 02:29:14,609 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 02:29:14,609 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 02:29:14,610 INFO L274 CegarLoopResult]: For program point L12(lines 12 13) no Hoare annotation was computed. [2020-11-30 02:29:14,610 INFO L274 CegarLoopResult]: For program point L12-1(lines 12 13) no Hoare annotation was computed. [2020-11-30 02:29:14,610 INFO L274 CegarLoopResult]: For program point L12-2(lines 12 13) no Hoare annotation was computed. [2020-11-30 02:29:14,610 INFO L274 CegarLoopResult]: For program point L12-3(lines 12 13) no Hoare annotation was computed. [2020-11-30 02:29:14,610 INFO L274 CegarLoopResult]: For program point L12-4(lines 12 13) no Hoare annotation was computed. [2020-11-30 02:29:14,610 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 02:29:14,610 INFO L274 CegarLoopResult]: For program point L48-1(lines 48 58) no Hoare annotation was computed. [2020-11-30 02:29:14,610 INFO L270 CegarLoopResult]: At program point L48-3(lines 48 58) the Hoare annotation is: false [2020-11-30 02:29:14,610 INFO L274 CegarLoopResult]: For program point L48-4(lines 48 58) no Hoare annotation was computed. [2020-11-30 02:29:14,610 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 02:29:14,610 INFO L274 CegarLoopResult]: For program point L41-1(lines 41 61) no Hoare annotation was computed. [2020-11-30 02:29:14,611 INFO L270 CegarLoopResult]: At program point L41-3(lines 41 61) the Hoare annotation is: false [2020-11-30 02:29:14,611 INFO L274 CegarLoopResult]: For program point L41-4(lines 41 61) no Hoare annotation was computed. [2020-11-30 02:29:14,611 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 02:29:14,611 INFO L274 CegarLoopResult]: For program point L42(lines 42 43) no Hoare annotation was computed. [2020-11-30 02:29:14,611 INFO L274 CegarLoopResult]: For program point L34-1(lines 34 72) no Hoare annotation was computed. [2020-11-30 02:29:14,611 INFO L270 CegarLoopResult]: At program point L34-3(lines 34 72) the Hoare annotation is: false [2020-11-30 02:29:14,611 INFO L274 CegarLoopResult]: For program point L34-4(lines 34 72) no Hoare annotation was computed. [2020-11-30 02:29:14,611 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-30 02:29:14,611 INFO L274 CegarLoopResult]: For program point L35(lines 35 36) no Hoare annotation was computed. [2020-11-30 02:29:14,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:29:14 BoogieIcfgContainer [2020-11-30 02:29:14,620 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:29:14,621 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:29:14,621 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:29:14,621 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:29:14,621 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:23:50" (3/4) ... [2020-11-30 02:29:14,623 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:29:14,633 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2020-11-30 02:29:14,633 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-30 02:29:14,634 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 02:29:14,634 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 02:29:14,672 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1e0f7606-9e9f-4f20-8a85-469f3f028330/bin/utaipan/witness.graphml [2020-11-30 02:29:14,673 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:29:14,674 INFO L168 Benchmark]: Toolchain (without parser) took 325576.70 ms. Allocated memory was 77.6 MB in the beginning and 207.6 MB in the end (delta: 130.0 MB). Free memory was 43.6 MB in the beginning and 50.7 MB in the end (delta: -7.1 MB). Peak memory consumption was 122.9 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:14,674 INFO L168 Benchmark]: CDTParser took 1.25 ms. Allocated memory is still 77.6 MB. Free memory is still 59.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:29:14,675 INFO L168 Benchmark]: CACSL2BoogieTranslator took 432.48 ms. Allocated memory was 77.6 MB in the beginning and 96.5 MB in the end (delta: 18.9 MB). Free memory was 43.4 MB in the beginning and 74.2 MB in the end (delta: -30.8 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:14,675 INFO L168 Benchmark]: Boogie Procedure Inliner took 67.15 ms. Allocated memory is still 96.5 MB. Free memory was 74.2 MB in the beginning and 72.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:14,675 INFO L168 Benchmark]: Boogie Preprocessor took 49.16 ms. Allocated memory is still 96.5 MB. Free memory was 72.5 MB in the beginning and 71.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:14,676 INFO L168 Benchmark]: RCFGBuilder took 807.32 ms. Allocated memory is still 96.5 MB. Free memory was 71.2 MB in the beginning and 72.7 MB in the end (delta: -1.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:14,676 INFO L168 Benchmark]: TraceAbstraction took 324159.35 ms. Allocated memory was 96.5 MB in the beginning and 207.6 MB in the end (delta: 111.1 MB). Free memory was 72.4 MB in the beginning and 54.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 128.0 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:14,677 INFO L168 Benchmark]: Witness Printer took 52.30 ms. Allocated memory is still 207.6 MB. Free memory was 54.9 MB in the beginning and 50.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:14,679 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.25 ms. Allocated memory is still 77.6 MB. Free memory is still 59.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 432.48 ms. Allocated memory was 77.6 MB in the beginning and 96.5 MB in the end (delta: 18.9 MB). Free memory was 43.4 MB in the beginning and 74.2 MB in the end (delta: -30.8 MB). Peak memory consumption was 5.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 67.15 ms. Allocated memory is still 96.5 MB. Free memory was 74.2 MB in the beginning and 72.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.16 ms. Allocated memory is still 96.5 MB. Free memory was 72.5 MB in the beginning and 71.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 807.32 ms. Allocated memory is still 96.5 MB. Free memory was 71.2 MB in the beginning and 72.7 MB in the end (delta: -1.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 324159.35 ms. Allocated memory was 96.5 MB in the beginning and 207.6 MB in the end (delta: 111.1 MB). Free memory was 72.4 MB in the beginning and 54.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 128.0 MB. Max. memory is 16.1 GB. * Witness Printer took 52.30 ms. Allocated memory is still 207.6 MB. Free memory was 54.9 MB in the beginning and 50.7 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 54]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 324.0s, OverallIterations: 19, TraceHistogramMax: 4, AutomataDifference: 170.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 626 SDtfs, 2086 SDslu, 2760 SDs, 0 SdLazy, 1761 SolverSat, 457 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 52.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1039 GetRequests, 710 SyntacticMatches, 11 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 244.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1226occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 1424 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 9 NumberOfFragments, 8 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 10.4s InterpolantComputationTime, 408 NumberOfCodeBlocks, 408 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 774 ConstructedInterpolants, 0 QuantifiedInterpolants, 128685 SizeOfPredicates, 138 NumberOfNonLiveVariables, 2247 ConjunctsInSsa, 257 ConjunctsInUnsatCore, 37 InterpolantComputations, 17 PerfectInterpolantSequences, 155/296 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: OVERALL_TIME[ms]: 1787, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 24, DAG_INTERPRETER_EARLY_EXITS: 2, TOOLS_POST_APPLICATIONS: 51, TOOLS_POST_TIME[ms]: 662, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 51, TOOLS_QUANTIFIERELIM_TIME[ms]: 631, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 314, FLUID_QUERY_TIME[ms]: 7, FLUID_QUERIES: 82, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 5, DOMAIN_JOIN_TIME[ms]: 518, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 276, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME[ms]: 37, DOMAIN_ISBOTTOM_APPLICATIONS: 24, DOMAIN_ISBOTTOM_TIME[ms]: 208, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 455, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 455, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 4, REGEX_TO_DAG_TIME[ms]: 4, DAG_COMPRESSION_TIME[ms]: 26, DAG_COMPRESSION_PROCESSED_NODES: 277, DAG_COMPRESSION_RETAINED_NODES: 78, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...