./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c -s /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/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 da2855a3b9d79ea31d743c942a3327e8ed25edbd ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 04:44:07,440 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 04:44:07,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 04:44:07,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 04:44:07,473 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 04:44:07,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 04:44:07,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 04:44:07,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 04:44:07,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 04:44:07,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 04:44:07,482 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 04:44:07,483 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 04:44:07,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 04:44:07,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 04:44:07,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 04:44:07,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 04:44:07,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 04:44:07,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 04:44:07,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 04:44:07,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 04:44:07,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 04:44:07,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 04:44:07,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 04:44:07,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 04:44:07,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 04:44:07,501 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 04:44:07,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 04:44:07,503 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 04:44:07,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 04:44:07,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 04:44:07,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 04:44:07,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 04:44:07,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 04:44:07,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 04:44:07,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 04:44:07,509 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 04:44:07,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 04:44:07,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 04:44:07,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 04:44:07,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 04:44:07,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 04:44:07,513 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 04:44:07,530 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 04:44:07,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 04:44:07,531 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 04:44:07,531 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 04:44:07,531 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 04:44:07,531 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 04:44:07,531 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 04:44:07,532 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 04:44:07,532 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 04:44:07,532 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 04:44:07,532 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 04:44:07,532 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 04:44:07,532 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 04:44:07,532 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 04:44:07,532 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 04:44:07,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 04:44:07,533 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 04:44:07,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 04:44:07,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 04:44:07,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 04:44:07,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 04:44:07,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 04:44:07,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 04:44:07,534 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 04:44:07,534 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 04:44:07,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 04:44:07,534 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 04:44:07,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 04:44:07,535 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 04:44:07,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 04:44:07,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:44:07,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 04:44:07,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 04:44:07,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 04:44:07,535 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 04:44:07,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 04:44:07,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 04:44:07,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 04:44:07,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 04:44:07,536 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_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da2855a3b9d79ea31d743c942a3327e8ed25edbd [2020-12-09 04:44:07,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 04:44:07,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 04:44:07,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 04:44:07,763 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 04:44:07,764 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 04:44:07,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2020-12-09 04:44:07,807 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/data/c6382fd80/b1d36de4f82a434eaaa59e597a97ec3c/FLAG7e1ae0bd7 [2020-12-09 04:44:08,184 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 04:44:08,184 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c [2020-12-09 04:44:08,189 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/data/c6382fd80/b1d36de4f82a434eaaa59e597a97ec3c/FLAG7e1ae0bd7 [2020-12-09 04:44:08,204 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/data/c6382fd80/b1d36de4f82a434eaaa59e597a97ec3c [2020-12-09 04:44:08,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 04:44:08,207 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 04:44:08,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 04:44:08,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 04:44:08,212 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 04:44:08,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:44:08" (1/1) ... [2020-12-09 04:44:08,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a0e6572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:08, skipping insertion in model container [2020-12-09 04:44:08,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:44:08" (1/1) ... [2020-12-09 04:44:08,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 04:44:08,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 04:44:08,359 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2020-12-09 04:44:08,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:44:08,380 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 04:44:08,389 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound5.c[490,503] [2020-12-09 04:44:08,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 04:44:08,405 INFO L208 MainTranslator]: Completed translation [2020-12-09 04:44:08,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:08 WrapperNode [2020-12-09 04:44:08,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 04:44:08,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 04:44:08,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 04:44:08,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 04:44:08,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:08" (1/1) ... [2020-12-09 04:44:08,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:08" (1/1) ... [2020-12-09 04:44:08,433 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 04:44:08,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 04:44:08,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 04:44:08,434 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 04:44:08,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:08" (1/1) ... [2020-12-09 04:44:08,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:08" (1/1) ... [2020-12-09 04:44:08,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:08" (1/1) ... [2020-12-09 04:44:08,442 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:08" (1/1) ... [2020-12-09 04:44:08,445 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:08" (1/1) ... [2020-12-09 04:44:08,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:08" (1/1) ... [2020-12-09 04:44:08,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:08" (1/1) ... [2020-12-09 04:44:08,451 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 04:44:08,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 04:44:08,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 04:44:08,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 04:44:08,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 04:44:08,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 04:44:08,510 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 04:44:08,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 04:44:08,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 04:44:08,778 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 04:44:08,778 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-09 04:44:08,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:44:08 BoogieIcfgContainer [2020-12-09 04:44:08,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 04:44:08,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 04:44:08,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 04:44:08,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 04:44:08,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:44:08" (1/3) ... [2020-12-09 04:44:08,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27fb9bb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:44:08, skipping insertion in model container [2020-12-09 04:44:08,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:44:08" (2/3) ... [2020-12-09 04:44:08,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27fb9bb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:44:08, skipping insertion in model container [2020-12-09 04:44:08,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:44:08" (3/3) ... [2020-12-09 04:44:08,788 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound5.c [2020-12-09 04:44:08,801 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 04:44:08,804 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-09 04:44:08,815 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-09 04:44:08,837 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 04:44:08,837 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 04:44:08,838 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 04:44:08,838 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 04:44:08,838 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 04:44:08,838 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 04:44:08,838 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 04:44:08,838 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 04:44:08,849 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-09 04:44:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 04:44:08,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:44:08,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 04:44:08,853 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]=== [2020-12-09 04:44:08,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:44:08,857 INFO L82 PathProgramCache]: Analyzing trace with hash 160510030, now seen corresponding path program 1 times [2020-12-09 04:44:08,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:44:08,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736446225] [2020-12-09 04:44:08,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:44:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:44:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:08,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736446225] [2020-12-09 04:44:08,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:44:08,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 04:44:08,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353990793] [2020-12-09 04:44:08,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 04:44:08,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:44:08,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 04:44:08,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 04:44:08,998 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-12-09 04:44:09,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:44:09,013 INFO L93 Difference]: Finished difference Result 65 states and 91 transitions. [2020-12-09 04:44:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 04:44:09,014 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 04:44:09,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:44:09,022 INFO L225 Difference]: With dead ends: 65 [2020-12-09 04:44:09,022 INFO L226 Difference]: Without dead ends: 31 [2020-12-09 04:44:09,025 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 [2020-12-09 04:44:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-09 04:44:09,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-12-09 04:44:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-09 04:44:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-12-09 04:44:09,049 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 5 [2020-12-09 04:44:09,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:44:09,049 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-12-09 04:44:09,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 04:44:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-12-09 04:44:09,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 04:44:09,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:44:09,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 04:44:09,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 04:44:09,050 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]=== [2020-12-09 04:44:09,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:44:09,050 INFO L82 PathProgramCache]: Analyzing trace with hash 592212585, now seen corresponding path program 1 times [2020-12-09 04:44:09,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:44:09,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612172109] [2020-12-09 04:44:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:44:09,071 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:44:09,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1708627391] [2020-12-09 04:44:09,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:44:09,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 04:44:09,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:44:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:09,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:44:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:09,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612172109] [2020-12-09 04:44:09,170 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:44:09,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708627391] [2020-12-09 04:44:09,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:44:09,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 04:44:09,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602977904] [2020-12-09 04:44:09,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 04:44:09,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:44:09,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 04:44:09,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:44:09,172 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 6 states. [2020-12-09 04:44:09,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:44:09,205 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-12-09 04:44:09,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 04:44:09,206 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-12-09 04:44:09,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:44:09,206 INFO L225 Difference]: With dead ends: 43 [2020-12-09 04:44:09,206 INFO L226 Difference]: Without dead ends: 39 [2020-12-09 04:44:09,207 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 [2020-12-09 04:44:09,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-09 04:44:09,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2020-12-09 04:44:09,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-09 04:44:09,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-12-09 04:44:09,212 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2020-12-09 04:44:09,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:44:09,212 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-12-09 04:44:09,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 04:44:09,212 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-12-09 04:44:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 04:44:09,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:44:09,213 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:44:09,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 04:44:09,414 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]=== [2020-12-09 04:44:09,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:44:09,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1177973352, now seen corresponding path program 1 times [2020-12-09 04:44:09,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:44:09,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826964383] [2020-12-09 04:44:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:44:09,430 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:44:09,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160729716] [2020-12-09 04:44:09,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:44:09,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 04:44:09,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:44:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:09,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:44:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:09,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826964383] [2020-12-09 04:44:09,481 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:44:09,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160729716] [2020-12-09 04:44:09,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:44:09,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-12-09 04:44:09,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422674418] [2020-12-09 04:44:09,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 04:44:09,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:44:09,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 04:44:09,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 04:44:09,483 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 3 states. [2020-12-09 04:44:09,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:44:09,502 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-12-09 04:44:09,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 04:44:09,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-09 04:44:09,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:44:09,503 INFO L225 Difference]: With dead ends: 61 [2020-12-09 04:44:09,503 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 04:44:09,504 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 [2020-12-09 04:44:09,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 04:44:09,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 34. [2020-12-09 04:44:09,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 04:44:09,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-09 04:44:09,508 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 7 [2020-12-09 04:44:09,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:44:09,508 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-09 04:44:09,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 04:44:09,508 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-09 04:44:09,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 04:44:09,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:44:09,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:44:09,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:09,711 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]=== [2020-12-09 04:44:09,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:44:09,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1175714080, now seen corresponding path program 1 times [2020-12-09 04:44:09,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:44:09,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65768936] [2020-12-09 04:44:09,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:44:09,758 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:44:09,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1319529745] [2020-12-09 04:44:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:44:09,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 04:44:09,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:44:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:09,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:44:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:09,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65768936] [2020-12-09 04:44:09,854 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:44:09,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319529745] [2020-12-09 04:44:09,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:44:09,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 04:44:09,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887803791] [2020-12-09 04:44:09,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 04:44:09,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:44:09,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 04:44:09,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:44:09,855 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 6 states. [2020-12-09 04:44:09,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:44:09,929 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2020-12-09 04:44:09,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 04:44:09,929 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-09 04:44:09,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:44:09,930 INFO L225 Difference]: With dead ends: 75 [2020-12-09 04:44:09,930 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 04:44:09,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:44:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 04:44:09,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 48. [2020-12-09 04:44:09,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-09 04:44:09,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-12-09 04:44:09,937 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 11 [2020-12-09 04:44:09,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:44:09,937 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-12-09 04:44:09,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 04:44:09,937 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-12-09 04:44:09,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 04:44:09,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:44:09,937 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:44:10,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:10,139 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]=== [2020-12-09 04:44:10,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:44:10,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2121654826, now seen corresponding path program 1 times [2020-12-09 04:44:10,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:44:10,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786274950] [2020-12-09 04:44:10,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:44:10,180 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:44:10,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577991183] [2020-12-09 04:44:10,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:44:10,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 04:44:10,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:44:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:10,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:44:10,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:10,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786274950] [2020-12-09 04:44:10,377 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:44:10,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577991183] [2020-12-09 04:44:10,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:44:10,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-12-09 04:44:10,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3458589] [2020-12-09 04:44:10,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 04:44:10,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:44:10,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 04:44:10,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:44:10,379 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 8 states. [2020-12-09 04:44:10,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:44:10,421 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2020-12-09 04:44:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 04:44:10,421 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-09 04:44:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:44:10,423 INFO L225 Difference]: With dead ends: 111 [2020-12-09 04:44:10,424 INFO L226 Difference]: Without dead ends: 81 [2020-12-09 04:44:10,424 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 [2020-12-09 04:44:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-09 04:44:10,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2020-12-09 04:44:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-09 04:44:10,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-12-09 04:44:10,435 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 12 [2020-12-09 04:44:10,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:44:10,435 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-12-09 04:44:10,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 04:44:10,436 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-12-09 04:44:10,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 04:44:10,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:44:10,436 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:44:10,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:10,638 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]=== [2020-12-09 04:44:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:44:10,639 INFO L82 PathProgramCache]: Analyzing trace with hash 222893626, now seen corresponding path program 1 times [2020-12-09 04:44:10,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:44:10,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141420602] [2020-12-09 04:44:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:44:10,681 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:44:10,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478728413] [2020-12-09 04:44:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:44:10,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 04:44:10,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:44:10,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:10,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:44:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:10,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141420602] [2020-12-09 04:44:10,776 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:44:10,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478728413] [2020-12-09 04:44:10,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1358247812] [2020-12-09 04:44:10,791 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 04:44:10,791 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:44:10,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:44:10,798 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:44:10,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:44:10,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:44:11,417 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:44:11,606 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-09 04:44:11,802 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-12-09 04:44:12,340 WARN L197 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 98 [2020-12-09 04:44:12,848 WARN L197 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 98 [2020-12-09 04:44:13,268 WARN L197 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 94 [2020-12-09 04:44:13,760 WARN L197 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 95 [2020-12-09 04:44:14,092 WARN L197 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 81 [2020-12-09 04:44:14,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 04:44:14,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 5] total 15 [2020-12-09 04:44:14,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271536787] [2020-12-09 04:44:14,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 04:44:14,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:44:14,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 04:44:14,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-12-09 04:44:14,095 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 9 states. [2020-12-09 04:44:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:44:14,230 INFO L93 Difference]: Finished difference Result 108 states and 137 transitions. [2020-12-09 04:44:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 04:44:14,231 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-09 04:44:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:44:14,232 INFO L225 Difference]: With dead ends: 108 [2020-12-09 04:44:14,232 INFO L226 Difference]: Without dead ends: 78 [2020-12-09 04:44:14,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-12-09 04:44:14,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-09 04:44:14,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2020-12-09 04:44:14,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-09 04:44:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2020-12-09 04:44:14,242 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 13 [2020-12-09 04:44:14,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:44:14,242 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2020-12-09 04:44:14,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 04:44:14,243 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2020-12-09 04:44:14,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 04:44:14,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:44:14,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:44:14,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 04:44:14,444 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]=== [2020-12-09 04:44:14,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:44:14,446 INFO L82 PathProgramCache]: Analyzing trace with hash 284988995, now seen corresponding path program 1 times [2020-12-09 04:44:14,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:44:14,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794045975] [2020-12-09 04:44:14,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:44:14,486 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:44:14,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118039354] [2020-12-09 04:44:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/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 [2020-12-09 04:44:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:44:14,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-09 04:44:14,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:44:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:14,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:44:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:14,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794045975] [2020-12-09 04:44:14,581 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:44:14,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118039354] [2020-12-09 04:44:14,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:44:14,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-12-09 04:44:14,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923430417] [2020-12-09 04:44:14,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 04:44:14,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:44:14,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 04:44:14,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:44:14,583 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand 6 states. [2020-12-09 04:44:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:44:14,687 INFO L93 Difference]: Finished difference Result 100 states and 124 transitions. [2020-12-09 04:44:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 04:44:14,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-09 04:44:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:44:14,689 INFO L225 Difference]: With dead ends: 100 [2020-12-09 04:44:14,689 INFO L226 Difference]: Without dead ends: 98 [2020-12-09 04:44:14,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:44:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-09 04:44:14,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 71. [2020-12-09 04:44:14,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-09 04:44:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2020-12-09 04:44:14,699 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 13 [2020-12-09 04:44:14,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:44:14,699 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2020-12-09 04:44:14,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 04:44:14,699 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2020-12-09 04:44:14,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 04:44:14,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:44:14,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:44:14,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:14,901 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]=== [2020-12-09 04:44:14,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:44:14,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1003325434, now seen corresponding path program 1 times [2020-12-09 04:44:14,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:44:14,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475119439] [2020-12-09 04:44:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:44:14,915 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:44:14,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568626500] [2020-12-09 04:44:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:44:14,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-09 04:44:14,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:44:14,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:14,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:44:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:15,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475119439] [2020-12-09 04:44:15,015 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:44:15,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568626500] [2020-12-09 04:44:15,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:44:15,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-12-09 04:44:15,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196637776] [2020-12-09 04:44:15,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 04:44:15,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:44:15,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 04:44:15,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-09 04:44:15,016 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand 7 states. [2020-12-09 04:44:15,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:44:15,160 INFO L93 Difference]: Finished difference Result 141 states and 174 transitions. [2020-12-09 04:44:15,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 04:44:15,160 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-09 04:44:15,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:44:15,161 INFO L225 Difference]: With dead ends: 141 [2020-12-09 04:44:15,161 INFO L226 Difference]: Without dead ends: 139 [2020-12-09 04:44:15,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-09 04:44:15,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-12-09 04:44:15,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 94. [2020-12-09 04:44:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-09 04:44:15,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2020-12-09 04:44:15,169 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 15 [2020-12-09 04:44:15,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:44:15,169 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2020-12-09 04:44:15,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 04:44:15,170 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2020-12-09 04:44:15,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 04:44:15,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:44:15,170 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:44:15,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:15,372 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]=== [2020-12-09 04:44:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:44:15,373 INFO L82 PathProgramCache]: Analyzing trace with hash -2122910103, now seen corresponding path program 1 times [2020-12-09 04:44:15,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:44:15,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768310605] [2020-12-09 04:44:15,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:44:15,399 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:44:15,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787173910] [2020-12-09 04:44:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/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 [2020-12-09 04:44:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:44:15,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 04:44:15,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:44:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:15,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:44:15,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:15,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768310605] [2020-12-09 04:44:15,523 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:44:15,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787173910] [2020-12-09 04:44:15,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-12-09 04:44:15,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-12-09 04:44:15,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614754988] [2020-12-09 04:44:15,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 04:44:15,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:44:15,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 04:44:15,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 04:44:15,524 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand 6 states. [2020-12-09 04:44:17,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:44:17,660 INFO L93 Difference]: Finished difference Result 261 states and 351 transitions. [2020-12-09 04:44:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 04:44:17,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-09 04:44:17,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:44:17,662 INFO L225 Difference]: With dead ends: 261 [2020-12-09 04:44:17,662 INFO L226 Difference]: Without dead ends: 259 [2020-12-09 04:44:17,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-09 04:44:17,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-09 04:44:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 160. [2020-12-09 04:44:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-09 04:44:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 207 transitions. [2020-12-09 04:44:17,680 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 207 transitions. Word has length 17 [2020-12-09 04:44:17,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:44:17,680 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 207 transitions. [2020-12-09 04:44:17,680 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 04:44:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 207 transitions. [2020-12-09 04:44:17,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 04:44:17,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:44:17,681 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:44:17,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-09 04:44:17,882 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]=== [2020-12-09 04:44:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:44:17,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1003876369, now seen corresponding path program 1 times [2020-12-09 04:44:17,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:44:17,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746885306] [2020-12-09 04:44:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:44:17,913 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:44:17,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588474414] [2020-12-09 04:44:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/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 [2020-12-09 04:44:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:44:17,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-09 04:44:17,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:44:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:18,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:44:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:18,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746885306] [2020-12-09 04:44:18,113 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:44:18,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588474414] [2020-12-09 04:44:18,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2115736982] [2020-12-09 04:44:18,115 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-09 04:44:18,115 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:44:18,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:44:18,115 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:44:18,115 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:44:18,132 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:44:18,509 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:44:18,694 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-12-09 04:44:19,486 WARN L197 SmtUtils]: Spent 714.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 118 [2020-12-09 04:44:19,979 WARN L197 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 95 [2020-12-09 04:44:20,475 WARN L197 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 91 [2020-12-09 04:44:21,024 WARN L197 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 98 [2020-12-09 04:44:21,576 WARN L197 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 94 [2020-12-09 04:44:21,932 WARN L197 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 80 [2020-12-09 04:44:22,478 WARN L197 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 97 [2020-12-09 04:44:23,046 WARN L197 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 100 [2020-12-09 04:44:23,621 WARN L197 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 99 [2020-12-09 04:44:23,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 04:44:23,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 6] total 21 [2020-12-09 04:44:23,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414295613] [2020-12-09 04:44:23,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 04:44:23,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:44:23,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 04:44:23,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-12-09 04:44:23,623 INFO L87 Difference]: Start difference. First operand 160 states and 207 transitions. Second operand 12 states. [2020-12-09 04:44:24,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:44:24,027 INFO L93 Difference]: Finished difference Result 288 states and 378 transitions. [2020-12-09 04:44:24,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 04:44:24,028 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-12-09 04:44:24,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:44:24,029 INFO L225 Difference]: With dead ends: 288 [2020-12-09 04:44:24,029 INFO L226 Difference]: Without dead ends: 171 [2020-12-09 04:44:24,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-12-09 04:44:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-09 04:44:24,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 165. [2020-12-09 04:44:24,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-09 04:44:24,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 211 transitions. [2020-12-09 04:44:24,042 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 211 transitions. Word has length 18 [2020-12-09 04:44:24,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:44:24,042 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 211 transitions. [2020-12-09 04:44:24,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 04:44:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 211 transitions. [2020-12-09 04:44:24,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 04:44:24,043 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:44:24,043 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] [2020-12-09 04:44:24,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:24,244 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]=== [2020-12-09 04:44:24,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:44:24,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1397249398, now seen corresponding path program 1 times [2020-12-09 04:44:24,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:44:24,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537845475] [2020-12-09 04:44:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:44:24,261 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:44:24,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620822364] [2020-12-09 04:44:24,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:44:24,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 04:44:24,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:44:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:24,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:44:24,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:24,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537845475] [2020-12-09 04:44:24,363 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:44:24,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620822364] [2020-12-09 04:44:24,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [906377040] [2020-12-09 04:44:24,366 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2020-12-09 04:44:24,366 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:44:24,366 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:44:24,366 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:44:24,366 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:44:24,415 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:44:24,750 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 24 iterations. Over-approximation may be very coarse. [2020-12-09 04:44:24,752 WARN L221 IntervalDomain]: Interval conversion did not stabilize in 25 iterations. Over-approximation may be very coarse. [2020-12-09 04:44:24,848 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:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) 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) [2020-12-09 04:44:24,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 04:44:24,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-12-09 04:44:24,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622379130] [2020-12-09 04:44:24,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 04:44:24,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:44:24,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 04:44:24,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-09 04:44:24,850 INFO L87 Difference]: Start difference. First operand 165 states and 211 transitions. Second operand 8 states. [2020-12-09 04:44:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:44:24,906 INFO L93 Difference]: Finished difference Result 189 states and 238 transitions. [2020-12-09 04:44:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 04:44:24,907 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-12-09 04:44:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:44:24,908 INFO L225 Difference]: With dead ends: 189 [2020-12-09 04:44:24,908 INFO L226 Difference]: Without dead ends: 185 [2020-12-09 04:44:24,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-09 04:44:24,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-12-09 04:44:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 169. [2020-12-09 04:44:24,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-09 04:44:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 216 transitions. [2020-12-09 04:44:24,927 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 216 transitions. Word has length 27 [2020-12-09 04:44:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:44:24,927 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 216 transitions. [2020-12-09 04:44:24,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 04:44:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 216 transitions. [2020-12-09 04:44:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 04:44:24,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:44:24,929 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] [2020-12-09 04:44:25,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:25,129 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]=== [2020-12-09 04:44:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:44:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash -689968988, now seen corresponding path program 1 times [2020-12-09 04:44:25,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:44:25,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008453876] [2020-12-09 04:44:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:44:25,137 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:44:25,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1451509055] [2020-12-09 04:44:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/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 [2020-12-09 04:44:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:44:25,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 04:44:25,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:44:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:25,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:44:25,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:25,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008453876] [2020-12-09 04:44:25,269 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:44:25,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451509055] [2020-12-09 04:44:25,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114116311] [2020-12-09 04:44:25,271 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2020-12-09 04:44:25,271 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:44:25,271 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:44:25,272 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:44:25,272 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:44:25,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:44:25,891 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 04:44:26,054 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-12-09 04:44:26,186 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-09 04:44:26,396 WARN L197 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 71 [2020-12-09 04:44:26,928 WARN L197 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 96 [2020-12-09 04:44:27,457 WARN L197 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 95 [2020-12-09 04:44:27,946 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 94 [2020-12-09 04:44:28,554 WARN L197 SmtUtils]: Spent 526.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 95 [2020-12-09 04:44:28,955 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 81 [2020-12-09 04:44:29,133 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 59 [2020-12-09 04:44:29,534 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2020-12-09 04:44:29,896 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-12-09 04:44:30,298 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-12-09 04:44:30,642 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-12-09 04:44:30,643 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:44:30,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 04:44:30,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-12-09 04:44:30,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407101049] [2020-12-09 04:44:30,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 04:44:30,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:44:30,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 04:44:30,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-12-09 04:44:30,644 INFO L87 Difference]: Start difference. First operand 169 states and 216 transitions. Second operand 9 states. [2020-12-09 04:44:30,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:44:30,696 INFO L93 Difference]: Finished difference Result 246 states and 313 transitions. [2020-12-09 04:44:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 04:44:30,696 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-09 04:44:30,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:44:30,697 INFO L225 Difference]: With dead ends: 246 [2020-12-09 04:44:30,697 INFO L226 Difference]: Without dead ends: 108 [2020-12-09 04:44:30,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2020-12-09 04:44:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-09 04:44:30,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2020-12-09 04:44:30,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-09 04:44:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2020-12-09 04:44:30,705 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 28 [2020-12-09 04:44:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:44:30,705 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2020-12-09 04:44:30,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 04:44:30,705 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2020-12-09 04:44:30,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 04:44:30,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:44:30,706 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] [2020-12-09 04:44:30,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:30,907 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]=== [2020-12-09 04:44:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:44:30,908 INFO L82 PathProgramCache]: Analyzing trace with hash -365805977, now seen corresponding path program 1 times [2020-12-09 04:44:30,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:44:30,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257790792] [2020-12-09 04:44:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:44:30,921 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:44:30,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439072678] [2020-12-09 04:44:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/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 [2020-12-09 04:44:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:44:30,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-09 04:44:30,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:44:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:31,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:44:33,577 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-12-09 04:44:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:37,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257790792] [2020-12-09 04:44:37,967 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:44:37,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439072678] [2020-12-09 04:44:37,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1617044593] [2020-12-09 04:44:37,969 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2020-12-09 04:44:37,969 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:44:37,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:44:37,969 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:44:37,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:44:38,003 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:44:38,405 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:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) 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) [2020-12-09 04:44:38,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 04:44:38,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-09 04:44:38,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175678972] [2020-12-09 04:44:38,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-09 04:44:38,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:44:38,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-09 04:44:38,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=370, Unknown=3, NotChecked=0, Total=462 [2020-12-09 04:44:38,407 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand 22 states. [2020-12-09 04:44:53,372 WARN L197 SmtUtils]: Spent 604.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-09 04:44:54,051 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 59 [2020-12-09 04:44:54,793 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-12-09 04:44:57,735 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-12-09 04:44:58,677 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-12-09 04:44:59,272 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-12-09 04:44:59,619 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-12-09 04:44:59,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:44:59,620 INFO L93 Difference]: Finished difference Result 218 states and 259 transitions. [2020-12-09 04:44:59,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-09 04:44:59,620 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2020-12-09 04:44:59,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:44:59,621 INFO L225 Difference]: With dead ends: 218 [2020-12-09 04:44:59,621 INFO L226 Difference]: Without dead ends: 187 [2020-12-09 04:44:59,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1344 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=947, Invalid=3736, Unknown=9, NotChecked=0, Total=4692 [2020-12-09 04:44:59,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-09 04:44:59,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 85. [2020-12-09 04:44:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-09 04:44:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-12-09 04:44:59,632 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 28 [2020-12-09 04:44:59,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:44:59,633 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-12-09 04:44:59,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-09 04:44:59,633 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-12-09 04:44:59,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 04:44:59,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:44:59,633 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, 1] [2020-12-09 04:44:59,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:59,834 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]=== [2020-12-09 04:44:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:44:59,835 INFO L82 PathProgramCache]: Analyzing trace with hash 336377409, now seen corresponding path program 1 times [2020-12-09 04:44:59,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:44:59,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740151935] [2020-12-09 04:44:59,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:44:59,843 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:44:59,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182575164] [2020-12-09 04:44:59,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:44:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 04:44:59,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 04:44:59,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 04:44:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:59,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 04:44:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 04:44:59,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740151935] [2020-12-09 04:44:59,978 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 04:44:59,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182575164] [2020-12-09 04:44:59,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1722545762] [2020-12-09 04:44:59,980 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2020-12-09 04:44:59,980 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 04:44:59,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 04:44:59,980 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 04:44:59,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 04:45:00,019 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 04:45:00,177 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.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1133) 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:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) 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) [2020-12-09 04:45:00,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-09 04:45:00,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-09 04:45:00,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566607978] [2020-12-09 04:45:00,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 04:45:00,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 04:45:00,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 04:45:00,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-12-09 04:45:00,178 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 9 states. [2020-12-09 04:45:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 04:45:00,244 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2020-12-09 04:45:00,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 04:45:00,245 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-09 04:45:00,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 04:45:00,245 INFO L225 Difference]: With dead ends: 108 [2020-12-09 04:45:00,246 INFO L226 Difference]: Without dead ends: 86 [2020-12-09 04:45:00,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-09 04:45:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-09 04:45:00,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-09 04:45:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-09 04:45:00,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2020-12-09 04:45:00,255 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 28 [2020-12-09 04:45:00,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 04:45:00,255 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2020-12-09 04:45:00,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 04:45:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2020-12-09 04:45:00,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-09 04:45:00,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 04:45:00,256 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 04:45:00,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-12-09 04:45:00,457 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]=== [2020-12-09 04:45:00,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 04:45:00,458 INFO L82 PathProgramCache]: Analyzing trace with hash -872591145, now seen corresponding path program 1 times [2020-12-09 04:45:00,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 04:45:00,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957289821] [2020-12-09 04:45:00,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 04:45:00,476 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-09 04:45:00,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306333012] [2020-12-09 04:45:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/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 [2020-12-09 04:45:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:45:00,550 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:45:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 04:45:00,569 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 04:45:00,621 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 04:45:00,621 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 04:45:00,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 04:45:00,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:45:00 BoogieIcfgContainer [2020-12-09 04:45:00,893 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 04:45:00,894 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 04:45:00,894 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 04:45:00,894 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 04:45:00,894 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:44:08" (3/4) ... [2020-12-09 04:45:00,896 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 04:45:00,940 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_1244363c-3e2b-4ab8-bb43-b7fe6b59b41f/bin/utaipan/witness.graphml [2020-12-09 04:45:00,940 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 04:45:00,941 INFO L168 Benchmark]: Toolchain (without parser) took 52733.43 ms. Allocated memory was 81.8 MB in the beginning and 130.0 MB in the end (delta: 48.2 MB). Free memory was 62.9 MB in the beginning and 35.6 MB in the end (delta: 27.3 MB). Peak memory consumption was 73.8 MB. Max. memory is 16.1 GB. [2020-12-09 04:45:00,941 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 81.8 MB. Free memory is still 58.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:45:00,941 INFO L168 Benchmark]: CACSL2BoogieTranslator took 197.58 ms. Allocated memory is still 81.8 MB. Free memory was 62.7 MB in the beginning and 52.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 04:45:00,941 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.56 ms. Allocated memory is still 81.8 MB. Free memory was 52.4 MB in the beginning and 50.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 04:45:00,942 INFO L168 Benchmark]: Boogie Preprocessor took 17.82 ms. Allocated memory is still 81.8 MB. Free memory was 50.7 MB in the beginning and 49.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:45:00,942 INFO L168 Benchmark]: RCFGBuilder took 328.70 ms. Allocated memory is still 81.8 MB. Free memory was 49.5 MB in the beginning and 43.6 MB in the end (delta: 5.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 04:45:00,942 INFO L168 Benchmark]: TraceAbstraction took 52111.14 ms. Allocated memory was 81.8 MB in the beginning and 130.0 MB in the end (delta: 48.2 MB). Free memory was 43.2 MB in the beginning and 38.8 MB in the end (delta: 4.5 MB). Peak memory consumption was 55.4 MB. Max. memory is 16.1 GB. [2020-12-09 04:45:00,942 INFO L168 Benchmark]: Witness Printer took 46.28 ms. Allocated memory is still 130.0 MB. Free memory was 38.8 MB in the beginning and 35.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 04:45:00,944 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 81.8 MB. Free memory is still 58.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 197.58 ms. Allocated memory is still 81.8 MB. Free memory was 62.7 MB in the beginning and 52.4 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.56 ms. Allocated memory is still 81.8 MB. Free memory was 52.4 MB in the beginning and 50.7 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.82 ms. Allocated memory is still 81.8 MB. Free memory was 50.7 MB in the beginning and 49.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 328.70 ms. Allocated memory is still 81.8 MB. Free memory was 49.5 MB in the beginning and 43.6 MB in the end (delta: 5.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 52111.14 ms. Allocated memory was 81.8 MB in the beginning and 130.0 MB in the end (delta: 48.2 MB). Free memory was 43.2 MB in the beginning and 38.8 MB in the end (delta: 4.5 MB). Peak memory consumption was 55.4 MB. Max. memory is 16.1 GB. * Witness Printer took 46.28 ms. Allocated memory is still 130.0 MB. Free memory was 38.8 MB in the beginning and 35.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L8] COND FALSE !(!cond) [L8] COND FALSE !(!cond) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [counter=0] [L34] EXPR counter++ VAL [counter=1] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=1] [L41] EXPR counter++ VAL [counter=2] [L41] COND TRUE counter++<5 [L42] COND TRUE !(c >= b) VAL [counter=2] [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=2] [L34] EXPR counter++ VAL [counter=3] [L34] COND TRUE counter++<5 [L35] COND FALSE !(!(b != 0)) [L37] long long c, k; [L38] c = a [L39] k = 0 VAL [counter=3] [L41] EXPR counter++ VAL [counter=4] [L41] COND TRUE counter++<5 [L42] COND FALSE !(!(c >= b)) [L44] long long d, v; [L45] d = 1 [L46] v = b VAL [counter=4] [L48] EXPR counter++ VAL [counter=5] [L48] COND TRUE counter++<5 [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L11] COND FALSE !(!(cond)) VAL [counter=5] [L54] COND TRUE !(c >= 2 * v) VAL [counter=5] [L59] c = c - v [L60] k = k + d VAL [counter=5] [L41] EXPR counter++ VAL [counter=6] [L41] COND FALSE !(counter++<5) [L63] a = b [L64] b = c [L65] long long temp; [L66] temp = p [L67] p = q [L68] q = temp - q * k [L69] temp = r [L70] r = s [L71] s = temp - s * k VAL [counter=6] [L34] EXPR counter++ VAL [counter=7] [L34] COND FALSE !(counter++<5) [L11] COND TRUE !(cond) VAL [counter=7] [L13] reach_error() VAL [counter=7] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 51.9s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 24.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 487 SDtfs, 802 SDslu, 1621 SDs, 0 SdLazy, 1184 SolverSat, 263 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 5.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 551 GetRequests, 360 SyntacticMatches, 4 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 37.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=169occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 391 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 261 NumberOfCodeBlocks, 261 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 424 ConstructedInterpolants, 0 QuantifiedInterpolants, 80112 SizeOfPredicates, 80 NumberOfNonLiveVariables, 1392 ConjunctsInSsa, 209 ConjunctsInUnsatCore, 27 InterpolantComputations, 15 PerfectInterpolantSequences, 28/72 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]: 1021, 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]: 410, 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]: 391, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 133, FLUID_QUERY_TIME[ms]: 4, FLUID_QUERIES: 82, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 5, DOMAIN_JOIN_TIME[ms]: 358, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 123, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME[ms]: 11, DOMAIN_ISBOTTOM_APPLICATIONS: 24, DOMAIN_ISBOTTOM_TIME[ms]: 77, LOOP_SUMMARIZER_APPLICATIONS: 2, LOOP_SUMMARIZER_CACHE_MISSES: 2, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 250, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 250, 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]: 2, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 9, DAG_COMPRESSION_PROCESSED_NODES: 277, DAG_COMPRESSION_RETAINED_NODES: 78, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...