./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-1.i --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_73887037-3dda-4991-8134-700967ceddbf/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/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 9b4637dc8cec016362b73cb3abfcfe80e3e63b6e .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:35:50,374 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:35:50,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:35:50,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:35:50,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:35:50,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:35:50,454 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:35:50,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:35:50,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:35:50,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:35:50,474 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:35:50,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:35:50,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:35:50,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:35:50,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:35:50,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:35:50,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:35:50,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:35:50,494 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:35:50,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:35:50,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:35:50,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:35:50,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:35:50,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:35:50,518 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:35:50,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:35:50,519 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:35:50,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:35:50,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:35:50,524 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:35:50,524 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:35:50,526 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:35:50,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:35:50,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:35:50,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:35:50,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:35:50,533 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:35:50,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:35:50,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:35:50,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:35:50,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:35:50,538 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-03 12:35:50,586 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:35:50,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:35:50,588 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:35:50,588 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:35:50,588 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:35:50,589 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:35:50,589 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:35:50,589 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:35:50,590 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:35:50,590 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:35:50,591 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:35:50,591 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:35:50,592 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:35:50,592 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:35:50,592 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:35:50,593 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:35:50,594 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-03 12:35:50,594 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:35:50,594 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-03 12:35:50,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:35:50,595 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:35:50,595 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:35:50,595 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:35:50,596 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-03 12:35:50,596 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-03 12:35:50,596 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:35:50,597 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:35:50,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:35:50,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:35:50,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:35:50,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:35:50,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:35:50,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:35:50,599 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:35:50,599 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:35:50,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:35:50,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:35:50,600 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:35:50,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:35:50,601 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_73887037-3dda-4991-8134-700967ceddbf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b4637dc8cec016362b73cb3abfcfe80e3e63b6e [2020-12-03 12:35:50,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:35:50,911 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:35:50,913 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:35:50,914 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:35:50,918 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:35:50,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/bin/utaipan/../../sv-benchmarks/c/pthread/triangular-1.i [2020-12-03 12:35:51,010 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/bin/utaipan/data/899752b1c/a825b4eaa86a45b699f2640308decefe/FLAG70eb226cc [2020-12-03 12:35:51,511 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:35:51,511 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/sv-benchmarks/c/pthread/triangular-1.i [2020-12-03 12:35:51,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/bin/utaipan/data/899752b1c/a825b4eaa86a45b699f2640308decefe/FLAG70eb226cc [2020-12-03 12:35:51,833 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/bin/utaipan/data/899752b1c/a825b4eaa86a45b699f2640308decefe [2020-12-03 12:35:51,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:35:51,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:35:51,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:35:51,839 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:35:51,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:35:51,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:35:51" (1/1) ... [2020-12-03 12:35:51,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46b4e317 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:51, skipping insertion in model container [2020-12-03 12:35:51,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:35:51" (1/1) ... [2020-12-03 12:35:51,853 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:35:51,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:35:52,246 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_73887037-3dda-4991-8134-700967ceddbf/sv-benchmarks/c/pthread/triangular-1.i[30950,30963] [2020-12-03 12:35:52,250 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:35:52,259 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:35:52,298 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_73887037-3dda-4991-8134-700967ceddbf/sv-benchmarks/c/pthread/triangular-1.i[30950,30963] [2020-12-03 12:35:52,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:35:52,379 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:35:52,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:52 WrapperNode [2020-12-03 12:35:52,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:35:52,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:35:52,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:35:52,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:35:52,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:52" (1/1) ... [2020-12-03 12:35:52,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:52" (1/1) ... [2020-12-03 12:35:52,422 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:35:52,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:35:52,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:35:52,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:35:52,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:52" (1/1) ... [2020-12-03 12:35:52,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:52" (1/1) ... [2020-12-03 12:35:52,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:52" (1/1) ... [2020-12-03 12:35:52,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:52" (1/1) ... [2020-12-03 12:35:52,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:52" (1/1) ... [2020-12-03 12:35:52,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:52" (1/1) ... [2020-12-03 12:35:52,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:52" (1/1) ... [2020-12-03 12:35:52,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:35:52,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:35:52,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:35:52,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:35:52,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/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 [2020-12-03 12:35:52,524 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-03 12:35:52,524 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-03 12:35:52,524 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-03 12:35:52,525 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-03 12:35:52,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-03 12:35:52,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-03 12:35:52,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-03 12:35:52,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-03 12:35:52,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-03 12:35:52,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-03 12:35:52,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:35:52,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:35:52,528 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-03 12:35:52,846 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:35:52,846 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-03 12:35:52,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:52 BoogieIcfgContainer [2020-12-03 12:35:52,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:35:52,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:35:52,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:35:52,854 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:35:52,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:35:51" (1/3) ... [2020-12-03 12:35:52,855 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19686d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:35:52, skipping insertion in model container [2020-12-03 12:35:52,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:52" (2/3) ... [2020-12-03 12:35:52,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19686d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:35:52, skipping insertion in model container [2020-12-03 12:35:52,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:52" (3/3) ... [2020-12-03 12:35:52,857 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-12-03 12:35:52,871 WARN L169 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-03 12:35:52,871 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:35:52,874 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-03 12:35:52,875 INFO L354 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-03 12:35:52,902 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,902 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,902 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,902 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,903 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,903 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,903 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,903 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,903 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,904 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,905 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,905 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,905 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,905 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,906 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,906 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,907 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,907 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,907 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,908 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,908 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,908 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,909 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,909 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,909 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,909 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,909 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,910 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,911 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,911 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,911 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,911 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,912 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,913 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,913 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,913 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,913 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,914 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,914 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,914 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,914 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,914 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,915 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,917 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,917 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,917 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,917 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,918 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,918 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,922 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,922 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,922 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,922 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,923 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,923 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-03 12:35:52,925 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-03 12:35:52,935 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-03 12:35:52,955 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:35:52,955 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:35:52,956 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:35:52,956 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:35:52,956 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:35:52,956 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:35:52,956 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:35:52,956 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:35:52,968 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-03 12:35:52,970 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 60 transitions, 130 flow [2020-12-03 12:35:52,972 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 60 transitions, 130 flow [2020-12-03 12:35:52,974 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 62 places, 60 transitions, 130 flow [2020-12-03 12:35:53,064 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2020-12-03 12:35:53,064 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-03 12:35:53,069 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 58 events. 5/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2020-12-03 12:35:53,072 INFO L116 LiptonReduction]: Number of co-enabled transitions 968 [2020-12-03 12:35:55,134 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-03 12:35:55,792 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-03 12:35:55,911 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-03 12:35:56,233 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-03 12:35:56,388 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-03 12:35:56,411 INFO L131 LiptonReduction]: Checked pairs total: 998 [2020-12-03 12:35:56,411 INFO L133 LiptonReduction]: Total number of compositions: 52 [2020-12-03 12:35:56,416 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-12-03 12:35:56,425 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-12-03 12:35:56,427 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-03 12:35:56,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 12:35:56,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:56,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 12:35:56,433 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:56,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:56,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1332860337, now seen corresponding path program 1 times [2020-12-03 12:35:56,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:56,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891171929] [2020-12-03 12:35:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:56,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:56,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891171929] [2020-12-03 12:35:56,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:56,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:56,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931152102] [2020-12-03 12:35:56,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:35:56,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:56,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:35:56,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:56,725 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-12-03 12:35:56,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:56,795 INFO L93 Difference]: Finished difference Result 59 states and 152 transitions. [2020-12-03 12:35:56,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:35:56,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-03 12:35:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:56,810 INFO L225 Difference]: With dead ends: 59 [2020-12-03 12:35:56,810 INFO L226 Difference]: Without dead ends: 38 [2020-12-03 12:35:56,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-03 12:35:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-03 12:35:56,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-03 12:35:56,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-12-03 12:35:56,856 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 6 [2020-12-03 12:35:56,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:56,857 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-12-03 12:35:56,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:35:56,857 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-12-03 12:35:56,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 12:35:56,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:56,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:56,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:35:56,859 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:56,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:56,864 INFO L82 PathProgramCache]: Analyzing trace with hash -978539367, now seen corresponding path program 1 times [2020-12-03 12:35:56,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:56,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9537379] [2020-12-03 12:35:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:56,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9537379] [2020-12-03 12:35:56,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:56,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:56,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759944317] [2020-12-03 12:35:56,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:35:56,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:56,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:35:56,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:56,971 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 5 states. [2020-12-03 12:35:57,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:57,035 INFO L93 Difference]: Finished difference Result 82 states and 192 transitions. [2020-12-03 12:35:57,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:35:57,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-03 12:35:57,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:57,042 INFO L225 Difference]: With dead ends: 82 [2020-12-03 12:35:57,042 INFO L226 Difference]: Without dead ends: 74 [2020-12-03 12:35:57,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-03 12:35:57,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2020-12-03 12:35:57,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-03 12:35:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-12-03 12:35:57,068 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 8 [2020-12-03 12:35:57,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:57,068 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-12-03 12:35:57,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:35:57,069 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-12-03 12:35:57,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 12:35:57,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:57,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:57,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:35:57,071 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:57,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:57,073 INFO L82 PathProgramCache]: Analyzing trace with hash -978459387, now seen corresponding path program 2 times [2020-12-03 12:35:57,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:57,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873960007] [2020-12-03 12:35:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:57,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873960007] [2020-12-03 12:35:57,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:57,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:57,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98380916] [2020-12-03 12:35:57,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:35:57,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:57,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:35:57,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:57,224 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 5 states. [2020-12-03 12:35:57,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:57,306 INFO L93 Difference]: Finished difference Result 62 states and 143 transitions. [2020-12-03 12:35:57,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:35:57,306 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-03 12:35:57,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:57,307 INFO L225 Difference]: With dead ends: 62 [2020-12-03 12:35:57,308 INFO L226 Difference]: Without dead ends: 50 [2020-12-03 12:35:57,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:35:57,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-03 12:35:57,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-03 12:35:57,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-03 12:35:57,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-12-03 12:35:57,314 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-12-03 12:35:57,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:57,315 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-12-03 12:35:57,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:35:57,315 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-12-03 12:35:57,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:57,316 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:57,316 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:57,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:35:57,317 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:57,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:57,318 INFO L82 PathProgramCache]: Analyzing trace with hash 220478720, now seen corresponding path program 1 times [2020-12-03 12:35:57,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:57,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585460023] [2020-12-03 12:35:57,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:57,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:57,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585460023] [2020-12-03 12:35:57,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:57,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:35:57,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068817003] [2020-12-03 12:35:57,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:35:57,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:57,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:35:57,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:57,402 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-12-03 12:35:57,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:57,485 INFO L93 Difference]: Finished difference Result 58 states and 132 transitions. [2020-12-03 12:35:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:35:57,485 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-03 12:35:57,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:57,486 INFO L225 Difference]: With dead ends: 58 [2020-12-03 12:35:57,487 INFO L226 Difference]: Without dead ends: 51 [2020-12-03 12:35:57,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:35:57,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-03 12:35:57,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-12-03 12:35:57,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-03 12:35:57,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-12-03 12:35:57,493 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 10 [2020-12-03 12:35:57,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:57,493 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-12-03 12:35:57,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:35:57,493 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-12-03 12:35:57,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:57,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:57,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:57,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-03 12:35:57,495 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:57,495 INFO L82 PathProgramCache]: Analyzing trace with hash 266866190, now seen corresponding path program 2 times [2020-12-03 12:35:57,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:57,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634601290] [2020-12-03 12:35:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:57,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634601290] [2020-12-03 12:35:57,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:57,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:35:57,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979971524] [2020-12-03 12:35:57,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:35:57,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:57,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:35:57,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:57,566 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 6 states. [2020-12-03 12:35:57,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:57,646 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-12-03 12:35:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 12:35:57,647 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-03 12:35:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:57,648 INFO L225 Difference]: With dead ends: 78 [2020-12-03 12:35:57,648 INFO L226 Difference]: Without dead ends: 71 [2020-12-03 12:35:57,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:35:57,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-03 12:35:57,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-12-03 12:35:57,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-03 12:35:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-12-03 12:35:57,654 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-12-03 12:35:57,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:57,655 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-12-03 12:35:57,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:35:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-12-03 12:35:57,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:57,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:57,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:57,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-03 12:35:57,664 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:57,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:57,664 INFO L82 PathProgramCache]: Analyzing trace with hash 266888510, now seen corresponding path program 3 times [2020-12-03 12:35:57,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:57,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388729819] [2020-12-03 12:35:57,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:57,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388729819] [2020-12-03 12:35:57,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:57,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:35:57,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213683024] [2020-12-03 12:35:57,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:35:57,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:57,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:35:57,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:57,773 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-12-03 12:35:57,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:57,861 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-12-03 12:35:57,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:35:57,865 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-03 12:35:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:57,866 INFO L225 Difference]: With dead ends: 54 [2020-12-03 12:35:57,866 INFO L226 Difference]: Without dead ends: 43 [2020-12-03 12:35:57,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:35:57,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-03 12:35:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-12-03 12:35:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-03 12:35:57,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-12-03 12:35:57,869 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-12-03 12:35:57,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:57,870 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-12-03 12:35:57,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:35:57,870 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-12-03 12:35:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:57,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:57,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:57,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-03 12:35:57,871 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:57,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:57,871 INFO L82 PathProgramCache]: Analyzing trace with hash 266773190, now seen corresponding path program 4 times [2020-12-03 12:35:57,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:57,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466556408] [2020-12-03 12:35:57,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:57,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466556408] [2020-12-03 12:35:57,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:57,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-03 12:35:57,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669072008] [2020-12-03 12:35:57,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:35:57,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:57,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:35:57,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:57,947 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-12-03 12:35:58,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:58,107 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2020-12-03 12:35:58,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 12:35:58,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-03 12:35:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:58,111 INFO L225 Difference]: With dead ends: 55 [2020-12-03 12:35:58,111 INFO L226 Difference]: Without dead ends: 49 [2020-12-03 12:35:58,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:35:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-03 12:35:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-12-03 12:35:58,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-03 12:35:58,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-12-03 12:35:58,126 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-12-03 12:35:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:58,126 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-12-03 12:35:58,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:35:58,126 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-12-03 12:35:58,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-03 12:35:58,127 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:58,127 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:58,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-03 12:35:58,127 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:58,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:58,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1755209235, now seen corresponding path program 5 times [2020-12-03 12:35:58,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:58,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197442452] [2020-12-03 12:35:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:58,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:58,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197442452] [2020-12-03 12:35:58,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499455665] [2020-12-03 12:35:58,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/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 [2020-12-03 12:35:58,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-03 12:35:58,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:35:58,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-03 12:35:58,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:58,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:58,453 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 12:35:58,454 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:58,485 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:58,521 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:58,557 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:58,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [713735684] [2020-12-03 12:35:58,631 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) 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:380) 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) [2020-12-03 12:35:58,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:35:58,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-12-03 12:35:58,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464100376] [2020-12-03 12:35:58,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:35:58,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:58,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:35:58,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:35:58,635 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 12 states. [2020-12-03 12:35:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:58,797 INFO L93 Difference]: Finished difference Result 71 states and 159 transitions. [2020-12-03 12:35:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-03 12:35:58,798 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-03 12:35:58,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:58,800 INFO L225 Difference]: With dead ends: 71 [2020-12-03 12:35:58,800 INFO L226 Difference]: Without dead ends: 53 [2020-12-03 12:35:58,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-12-03 12:35:58,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-03 12:35:58,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-12-03 12:35:58,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-03 12:35:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 115 transitions. [2020-12-03 12:35:58,816 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 115 transitions. Word has length 11 [2020-12-03 12:35:58,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:58,816 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 115 transitions. [2020-12-03 12:35:58,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:35:58,816 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 115 transitions. [2020-12-03 12:35:58,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-03 12:35:58,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:58,820 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:59,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-03 12:35:59,034 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:59,034 INFO L82 PathProgramCache]: Analyzing trace with hash -316364261, now seen corresponding path program 6 times [2020-12-03 12:35:59,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:59,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175869932] [2020-12-03 12:35:59,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:59,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175869932] [2020-12-03 12:35:59,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738501573] [2020-12-03 12:35:59,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/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 [2020-12-03 12:35:59,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-03 12:35:59,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:35:59,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-03 12:35:59,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:59,242 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 12:35:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:59,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:59,260 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 12:35:59,260 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:59,268 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:35:59,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:59,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1132202864] [2020-12-03 12:35:59,312 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) 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:380) 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) [2020-12-03 12:35:59,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:35:59,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-12-03 12:35:59,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195236580] [2020-12-03 12:35:59,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:35:59,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:59,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:35:59,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:35:59,315 INFO L87 Difference]: Start difference. First operand 49 states and 115 transitions. Second operand 12 states. [2020-12-03 12:35:59,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:59,567 INFO L93 Difference]: Finished difference Result 89 states and 211 transitions. [2020-12-03 12:35:59,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-03 12:35:59,567 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-03 12:35:59,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:59,568 INFO L225 Difference]: With dead ends: 89 [2020-12-03 12:35:59,568 INFO L226 Difference]: Without dead ends: 64 [2020-12-03 12:35:59,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2020-12-03 12:35:59,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-03 12:35:59,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2020-12-03 12:35:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-03 12:35:59,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 128 transitions. [2020-12-03 12:35:59,573 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 128 transitions. Word has length 11 [2020-12-03 12:35:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:59,573 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 128 transitions. [2020-12-03 12:35:59,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:35:59,573 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 128 transitions. [2020-12-03 12:35:59,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-03 12:35:59,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:59,575 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:59,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:35:59,794 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:35:59,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:59,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1554804726, now seen corresponding path program 7 times [2020-12-03 12:35:59,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:59,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775035213] [2020-12-03 12:35:59,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:59,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:35:59,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775035213] [2020-12-03 12:35:59,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561672120] [2020-12-03 12:35:59,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/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 [2020-12-03 12:36:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:00,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-03 12:36:00,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:00,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:00,066 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 12:36:00,066 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:36:00,075 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:36:00,104 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:36:00,131 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:36:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:00,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1949691104] [2020-12-03 12:36:00,206 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) 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:380) 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) [2020-12-03 12:36:00,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:00,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2020-12-03 12:36:00,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358801457] [2020-12-03 12:36:00,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-03 12:36:00,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:00,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-03 12:36:00,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-03 12:36:00,208 INFO L87 Difference]: Start difference. First operand 54 states and 128 transitions. Second operand 16 states. [2020-12-03 12:36:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:00,629 INFO L93 Difference]: Finished difference Result 148 states and 331 transitions. [2020-12-03 12:36:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-03 12:36:00,629 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-12-03 12:36:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:00,631 INFO L225 Difference]: With dead ends: 148 [2020-12-03 12:36:00,631 INFO L226 Difference]: Without dead ends: 121 [2020-12-03 12:36:00,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=799, Unknown=0, NotChecked=0, Total=1122 [2020-12-03 12:36:00,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-03 12:36:00,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 69. [2020-12-03 12:36:00,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-03 12:36:00,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-12-03 12:36:00,647 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 14 [2020-12-03 12:36:00,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:00,647 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-12-03 12:36:00,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-03 12:36:00,647 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-12-03 12:36:00,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-03 12:36:00,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:00,650 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:00,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-03 12:36:00,870 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:36:00,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:00,870 INFO L82 PathProgramCache]: Analyzing trace with hash -867590526, now seen corresponding path program 8 times [2020-12-03 12:36:00,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:00,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305198354] [2020-12-03 12:36:00,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:00,972 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:00,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305198354] [2020-12-03 12:36:00,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419211622] [2020-12-03 12:36:00,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/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 [2020-12-03 12:36:01,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-03 12:36:01,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:36:01,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-03 12:36:01,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:01,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:01,143 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 12:36:01,143 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:36:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-03 12:36:01,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [509256199] [2020-12-03 12:36:01,259 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) 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:380) 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) [2020-12-03 12:36:01,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:01,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2020-12-03 12:36:01,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25815189] [2020-12-03 12:36:01,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-03 12:36:01,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:01,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-03 12:36:01,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-03 12:36:01,268 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 17 states. [2020-12-03 12:36:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:01,919 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-12-03 12:36:01,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-03 12:36:01,920 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-03 12:36:01,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:01,921 INFO L225 Difference]: With dead ends: 144 [2020-12-03 12:36:01,921 INFO L226 Difference]: Without dead ends: 94 [2020-12-03 12:36:01,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2020-12-03 12:36:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-03 12:36:01,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 57. [2020-12-03 12:36:01,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-03 12:36:01,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-12-03 12:36:01,938 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 14 [2020-12-03 12:36:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:01,939 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-12-03 12:36:01,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-03 12:36:01,939 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-12-03 12:36:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-03 12:36:01,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:01,939 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:02,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:02,158 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:36:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:02,158 INFO L82 PathProgramCache]: Analyzing trace with hash 3376071, now seen corresponding path program 9 times [2020-12-03 12:36:02,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:02,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192710508] [2020-12-03 12:36:02,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:02,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192710508] [2020-12-03 12:36:02,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992257047] [2020-12-03 12:36:02,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/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 [2020-12-03 12:36:02,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-03 12:36:02,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:36:02,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-03 12:36:02,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:02,430 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-03 12:36:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:02,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:02,436 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-12-03 12:36:02,437 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:36:02,474 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-12-03 12:36:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:02,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2104918206] [2020-12-03 12:36:02,637 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:294) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:269) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:234) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:213) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:111) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) 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:380) 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) [2020-12-03 12:36:02,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:02,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2020-12-03 12:36:02,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201197465] [2020-12-03 12:36:02,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-03 12:36:02,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:02,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-03 12:36:02,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-12-03 12:36:02,645 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 25 states. [2020-12-03 12:36:03,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:03,202 INFO L93 Difference]: Finished difference Result 99 states and 238 transitions. [2020-12-03 12:36:03,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-03 12:36:03,203 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 17 [2020-12-03 12:36:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:03,204 INFO L225 Difference]: With dead ends: 99 [2020-12-03 12:36:03,204 INFO L226 Difference]: Without dead ends: 89 [2020-12-03 12:36:03,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1282, Unknown=0, NotChecked=0, Total=1806 [2020-12-03 12:36:03,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-03 12:36:03,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-12-03 12:36:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-03 12:36:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-12-03 12:36:03,214 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 17 [2020-12-03 12:36:03,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:03,216 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-12-03 12:36:03,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-03 12:36:03,216 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-12-03 12:36:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-03 12:36:03,217 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:03,218 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:03,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-03 12:36:03,426 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:36:03,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:03,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1305714133, now seen corresponding path program 10 times [2020-12-03 12:36:03,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:03,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180209825] [2020-12-03 12:36:03,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:03,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180209825] [2020-12-03 12:36:03,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915944506] [2020-12-03 12:36:03,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/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 [2020-12-03 12:36:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:03,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 12:36:03,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:03,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:03,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-03 12:36:03,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [8] total 9 [2020-12-03 12:36:03,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617547951] [2020-12-03 12:36:03,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 12:36:03,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:03,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 12:36:03,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:36:03,660 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 8 states. [2020-12-03 12:36:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:03,679 INFO L93 Difference]: Finished difference Result 167 states and 363 transitions. [2020-12-03 12:36:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 12:36:03,680 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-03 12:36:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:03,681 INFO L225 Difference]: With dead ends: 167 [2020-12-03 12:36:03,681 INFO L226 Difference]: Without dead ends: 36 [2020-12-03 12:36:03,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:36:03,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-03 12:36:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-03 12:36:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-03 12:36:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 65 transitions. [2020-12-03 12:36:03,684 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 65 transitions. Word has length 19 [2020-12-03 12:36:03,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:03,684 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 65 transitions. [2020-12-03 12:36:03,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 12:36:03,685 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 65 transitions. [2020-12-03 12:36:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-03 12:36:03,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:03,686 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:36:03,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:03,914 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-03 12:36:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:03,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1049833557, now seen corresponding path program 11 times [2020-12-03 12:36:03,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:03,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750947039] [2020-12-03 12:36:03,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:03,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750947039] [2020-12-03 12:36:03,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208552264] [2020-12-03 12:36:03,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/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 [2020-12-03 12:36:04,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-03 12:36:04,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:36:04,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 12:36:04,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:04,142 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:04,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:36:04,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-03 12:36:04,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [8] total 9 [2020-12-03 12:36:04,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128774172] [2020-12-03 12:36:04,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 12:36:04,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:04,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 12:36:04,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:36:04,177 INFO L87 Difference]: Start difference. First operand 36 states and 65 transitions. Second operand 8 states. [2020-12-03 12:36:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:04,193 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2020-12-03 12:36:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-03 12:36:04,194 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-03 12:36:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:04,194 INFO L225 Difference]: With dead ends: 56 [2020-12-03 12:36:04,194 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 12:36:04,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:36:04,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 12:36:04,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 12:36:04,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 12:36:04,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 12:36:04,195 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-12-03 12:36:04,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:04,196 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 12:36:04,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 12:36:04,196 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 12:36:04,196 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 12:36:04,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-03 12:36:04,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:36:04 BasicIcfg [2020-12-03 12:36:04,422 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:36:04,422 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:36:04,422 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:36:04,422 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:36:04,423 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:52" (3/4) ... [2020-12-03 12:36:04,425 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 12:36:04,432 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2020-12-03 12:36:04,432 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2020-12-03 12:36:04,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-12-03 12:36:04,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-03 12:36:04,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-03 12:36:04,436 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 12:36:04,464 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_73887037-3dda-4991-8134-700967ceddbf/bin/utaipan/witness.graphml [2020-12-03 12:36:04,465 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:36:04,466 INFO L168 Benchmark]: Toolchain (without parser) took 12628.77 ms. Allocated memory was 83.9 MB in the beginning and 237.0 MB in the end (delta: 153.1 MB). Free memory was 48.6 MB in the beginning and 194.1 MB in the end (delta: -145.5 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:04,466 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 83.9 MB. Free memory was 55.9 MB in the beginning and 55.9 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:04,467 INFO L168 Benchmark]: CACSL2BoogieTranslator took 541.22 ms. Allocated memory was 83.9 MB in the beginning and 113.2 MB in the end (delta: 29.4 MB). Free memory was 48.4 MB in the beginning and 70.5 MB in the end (delta: -22.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:04,467 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.95 ms. Allocated memory is still 113.2 MB. Free memory was 70.5 MB in the beginning and 68.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:04,468 INFO L168 Benchmark]: Boogie Preprocessor took 28.73 ms. Allocated memory is still 113.2 MB. Free memory was 68.8 MB in the beginning and 67.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:04,468 INFO L168 Benchmark]: RCFGBuilder took 395.77 ms. Allocated memory is still 113.2 MB. Free memory was 67.1 MB in the beginning and 76.9 MB in the end (delta: -9.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:04,469 INFO L168 Benchmark]: TraceAbstraction took 11571.89 ms. Allocated memory was 113.2 MB in the beginning and 237.0 MB in the end (delta: 123.7 MB). Free memory was 76.3 MB in the beginning and 196.7 MB in the end (delta: -120.3 MB). Peak memory consumption was 3.8 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:04,469 INFO L168 Benchmark]: Witness Printer took 42.66 ms. Allocated memory is still 237.0 MB. Free memory was 196.7 MB in the beginning and 194.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:04,472 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 83.9 MB. Free memory was 55.9 MB in the beginning and 55.9 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 541.22 ms. Allocated memory was 83.9 MB in the beginning and 113.2 MB in the end (delta: 29.4 MB). Free memory was 48.4 MB in the beginning and 70.5 MB in the end (delta: -22.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.95 ms. Allocated memory is still 113.2 MB. Free memory was 70.5 MB in the beginning and 68.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.73 ms. Allocated memory is still 113.2 MB. Free memory was 68.8 MB in the beginning and 67.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 395.77 ms. Allocated memory is still 113.2 MB. Free memory was 67.1 MB in the beginning and 76.9 MB in the end (delta: -9.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11571.89 ms. Allocated memory was 113.2 MB in the beginning and 237.0 MB in the end (delta: 123.7 MB). Free memory was 76.3 MB in the beginning and 196.7 MB in the end (delta: -120.3 MB). Peak memory consumption was 3.8 MB. Max. memory is 16.1 GB. * Witness Printer took 42.66 ms. Allocated memory is still 237.0 MB. Free memory was 196.7 MB in the beginning and 194.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 645 VarBasedMoverChecksPositive, 20 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 20 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.4s, 62 PlacesBefore, 20 PlacesAfterwards, 60 TransitionsBefore, 16 TransitionsAfterwards, 968 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 52 TotalNumberOfCompositions, 998 MoverChecksTotal - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.4s, OverallIterations: 14, TraceHistogramMax: 6, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.4s, HoareTripleCheckerStatistics: 231 SDtfs, 647 SDslu, 580 SDs, 0 SdLazy, 628 SolverSat, 322 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 368 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=12, 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, 192 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 272 NumberOfCodeBlocks, 271 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 349 ConstructedInterpolants, 0 QuantifiedInterpolants, 16209 SizeOfPredicates, 25 NumberOfNonLiveVariables, 800 ConjunctsInSsa, 70 ConjunctsInUnsatCore, 28 InterpolantComputations, 11 PerfectInterpolantSequences, 142/246 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...