./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 f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/triangular-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 364d2e82c4effeb8ecaceffcae090ef10763971d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:57:11,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:57:11,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:57:11,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:57:11,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:57:11,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:57:11,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:57:11,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:57:11,342 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:57:11,343 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:57:11,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:57:11,346 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:57:11,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:57:11,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:57:11,348 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:57:11,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:57:11,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:57:11,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:57:11,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:57:11,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:57:11,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:57:11,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:57:11,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:57:11,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:57:11,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:57:11,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:57:11,363 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:57:11,364 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:57:11,364 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:57:11,365 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:57:11,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:57:11,367 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:57:11,368 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:57:11,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:57:11,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:57:11,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:57:11,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:57:11,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:57:11,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:57:11,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:57:11,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:57:11,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:57:11,389 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:57:11,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:57:11,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:57:11,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:57:11,392 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:57:11,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:57:11,392 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:57:11,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:57:11,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:57:11,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:57:11,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:57:11,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:57:11,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:57:11,394 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:57:11,395 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:57:11,395 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:57:11,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:57:11,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:57:11,396 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:57:11,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:57:11,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:57:11,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:57:11,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:57:11,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:57:11,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:57:11,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:57:11,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:57:11,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:57:11,399 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:57:11,399 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer 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 -> 364d2e82c4effeb8ecaceffcae090ef10763971d [2019-11-28 17:57:11,698 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:57:11,713 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:57:11,719 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:57:11,721 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:57:11,722 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:57:11,723 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-1.i [2019-11-28 17:57:11,800 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49b3dba58/a8234cd45f634a92a5e497c2de6181ed/FLAGa28a10f87 [2019-11-28 17:57:12,428 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:57:12,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-1.i [2019-11-28 17:57:12,451 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49b3dba58/a8234cd45f634a92a5e497c2de6181ed/FLAGa28a10f87 [2019-11-28 17:57:12,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49b3dba58/a8234cd45f634a92a5e497c2de6181ed [2019-11-28 17:57:12,714 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:57:12,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:57:12,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:57:12,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:57:12,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:57:12,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:57:12" (1/1) ... [2019-11-28 17:57:12,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75aef439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:12, skipping insertion in model container [2019-11-28 17:57:12,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:57:12" (1/1) ... [2019-11-28 17:57:12,733 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:57:12,779 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:57:13,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:57:13,293 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:57:13,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:57:13,434 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:57:13,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:13 WrapperNode [2019-11-28 17:57:13,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:57:13,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:57:13,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:57:13,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:57:13,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:13" (1/1) ... [2019-11-28 17:57:13,465 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:13" (1/1) ... [2019-11-28 17:57:13,487 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:57:13,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:57:13,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:57:13,488 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:57:13,497 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:13" (1/1) ... [2019-11-28 17:57:13,497 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:13" (1/1) ... [2019-11-28 17:57:13,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:13" (1/1) ... [2019-11-28 17:57:13,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:13" (1/1) ... [2019-11-28 17:57:13,506 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:13" (1/1) ... [2019-11-28 17:57:13,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:13" (1/1) ... [2019-11-28 17:57:13,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:13" (1/1) ... [2019-11-28 17:57:13,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:57:13,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:57:13,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:57:13,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:57:13,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 17:57:13,574 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-11-28 17:57:13,574 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-11-28 17:57:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-11-28 17:57:13,575 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-11-28 17:57:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-28 17:57:13,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-11-28 17:57:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-28 17:57:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-28 17:57:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-11-28 17:57:13,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:57:13,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:57:13,578 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-11-28 17:57:13,959 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:57:13,960 INFO L287 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-28 17:57:13,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:57:13 BoogieIcfgContainer [2019-11-28 17:57:13,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:57:13,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:57:13,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:57:13,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:57:13,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:57:12" (1/3) ... [2019-11-28 17:57:13,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270e31cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:57:13, skipping insertion in model container [2019-11-28 17:57:13,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:57:13" (2/3) ... [2019-11-28 17:57:13,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@270e31cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:57:13, skipping insertion in model container [2019-11-28 17:57:13,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:57:13" (3/3) ... [2019-11-28 17:57:13,971 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2019-11-28 17:57:13,981 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-11-28 17:57:13,982 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:57:13,987 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:57:13,988 INFO L339 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2019-11-28 17:57:14,011 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,012 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,012 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,012 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,013 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,013 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,013 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,014 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,014 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,014 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,014 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,014 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,015 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,015 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,015 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,015 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,015 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,016 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,016 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,016 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,016 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,017 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,017 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,017 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,018 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,018 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,018 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,018 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-28 17:57:14,047 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-28 17:57:14,070 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:57:14,070 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:57:14,071 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:57:14,071 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:57:14,072 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:57:14,072 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:57:14,072 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:57:14,073 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:57:14,091 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 53 places, 51 transitions [2019-11-28 17:57:14,093 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-11-28 17:57:14,156 INFO L134 PetriNetUnfolder]: 5/49 cut-off events. [2019-11-28 17:57:14,157 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-11-28 17:57:14,163 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 92 event pairs. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-11-28 17:57:14,166 INFO L68 FinitePrefix]: Start finitePrefix. Operand has 53 places, 51 transitions [2019-11-28 17:57:14,180 INFO L134 PetriNetUnfolder]: 5/49 cut-off events. [2019-11-28 17:57:14,180 INFO L135 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2019-11-28 17:57:14,182 INFO L76 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 5/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 92 event pairs. 6/49 useless extension candidates. Maximal degree in co-relation 37. Up to 2 conditions per place. [2019-11-28 17:57:14,184 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 740 [2019-11-28 17:57:14,185 INFO L170 etLargeBlockEncoding]: Semantic Check. [2019-11-28 17:57:15,291 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2019-11-28 17:57:15,425 INFO L206 etLargeBlockEncoding]: Checked pairs total: 604 [2019-11-28 17:57:15,425 INFO L214 etLargeBlockEncoding]: Total number of compositions: 41 [2019-11-28 17:57:15,429 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 16 places, 14 transitions [2019-11-28 17:57:15,441 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 35 states. [2019-11-28 17:57:15,443 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-11-28 17:57:15,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-28 17:57:15,450 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:15,451 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-28 17:57:15,451 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:15,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:15,458 INFO L82 PathProgramCache]: Analyzing trace with hash 205828742, now seen corresponding path program 1 times [2019-11-28 17:57:15,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:15,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018919452] [2019-11-28 17:57:15,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:15,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018919452] [2019-11-28 17:57:15,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:57:15,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-11-28 17:57:15,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57533383] [2019-11-28 17:57:15,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-28 17:57:15,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:15,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-28 17:57:15,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 17:57:15,878 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-11-28 17:57:15,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:15,915 INFO L93 Difference]: Finished difference Result 44 states and 107 transitions. [2019-11-28 17:57:15,917 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-28 17:57:15,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-11-28 17:57:15,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:15,951 INFO L225 Difference]: With dead ends: 44 [2019-11-28 17:57:15,953 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 17:57:15,957 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-28 17:57:15,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 17:57:15,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 17:57:16,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:57:16,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 56 transitions. [2019-11-28 17:57:16,003 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 56 transitions. Word has length 5 [2019-11-28 17:57:16,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:16,004 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 56 transitions. [2019-11-28 17:57:16,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-28 17:57:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 56 transitions. [2019-11-28 17:57:16,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-28 17:57:16,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:16,005 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:16,005 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:16,005 INFO L82 PathProgramCache]: Analyzing trace with hash 232910220, now seen corresponding path program 1 times [2019-11-28 17:57:16,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:16,006 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080299674] [2019-11-28 17:57:16,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:16,122 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080299674] [2019-11-28 17:57:16,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:57:16,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-28 17:57:16,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241434545] [2019-11-28 17:57:16,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-28 17:57:16,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:16,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-28 17:57:16,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-28 17:57:16,126 INFO L87 Difference]: Start difference. First operand 26 states and 56 transitions. Second operand 4 states. [2019-11-28 17:57:16,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:16,171 INFO L93 Difference]: Finished difference Result 40 states and 82 transitions. [2019-11-28 17:57:16,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:57:16,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-28 17:57:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:16,173 INFO L225 Difference]: With dead ends: 40 [2019-11-28 17:57:16,173 INFO L226 Difference]: Without dead ends: 30 [2019-11-28 17:57:16,174 INFO L630 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 [2019-11-28 17:57:16,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-28 17:57:16,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-11-28 17:57:16,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:57:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2019-11-28 17:57:16,184 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 7 [2019-11-28 17:57:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:16,184 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2019-11-28 17:57:16,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-28 17:57:16,185 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2019-11-28 17:57:16,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:57:16,186 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:16,186 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:16,186 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:16,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:16,187 INFO L82 PathProgramCache]: Analyzing trace with hash 484474390, now seen corresponding path program 1 times [2019-11-28 17:57:16,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:16,187 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631911741] [2019-11-28 17:57:16,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:16,274 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631911741] [2019-11-28 17:57:16,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:57:16,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-28 17:57:16,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950349259] [2019-11-28 17:57:16,275 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:57:16,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:16,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:57:16,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:57:16,276 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand 5 states. [2019-11-28 17:57:16,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:16,351 INFO L93 Difference]: Finished difference Result 38 states and 78 transitions. [2019-11-28 17:57:16,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:57:16,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 17:57:16,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:16,354 INFO L225 Difference]: With dead ends: 38 [2019-11-28 17:57:16,355 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 17:57:16,355 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:57:16,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 17:57:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2019-11-28 17:57:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-28 17:57:16,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 46 transitions. [2019-11-28 17:57:16,363 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 46 transitions. Word has length 9 [2019-11-28 17:57:16,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:16,363 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 46 transitions. [2019-11-28 17:57:16,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:57:16,364 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 46 transitions. [2019-11-28 17:57:16,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-28 17:57:16,364 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:16,364 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:16,365 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:16,365 INFO L82 PathProgramCache]: Analyzing trace with hash 2117948007, now seen corresponding path program 2 times [2019-11-28 17:57:16,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:16,365 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761588874] [2019-11-28 17:57:16,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:16,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761588874] [2019-11-28 17:57:16,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836900661] [2019-11-28 17:57:16,491 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 17:57:16,560 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:57:16,561 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:16,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 17:57:16,568 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:16,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:16,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-28 17:57:16,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264770051] [2019-11-28 17:57:16,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-28 17:57:16,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:16,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-28 17:57:16,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-28 17:57:16,621 INFO L87 Difference]: Start difference. First operand 22 states and 46 transitions. Second operand 7 states. [2019-11-28 17:57:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:16,720 INFO L93 Difference]: Finished difference Result 37 states and 76 transitions. [2019-11-28 17:57:16,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:57:16,722 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2019-11-28 17:57:16,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:16,723 INFO L225 Difference]: With dead ends: 37 [2019-11-28 17:57:16,724 INFO L226 Difference]: Without dead ends: 31 [2019-11-28 17:57:16,725 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:57:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-28 17:57:16,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2019-11-28 17:57:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-28 17:57:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 52 transitions. [2019-11-28 17:57:16,737 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 52 transitions. Word has length 10 [2019-11-28 17:57:16,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:16,737 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 52 transitions. [2019-11-28 17:57:16,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-28 17:57:16,738 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 52 transitions. [2019-11-28 17:57:16,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-28 17:57:16,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:16,740 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:16,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:16,942 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:16,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:16,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1723422894, now seen corresponding path program 3 times [2019-11-28 17:57:16,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:16,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515225065] [2019-11-28 17:57:16,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:17,084 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515225065] [2019-11-28 17:57:17,085 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467022425] [2019-11-28 17:57:17,085 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 17:57:17,145 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-28 17:57:17,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:17,147 INFO L264 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 17:57:17,153 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:17,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:17,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:17,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-28 17:57:17,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668813077] [2019-11-28 17:57:17,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:57:17,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:17,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:57:17,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:57:17,198 INFO L87 Difference]: Start difference. First operand 25 states and 52 transitions. Second operand 8 states. [2019-11-28 17:57:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:17,338 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-11-28 17:57:17,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:57:17,339 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2019-11-28 17:57:17,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:17,340 INFO L225 Difference]: With dead ends: 41 [2019-11-28 17:57:17,340 INFO L226 Difference]: Without dead ends: 37 [2019-11-28 17:57:17,340 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:57:17,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-28 17:57:17,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-11-28 17:57:17,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-28 17:57:17,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 71 transitions. [2019-11-28 17:57:17,349 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 71 transitions. Word has length 11 [2019-11-28 17:57:17,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:17,350 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 71 transitions. [2019-11-28 17:57:17,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:57:17,350 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 71 transitions. [2019-11-28 17:57:17,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-28 17:57:17,350 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:17,351 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:17,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:17,554 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:17,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:17,555 INFO L82 PathProgramCache]: Analyzing trace with hash -466461505, now seen corresponding path program 4 times [2019-11-28 17:57:17,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:17,556 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901730217] [2019-11-28 17:57:17,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:17,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901730217] [2019-11-28 17:57:17,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047290134] [2019-11-28 17:57:17,655 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 17:57:17,708 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:57:17,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:17,709 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 17:57:17,710 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:17,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:17,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:17,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 17:57:17,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535838751] [2019-11-28 17:57:17,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 17:57:17,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:17,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 17:57:17,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:57:17,733 INFO L87 Difference]: Start difference. First operand 34 states and 71 transitions. Second operand 9 states. [2019-11-28 17:57:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:17,865 INFO L93 Difference]: Finished difference Result 43 states and 88 transitions. [2019-11-28 17:57:17,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 17:57:17,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2019-11-28 17:57:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:17,867 INFO L225 Difference]: With dead ends: 43 [2019-11-28 17:57:17,867 INFO L226 Difference]: Without dead ends: 37 [2019-11-28 17:57:17,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:57:17,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-28 17:57:17,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-28 17:57:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-28 17:57:17,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 75 transitions. [2019-11-28 17:57:17,881 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 75 transitions. Word has length 12 [2019-11-28 17:57:17,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:17,881 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 75 transitions. [2019-11-28 17:57:17,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 17:57:17,881 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 75 transitions. [2019-11-28 17:57:17,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 17:57:17,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:17,884 INFO L410 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:18,094 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:18,095 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:18,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:18,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973298, now seen corresponding path program 5 times [2019-11-28 17:57:18,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:18,096 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341439121] [2019-11-28 17:57:18,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:18,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341439121] [2019-11-28 17:57:18,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216374192] [2019-11-28 17:57:18,215 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 17:57:18,264 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2019-11-28 17:57:18,264 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:18,266 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 17:57:18,268 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:18,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:18,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 17:57:18,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094956334] [2019-11-28 17:57:18,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 17:57:18,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:18,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 17:57:18,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:57:18,300 INFO L87 Difference]: Start difference. First operand 36 states and 75 transitions. Second operand 9 states. [2019-11-28 17:57:18,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:18,401 INFO L93 Difference]: Finished difference Result 41 states and 84 transitions. [2019-11-28 17:57:18,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:57:18,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2019-11-28 17:57:18,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:18,403 INFO L225 Difference]: With dead ends: 41 [2019-11-28 17:57:18,403 INFO L226 Difference]: Without dead ends: 37 [2019-11-28 17:57:18,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:57:18,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-28 17:57:18,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2019-11-28 17:57:18,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-28 17:57:18,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 56 transitions. [2019-11-28 17:57:18,408 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 56 transitions. Word has length 13 [2019-11-28 17:57:18,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:18,409 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 56 transitions. [2019-11-28 17:57:18,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 17:57:18,409 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 56 transitions. [2019-11-28 17:57:18,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-28 17:57:18,410 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:18,410 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:18,618 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:18,619 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:18,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1647973050, now seen corresponding path program 6 times [2019-11-28 17:57:18,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:18,620 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932713940] [2019-11-28 17:57:18,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:18,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932713940] [2019-11-28 17:57:18,726 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807063472] [2019-11-28 17:57:18,726 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 17:57:18,775 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2019-11-28 17:57:18,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:18,777 INFO L264 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 17:57:18,778 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:18,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:18,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-28 17:57:18,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881877886] [2019-11-28 17:57:18,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:57:18,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:18,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:57:18,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:57:18,798 INFO L87 Difference]: Start difference. First operand 27 states and 56 transitions. Second operand 10 states. [2019-11-28 17:57:18,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:18,939 INFO L93 Difference]: Finished difference Result 45 states and 92 transitions. [2019-11-28 17:57:18,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 17:57:18,942 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-11-28 17:57:18,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:18,942 INFO L225 Difference]: With dead ends: 45 [2019-11-28 17:57:18,943 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 17:57:18,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-11-28 17:57:18,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 17:57:18,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-11-28 17:57:18,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-28 17:57:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 79 transitions. [2019-11-28 17:57:18,948 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 79 transitions. Word has length 13 [2019-11-28 17:57:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:18,948 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 79 transitions. [2019-11-28 17:57:18,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:57:18,948 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 79 transitions. [2019-11-28 17:57:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-28 17:57:18,949 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:18,949 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:19,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:19,153 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:19,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:19,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1592905449, now seen corresponding path program 7 times [2019-11-28 17:57:19,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:19,154 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628072346] [2019-11-28 17:57:19,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:19,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628072346] [2019-11-28 17:57:19,259 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252339439] [2019-11-28 17:57:19,260 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 17:57:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:19,311 INFO L264 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-28 17:57:19,312 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:19,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:19,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-28 17:57:19,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307742924] [2019-11-28 17:57:19,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 17:57:19,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:19,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 17:57:19,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:57:19,346 INFO L87 Difference]: Start difference. First operand 38 states and 79 transitions. Second operand 11 states. [2019-11-28 17:57:19,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:19,501 INFO L93 Difference]: Finished difference Result 48 states and 98 transitions. [2019-11-28 17:57:19,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 17:57:19,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2019-11-28 17:57:19,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:19,502 INFO L225 Difference]: With dead ends: 48 [2019-11-28 17:57:19,503 INFO L226 Difference]: Without dead ends: 44 [2019-11-28 17:57:19,503 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:57:19,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-28 17:57:19,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2019-11-28 17:57:19,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-28 17:57:19,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 64 transitions. [2019-11-28 17:57:19,510 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 64 transitions. Word has length 14 [2019-11-28 17:57:19,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:19,511 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 64 transitions. [2019-11-28 17:57:19,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 17:57:19,511 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 64 transitions. [2019-11-28 17:57:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 17:57:19,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:19,513 INFO L410 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:19,714 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:19,715 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:19,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:19,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1140832998, now seen corresponding path program 8 times [2019-11-28 17:57:19,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:19,716 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777311137] [2019-11-28 17:57:19,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:19,803 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777311137] [2019-11-28 17:57:19,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997258676] [2019-11-28 17:57:19,804 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2019-11-28 17:57:19,857 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:57:19,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:19,858 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 17:57:19,859 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 17:57:19,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:19,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-28 17:57:19,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480231283] [2019-11-28 17:57:19,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 17:57:19,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:19,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 17:57:19,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:57:19,877 INFO L87 Difference]: Start difference. First operand 31 states and 64 transitions. Second operand 11 states. [2019-11-28 17:57:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:20,035 INFO L93 Difference]: Finished difference Result 53 states and 108 transitions. [2019-11-28 17:57:20,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 17:57:20,036 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2019-11-28 17:57:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:20,036 INFO L225 Difference]: With dead ends: 53 [2019-11-28 17:57:20,037 INFO L226 Difference]: Without dead ends: 48 [2019-11-28 17:57:20,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:57:20,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-28 17:57:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2019-11-28 17:57:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-28 17:57:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 84 transitions. [2019-11-28 17:57:20,042 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 84 transitions. Word has length 15 [2019-11-28 17:57:20,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:20,043 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 84 transitions. [2019-11-28 17:57:20,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 17:57:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 84 transitions. [2019-11-28 17:57:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 17:57:20,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:20,044 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:20,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:20,246 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:20,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:20,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1006092315, now seen corresponding path program 9 times [2019-11-28 17:57:20,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:20,247 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904533702] [2019-11-28 17:57:20,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:20,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:20,390 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904533702] [2019-11-28 17:57:20,391 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136287112] [2019-11-28 17:57:20,391 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:20,478 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-28 17:57:20,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:20,479 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 17:57:20,481 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:20,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:20,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-28 17:57:20,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371885368] [2019-11-28 17:57:20,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 17:57:20,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:20,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 17:57:20,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:57:20,504 INFO L87 Difference]: Start difference. First operand 41 states and 84 transitions. Second operand 13 states. [2019-11-28 17:57:20,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:20,766 INFO L93 Difference]: Finished difference Result 52 states and 106 transitions. [2019-11-28 17:57:20,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 17:57:20,766 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-11-28 17:57:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:20,767 INFO L225 Difference]: With dead ends: 52 [2019-11-28 17:57:20,767 INFO L226 Difference]: Without dead ends: 42 [2019-11-28 17:57:20,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2019-11-28 17:57:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-28 17:57:20,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2019-11-28 17:57:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-28 17:57:20,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 58 transitions. [2019-11-28 17:57:20,774 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 58 transitions. Word has length 16 [2019-11-28 17:57:20,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:20,775 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 58 transitions. [2019-11-28 17:57:20,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 17:57:20,775 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 58 transitions. [2019-11-28 17:57:20,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-28 17:57:20,780 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:20,780 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:20,983 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:20,984 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:20,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:20,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1773777041, now seen corresponding path program 10 times [2019-11-28 17:57:20,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:20,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109400972] [2019-11-28 17:57:20,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:21,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109400972] [2019-11-28 17:57:21,108 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653131092] [2019-11-28 17:57:21,108 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:21,166 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:57:21,166 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:21,167 INFO L264 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 17:57:21,168 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:21,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:21,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-28 17:57:21,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55927272] [2019-11-28 17:57:21,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 17:57:21,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:21,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 17:57:21,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:57:21,191 INFO L87 Difference]: Start difference. First operand 28 states and 58 transitions. Second operand 13 states. [2019-11-28 17:57:21,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:21,436 INFO L93 Difference]: Finished difference Result 49 states and 100 transitions. [2019-11-28 17:57:21,437 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 17:57:21,437 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2019-11-28 17:57:21,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:21,437 INFO L225 Difference]: With dead ends: 49 [2019-11-28 17:57:21,438 INFO L226 Difference]: Without dead ends: 43 [2019-11-28 17:57:21,438 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2019-11-28 17:57:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-28 17:57:21,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2019-11-28 17:57:21,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-28 17:57:21,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 64 transitions. [2019-11-28 17:57:21,442 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 64 transitions. Word has length 16 [2019-11-28 17:57:21,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:21,443 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 64 transitions. [2019-11-28 17:57:21,443 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 17:57:21,443 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 64 transitions. [2019-11-28 17:57:21,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-28 17:57:21,444 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:21,444 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:21,650 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:21,650 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:21,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:21,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1124090998, now seen corresponding path program 11 times [2019-11-28 17:57:21,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:21,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131928759] [2019-11-28 17:57:21,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:21,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:21,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131928759] [2019-11-28 17:57:21,800 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683256393] [2019-11-28 17:57:21,800 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:21,878 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-28 17:57:21,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:21,880 INFO L264 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 17:57:21,885 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:21,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:57:21,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-28 17:57:21,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919724229] [2019-11-28 17:57:21,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 17:57:21,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:21,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 17:57:21,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:57:21,940 INFO L87 Difference]: Start difference. First operand 31 states and 64 transitions. Second operand 14 states. [2019-11-28 17:57:22,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:22,150 INFO L93 Difference]: Finished difference Result 47 states and 96 transitions. [2019-11-28 17:57:22,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 17:57:22,151 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2019-11-28 17:57:22,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:22,152 INFO L225 Difference]: With dead ends: 47 [2019-11-28 17:57:22,152 INFO L226 Difference]: Without dead ends: 44 [2019-11-28 17:57:22,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2019-11-28 17:57:22,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-28 17:57:22,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-28 17:57:22,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-28 17:57:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 90 transitions. [2019-11-28 17:57:22,164 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 90 transitions. Word has length 17 [2019-11-28 17:57:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:22,165 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 90 transitions. [2019-11-28 17:57:22,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 17:57:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 90 transitions. [2019-11-28 17:57:22,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 17:57:22,166 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:22,167 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:22,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:22,371 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:22,372 INFO L82 PathProgramCache]: Analyzing trace with hash 487082627, now seen corresponding path program 12 times [2019-11-28 17:57:22,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:22,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091055955] [2019-11-28 17:57:22,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:22,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:22,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091055955] [2019-11-28 17:57:22,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832370829] [2019-11-28 17:57:22,446 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:22,537 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-28 17:57:22,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:57:22,538 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 17:57:22,540 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:22,553 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:22,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 17:57:22,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2019-11-28 17:57:22,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911337247] [2019-11-28 17:57:22,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:57:22,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:22,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:57:22,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:57:22,557 INFO L87 Difference]: Start difference. First operand 44 states and 90 transitions. Second operand 8 states. [2019-11-28 17:57:22,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:22,578 INFO L93 Difference]: Finished difference Result 96 states and 167 transitions. [2019-11-28 17:57:22,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:57:22,578 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-28 17:57:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:22,579 INFO L225 Difference]: With dead ends: 96 [2019-11-28 17:57:22,579 INFO L226 Difference]: Without dead ends: 30 [2019-11-28 17:57:22,580 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:57:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-28 17:57:22,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-28 17:57:22,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-28 17:57:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2019-11-28 17:57:22,582 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 18 [2019-11-28 17:57:22,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:22,583 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2019-11-28 17:57:22,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:57:22,584 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2019-11-28 17:57:22,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-28 17:57:22,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:57:22,585 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:57:22,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:22,792 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:57:22,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:57:22,793 INFO L82 PathProgramCache]: Analyzing trace with hash 502282183, now seen corresponding path program 13 times [2019-11-28 17:57:22,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:57:22,794 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216865625] [2019-11-28 17:57:22,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:57:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:22,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216865625] [2019-11-28 17:57:22,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773778431] [2019-11-28 17:57:22,868 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:57:22,917 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 17:57:22,918 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:57:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 17:57:22,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 17:57:22,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 9 [2019-11-28 17:57:22,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231442088] [2019-11-28 17:57:22,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:57:22,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:57:22,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:57:22,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:57:22,932 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 8 states. [2019-11-28 17:57:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:57:22,942 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2019-11-28 17:57:22,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:57:22,942 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-28 17:57:22,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:57:22,943 INFO L225 Difference]: With dead ends: 46 [2019-11-28 17:57:22,943 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:57:22,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:57:22,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:57:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:57:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:57:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:57:22,944 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2019-11-28 17:57:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:57:22,945 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:57:22,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:57:22,945 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:57:22,945 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:57:23,145 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:57:23,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:57:23 BasicIcfg [2019-11-28 17:57:23,151 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:57:23,151 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:57:23,151 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:57:23,151 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:57:23,152 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:57:13" (3/4) ... [2019-11-28 17:57:23,155 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:57:23,163 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2019-11-28 17:57:23,166 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2019-11-28 17:57:23,169 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-11-28 17:57:23,169 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-28 17:57:23,170 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 17:57:23,211 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:57:23,211 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:57:23,213 INFO L168 Benchmark]: Toolchain (without parser) took 10496.95 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 300.9 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -182.7 MB). Peak memory consumption was 118.3 MB. Max. memory is 11.5 GB. [2019-11-28 17:57:23,214 INFO L168 Benchmark]: CDTParser took 0.87 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:57:23,214 INFO L168 Benchmark]: CACSL2BoogieTranslator took 718.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -152.3 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2019-11-28 17:57:23,215 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-28 17:57:23,215 INFO L168 Benchmark]: Boogie Preprocessor took 28.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:57:23,216 INFO L168 Benchmark]: RCFGBuilder took 445.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2019-11-28 17:57:23,217 INFO L168 Benchmark]: TraceAbstraction took 9187.90 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 162.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -61.3 MB). Peak memory consumption was 100.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:57:23,217 INFO L168 Benchmark]: Witness Printer took 60.31 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:57:23,220 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.87 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 718.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 955.0 MB in the beginning and 1.1 GB in the end (delta: -152.3 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 50.82 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 28.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 445.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9187.90 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 162.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -61.3 MB). Peak memory consumption was 100.7 MB. Max. memory is 11.5 GB. * Witness Printer took 60.31 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 53 ProgramPointsBefore, 16 ProgramPointsAfterwards, 51 TransitionsBefore, 14 TransitionsAfterwards, 740 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 3 ChoiceCompositions, 380 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 604 CheckedPairsTotal, 41 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Result: SAFE, OverallTime: 9.0s, OverallIterations: 15, TraceHistogramMax: 6, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 206 SDtfs, 392 SDslu, 385 SDs, 0 SdLazy, 394 SolverSat, 244 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 325 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=13, 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, 15 MinimizatonAttempts, 80 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 367 NumberOfCodeBlocks, 367 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 340 ConstructedInterpolants, 0 QuantifiedInterpolants, 14424 SizeOfPredicates, 55 NumberOfNonLiveVariables, 1261 ConjunctsInSsa, 141 ConjunctsInUnsatCore, 27 InterpolantComputations, 5 PerfectInterpolantSequences, 94/288 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...