./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer --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 58249a19aaa2ca34edeb532954b326c7f760e66f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-01 18:19:28,453 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 18:19:28,454 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 18:19:28,460 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 18:19:28,461 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 18:19:28,461 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 18:19:28,462 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 18:19:28,463 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 18:19:28,464 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 18:19:28,465 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 18:19:28,465 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 18:19:28,466 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 18:19:28,466 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 18:19:28,467 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 18:19:28,467 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 18:19:28,468 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 18:19:28,468 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 18:19:28,469 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 18:19:28,470 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 18:19:28,470 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 18:19:28,471 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 18:19:28,471 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 18:19:28,472 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 18:19:28,472 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 18:19:28,472 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 18:19:28,473 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 18:19:28,473 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 18:19:28,474 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 18:19:28,474 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 18:19:28,475 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 18:19:28,475 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 18:19:28,475 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 18:19:28,476 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 18:19:28,476 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 18:19:28,476 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 18:19:28,477 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 18:19:28,477 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-12-01 18:19:28,486 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 18:19:28,486 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 18:19:28,487 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-01 18:19:28,487 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-01 18:19:28,488 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 18:19:28,488 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 18:19:28,488 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 18:19:28,488 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 18:19:28,488 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-01 18:19:28,489 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 18:19:28,489 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-01 18:19:28,489 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 18:19:28,489 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-01 18:19:28,489 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-01 18:19:28,489 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-01 18:19:28,489 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-01 18:19:28,490 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 18:19:28,490 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 18:19:28,490 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-01 18:19:28,490 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 18:19:28,490 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 18:19:28,490 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-01 18:19:28,491 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-01 18:19:28,491 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-01 18:19:28,491 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 18:19:28,491 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-01 18:19:28,491 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-01 18:19:28,491 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 18:19:28,491 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-01 18:19:28,492 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-01 18:19:28,492 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer 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 -> 58249a19aaa2ca34edeb532954b326c7f760e66f [2018-12-01 18:19:28,515 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 18:19:28,524 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 18:19:28,527 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 18:19:28,528 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 18:19:28,528 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 18:19:28,528 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/../../sv-benchmarks/c/pthread/triangular_true-unreach-call.i [2018-12-01 18:19:28,563 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/data/0c04d98b1/284966145c464395a8e236532edfdc0a/FLAG4403dedd1 [2018-12-01 18:19:28,912 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 18:19:28,912 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/sv-benchmarks/c/pthread/triangular_true-unreach-call.i [2018-12-01 18:19:28,920 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/data/0c04d98b1/284966145c464395a8e236532edfdc0a/FLAG4403dedd1 [2018-12-01 18:19:29,301 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/data/0c04d98b1/284966145c464395a8e236532edfdc0a [2018-12-01 18:19:29,303 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 18:19:29,304 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 18:19:29,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 18:19:29,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 18:19:29,307 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 18:19:29,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 06:19:29" (1/1) ... [2018-12-01 18:19:29,309 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e48869 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:19:29, skipping insertion in model container [2018-12-01 18:19:29,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 06:19:29" (1/1) ... [2018-12-01 18:19:29,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 18:19:29,338 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 18:19:29,504 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 18:19:29,510 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 18:19:29,569 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 18:19:29,596 INFO L195 MainTranslator]: Completed translation [2018-12-01 18:19:29,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:19:29 WrapperNode [2018-12-01 18:19:29,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 18:19:29,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 18:19:29,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 18:19:29,597 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 18:19:29,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:19:29" (1/1) ... [2018-12-01 18:19:29,611 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:19:29" (1/1) ... [2018-12-01 18:19:29,624 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 18:19:29,624 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 18:19:29,624 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 18:19:29,624 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 18:19:29,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:19:29" (1/1) ... [2018-12-01 18:19:29,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:19:29" (1/1) ... [2018-12-01 18:19:29,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:19:29" (1/1) ... [2018-12-01 18:19:29,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:19:29" (1/1) ... [2018-12-01 18:19:29,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:19:29" (1/1) ... [2018-12-01 18:19:29,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:19:29" (1/1) ... [2018-12-01 18:19:29,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:19:29" (1/1) ... [2018-12-01 18:19:29,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 18:19:29,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 18:19:29,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 18:19:29,640 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 18:19:29,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:19:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/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 [2018-12-01 18:19:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-01 18:19:29,673 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-12-01 18:19:29,673 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-12-01 18:19:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-12-01 18:19:29,674 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-12-01 18:19:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-01 18:19:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-12-01 18:19:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-01 18:19:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-12-01 18:19:29,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 18:19:29,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 18:19:29,675 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-01 18:19:29,827 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 18:19:29,827 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-01 18:19:29,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 06:19:29 BoogieIcfgContainer [2018-12-01 18:19:29,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 18:19:29,828 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-01 18:19:29,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-01 18:19:29,830 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-01 18:19:29,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 06:19:29" (1/3) ... [2018-12-01 18:19:29,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9f0a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 06:19:29, skipping insertion in model container [2018-12-01 18:19:29,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 06:19:29" (2/3) ... [2018-12-01 18:19:29,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9f0a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 06:19:29, skipping insertion in model container [2018-12-01 18:19:29,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 06:19:29" (3/3) ... [2018-12-01 18:19:29,832 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular_true-unreach-call.i [2018-12-01 18:19:29,850 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,850 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,850 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,850 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,850 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,850 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,851 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,851 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,851 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,851 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,851 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,851 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,851 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,851 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,851 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,852 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,852 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,852 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,852 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,852 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,852 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,852 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,852 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,852 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,852 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,853 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,853 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,853 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-01 18:19:29,858 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-01 18:19:29,858 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-01 18:19:29,862 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-01 18:19:29,871 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-01 18:19:29,885 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 18:19:29,885 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-01 18:19:29,885 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-01 18:19:29,885 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-01 18:19:29,885 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 18:19:29,886 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 18:19:29,886 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-01 18:19:29,886 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 18:19:29,886 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-01 18:19:29,890 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-12-01 18:19:29,920 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-12-01 18:19:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-12-01 18:19:29,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-01 18:19:29,927 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:29,928 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:29,929 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:29,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:29,933 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-12-01 18:19:29,934 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:29,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:29,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:29,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:19:29,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:30,070 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 18:19:30,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 18:19:30,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 18:19:30,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 18:19:30,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-01 18:19:30,086 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-12-01 18:19:30,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:30,171 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-12-01 18:19:30,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 18:19:30,173 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-01 18:19:30,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:30,183 INFO L225 Difference]: With dead ends: 1411 [2018-12-01 18:19:30,184 INFO L226 Difference]: Without dead ends: 322 [2018-12-01 18:19:30,185 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-01 18:19:30,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-12-01 18:19:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-12-01 18:19:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-12-01 18:19:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-12-01 18:19:30,217 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-12-01 18:19:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:30,218 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-12-01 18:19:30,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 18:19:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-12-01 18:19:30,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-01 18:19:30,218 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:30,218 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:30,219 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:30,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:30,219 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-12-01 18:19:30,219 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:30,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:30,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:30,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:19:30,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:30,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:30,269 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 18:19:30,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 18:19:30,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-01 18:19:30,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 18:19:30,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-01 18:19:30,271 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-12-01 18:19:30,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:30,303 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-12-01 18:19:30,303 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-01 18:19:30,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-01 18:19:30,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:30,304 INFO L225 Difference]: With dead ends: 411 [2018-12-01 18:19:30,304 INFO L226 Difference]: Without dead ends: 290 [2018-12-01 18:19:30,305 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-01 18:19:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-12-01 18:19:30,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-12-01 18:19:30,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-12-01 18:19:30,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-12-01 18:19:30,313 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-12-01 18:19:30,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:30,313 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-12-01 18:19:30,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-01 18:19:30,313 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-12-01 18:19:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-01 18:19:30,314 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:30,314 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:30,314 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:30,314 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:30,314 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-12-01 18:19:30,315 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:30,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:30,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:30,318 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:19:30,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:30,371 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 18:19:30,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-01 18:19:30,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 18:19:30,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 18:19:30,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-01 18:19:30,372 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-12-01 18:19:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:30,414 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-12-01 18:19:30,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 18:19:30,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-01 18:19:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:30,415 INFO L225 Difference]: With dead ends: 437 [2018-12-01 18:19:30,416 INFO L226 Difference]: Without dead ends: 309 [2018-12-01 18:19:30,416 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-01 18:19:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-12-01 18:19:30,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-12-01 18:19:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-01 18:19:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-12-01 18:19:30,422 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-12-01 18:19:30,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:30,422 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-12-01 18:19:30,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 18:19:30,422 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-12-01 18:19:30,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-01 18:19:30,423 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:30,423 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:30,423 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:30,423 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:30,423 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-12-01 18:19:30,423 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:30,423 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:30,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:30,425 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:19:30,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:30,466 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 18:19:30,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-01 18:19:30,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-01 18:19:30,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 18:19:30,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-01 18:19:30,467 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-12-01 18:19:30,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:30,509 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-12-01 18:19:30,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 18:19:30,509 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-01 18:19:30,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:30,510 INFO L225 Difference]: With dead ends: 456 [2018-12-01 18:19:30,510 INFO L226 Difference]: Without dead ends: 319 [2018-12-01 18:19:30,511 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-01 18:19:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-01 18:19:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-01 18:19:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-01 18:19:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-12-01 18:19:30,517 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-12-01 18:19:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:30,518 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-12-01 18:19:30,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-01 18:19:30,518 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-12-01 18:19:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-01 18:19:30,519 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:30,519 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:30,519 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:30,519 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:30,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-12-01 18:19:30,519 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:30,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:30,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:30,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:19:30,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:30,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:30,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:30,562 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:30,572 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:19:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:30,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:30,638 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:30,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-01 18:19:30,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-01 18:19:30,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-01 18:19:30,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-01 18:19:30,639 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-12-01 18:19:30,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:30,720 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-12-01 18:19:30,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 18:19:30,720 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-12-01 18:19:30,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:30,721 INFO L225 Difference]: With dead ends: 466 [2018-12-01 18:19:30,722 INFO L226 Difference]: Without dead ends: 335 [2018-12-01 18:19:30,722 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-12-01 18:19:30,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-12-01 18:19:30,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2018-12-01 18:19:30,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-12-01 18:19:30,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 734 transitions. [2018-12-01 18:19:30,727 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 734 transitions. Word has length 29 [2018-12-01 18:19:30,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:30,728 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 734 transitions. [2018-12-01 18:19:30,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-01 18:19:30,728 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 734 transitions. [2018-12-01 18:19:30,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-01 18:19:30,728 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:30,729 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:30,729 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:30,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:30,729 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-12-01 18:19:30,729 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:30,729 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:30,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:30,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:19:30,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:30,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:30,772 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:30,781 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:19:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:30,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:30,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:30,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-12-01 18:19:30,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-12-01 18:19:30,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-01 18:19:30,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-12-01 18:19:30,839 INFO L87 Difference]: Start difference. First operand 300 states and 734 transitions. Second operand 8 states. [2018-12-01 18:19:30,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:30,883 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-12-01 18:19:30,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-12-01 18:19:30,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-12-01 18:19:30,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:30,885 INFO L225 Difference]: With dead ends: 482 [2018-12-01 18:19:30,885 INFO L226 Difference]: Without dead ends: 351 [2018-12-01 18:19:30,885 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-12-01 18:19:30,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-12-01 18:19:30,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-12-01 18:19:30,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-12-01 18:19:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-12-01 18:19:30,890 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-12-01 18:19:30,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:30,891 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-12-01 18:19:30,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-12-01 18:19:30,891 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-12-01 18:19:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-01 18:19:30,891 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:30,892 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:30,892 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:30,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:30,892 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 1 times [2018-12-01 18:19:30,892 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:30,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:30,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:30,894 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:19:30,894 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:30,957 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:30,957 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:30,957 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:30,965 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:19:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:30,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:31,023 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:31,023 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-01 18:19:31,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 18:19:31,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 18:19:31,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-12-01 18:19:31,024 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-12-01 18:19:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:31,093 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-12-01 18:19:31,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-01 18:19:31,093 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-01 18:19:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:31,094 INFO L225 Difference]: With dead ends: 498 [2018-12-01 18:19:31,094 INFO L226 Difference]: Without dead ends: 367 [2018-12-01 18:19:31,094 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-12-01 18:19:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-12-01 18:19:31,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 316. [2018-12-01 18:19:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-12-01 18:19:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 766 transitions. [2018-12-01 18:19:31,099 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 766 transitions. Word has length 33 [2018-12-01 18:19:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:31,099 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 766 transitions. [2018-12-01 18:19:31,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 18:19:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 766 transitions. [2018-12-01 18:19:31,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-12-01 18:19:31,099 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:31,099 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:31,099 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:31,100 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:31,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1110322378, now seen corresponding path program 2 times [2018-12-01 18:19:31,100 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:31,100 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:31,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:31,101 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:19:31,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:31,137 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:31,137 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:31,145 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 18:19:31,158 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 18:19:31,158 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:19:31,160 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:31,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:31,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:31,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-12-01 18:19:31,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-12-01 18:19:31,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-12-01 18:19:31,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-12-01 18:19:31,199 INFO L87 Difference]: Start difference. First operand 316 states and 766 transitions. Second operand 9 states. [2018-12-01 18:19:31,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:31,271 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-12-01 18:19:31,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-01 18:19:31,272 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-12-01 18:19:31,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:31,272 INFO L225 Difference]: With dead ends: 514 [2018-12-01 18:19:31,272 INFO L226 Difference]: Without dead ends: 383 [2018-12-01 18:19:31,273 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-12-01 18:19:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-12-01 18:19:31,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-12-01 18:19:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-12-01 18:19:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-12-01 18:19:31,277 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-12-01 18:19:31,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:31,277 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-12-01 18:19:31,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-12-01 18:19:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-12-01 18:19:31,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-01 18:19:31,278 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:31,278 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:31,279 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:31,279 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:31,279 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 3 times [2018-12-01 18:19:31,279 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:31,279 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:31,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:31,281 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:19:31,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:31,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:31,331 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:31,340 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 18:19:31,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-12-01 18:19:31,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:19:31,354 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:31,389 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:31,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-01 18:19:31,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-01 18:19:31,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-01 18:19:31,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-12-01 18:19:31,389 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-12-01 18:19:31,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:31,463 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-12-01 18:19:31,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-12-01 18:19:31,463 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-12-01 18:19:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:31,465 INFO L225 Difference]: With dead ends: 530 [2018-12-01 18:19:31,465 INFO L226 Difference]: Without dead ends: 399 [2018-12-01 18:19:31,465 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2018-12-01 18:19:31,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-12-01 18:19:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 332. [2018-12-01 18:19:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-12-01 18:19:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 798 transitions. [2018-12-01 18:19:31,472 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 798 transitions. Word has length 37 [2018-12-01 18:19:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:31,472 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 798 transitions. [2018-12-01 18:19:31,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-01 18:19:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 798 transitions. [2018-12-01 18:19:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-12-01 18:19:31,473 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:31,473 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:31,473 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:31,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:31,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1649592435, now seen corresponding path program 4 times [2018-12-01 18:19:31,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:31,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:31,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:31,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:19:31,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:31,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:31,539 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:31,547 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 18:19:31,557 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 18:19:31,557 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:19:31,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:31,584 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:31,584 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-12-01 18:19:31,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-12-01 18:19:31,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-01 18:19:31,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-12-01 18:19:31,585 INFO L87 Difference]: Start difference. First operand 332 states and 798 transitions. Second operand 10 states. [2018-12-01 18:19:31,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:31,649 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-12-01 18:19:31,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-12-01 18:19:31,649 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-12-01 18:19:31,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:31,650 INFO L225 Difference]: With dead ends: 546 [2018-12-01 18:19:31,650 INFO L226 Difference]: Without dead ends: 415 [2018-12-01 18:19:31,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-12-01 18:19:31,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-12-01 18:19:31,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-12-01 18:19:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-12-01 18:19:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-12-01 18:19:31,654 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-12-01 18:19:31,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:31,654 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-12-01 18:19:31,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-12-01 18:19:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-12-01 18:19:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-01 18:19:31,655 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:31,655 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:31,655 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:31,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:31,655 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 5 times [2018-12-01 18:19:31,655 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:31,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:31,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:31,657 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:19:31,657 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:31,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:31,732 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:31,741 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 18:19:31,753 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-12-01 18:19:31,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:19:31,754 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:31,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:31,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-01 18:19:31,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-01 18:19:31,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-01 18:19:31,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-01 18:19:31,797 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-12-01 18:19:31,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:31,912 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-12-01 18:19:31,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-01 18:19:31,912 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-01 18:19:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:31,913 INFO L225 Difference]: With dead ends: 562 [2018-12-01 18:19:31,913 INFO L226 Difference]: Without dead ends: 431 [2018-12-01 18:19:31,913 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-12-01 18:19:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-12-01 18:19:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 348. [2018-12-01 18:19:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-12-01 18:19:31,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 830 transitions. [2018-12-01 18:19:31,917 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 830 transitions. Word has length 41 [2018-12-01 18:19:31,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:31,917 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 830 transitions. [2018-12-01 18:19:31,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-01 18:19:31,918 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 830 transitions. [2018-12-01 18:19:31,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-12-01 18:19:31,918 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:31,918 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:31,918 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:31,918 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:31,918 INFO L82 PathProgramCache]: Analyzing trace with hash 449750186, now seen corresponding path program 6 times [2018-12-01 18:19:31,918 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:31,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:31,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:31,919 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:19:31,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:31,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:31,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:31,966 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:31,966 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:31,976 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 18:19:31,989 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-12-01 18:19:31,989 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:19:31,990 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:32,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:32,025 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:32,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-12-01 18:19:32,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-01 18:19:32,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-01 18:19:32,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-12-01 18:19:32,025 INFO L87 Difference]: Start difference. First operand 348 states and 830 transitions. Second operand 11 states. [2018-12-01 18:19:32,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:32,112 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-12-01 18:19:32,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-01 18:19:32,112 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-12-01 18:19:32,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:32,113 INFO L225 Difference]: With dead ends: 578 [2018-12-01 18:19:32,113 INFO L226 Difference]: Without dead ends: 447 [2018-12-01 18:19:32,113 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-12-01 18:19:32,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-12-01 18:19:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-12-01 18:19:32,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-12-01 18:19:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-12-01 18:19:32,117 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-12-01 18:19:32,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:32,117 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-12-01 18:19:32,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-01 18:19:32,117 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-12-01 18:19:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-01 18:19:32,117 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:32,117 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:32,118 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:32,118 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:32,118 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 7 times [2018-12-01 18:19:32,118 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:32,118 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:32,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:32,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:19:32,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:32,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:32,178 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:32,186 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:19:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:32,197 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:32,236 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:32,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-01 18:19:32,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-01 18:19:32,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-01 18:19:32,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-01 18:19:32,236 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-12-01 18:19:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:32,332 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-12-01 18:19:32,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-01 18:19:32,332 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-12-01 18:19:32,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:32,333 INFO L225 Difference]: With dead ends: 594 [2018-12-01 18:19:32,333 INFO L226 Difference]: Without dead ends: 463 [2018-12-01 18:19:32,333 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2018-12-01 18:19:32,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-12-01 18:19:32,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2018-12-01 18:19:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-12-01 18:19:32,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 862 transitions. [2018-12-01 18:19:32,337 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 862 transitions. Word has length 45 [2018-12-01 18:19:32,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:32,337 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 862 transitions. [2018-12-01 18:19:32,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-01 18:19:32,337 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 862 transitions. [2018-12-01 18:19:32,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-01 18:19:32,337 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:32,337 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:32,338 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:32,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:32,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1081163923, now seen corresponding path program 8 times [2018-12-01 18:19:32,338 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:32,338 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:32,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:32,339 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:19:32,339 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:32,381 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:32,381 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:32,388 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 18:19:32,399 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 18:19:32,399 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:19:32,401 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:32,440 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:32,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-12-01 18:19:32,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-12-01 18:19:32,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-12-01 18:19:32,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-12-01 18:19:32,441 INFO L87 Difference]: Start difference. First operand 364 states and 862 transitions. Second operand 12 states. [2018-12-01 18:19:32,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:32,526 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-12-01 18:19:32,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-12-01 18:19:32,526 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-12-01 18:19:32,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:32,527 INFO L225 Difference]: With dead ends: 610 [2018-12-01 18:19:32,527 INFO L226 Difference]: Without dead ends: 479 [2018-12-01 18:19:32,528 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2018-12-01 18:19:32,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-12-01 18:19:32,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-12-01 18:19:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-12-01 18:19:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-12-01 18:19:32,532 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-12-01 18:19:32,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:32,532 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-12-01 18:19:32,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-12-01 18:19:32,532 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-12-01 18:19:32,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-01 18:19:32,532 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:32,532 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:32,532 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:32,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:32,533 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 9 times [2018-12-01 18:19:32,533 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:32,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:32,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:32,534 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:19:32,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:32,591 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:32,592 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:32,598 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 18:19:32,614 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-12-01 18:19:32,614 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:19:32,615 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:32,635 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:32,649 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:32,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-01 18:19:32,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-01 18:19:32,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-01 18:19:32,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-12-01 18:19:32,650 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-12-01 18:19:32,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:32,783 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-12-01 18:19:32,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-01 18:19:32,783 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-12-01 18:19:32,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:32,784 INFO L225 Difference]: With dead ends: 626 [2018-12-01 18:19:32,784 INFO L226 Difference]: Without dead ends: 495 [2018-12-01 18:19:32,785 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2018-12-01 18:19:32,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-12-01 18:19:32,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 380. [2018-12-01 18:19:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-12-01 18:19:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 894 transitions. [2018-12-01 18:19:32,789 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 894 transitions. Word has length 49 [2018-12-01 18:19:32,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:32,789 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 894 transitions. [2018-12-01 18:19:32,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-01 18:19:32,790 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 894 transitions. [2018-12-01 18:19:32,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-12-01 18:19:32,790 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:32,790 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:32,790 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:32,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:32,791 INFO L82 PathProgramCache]: Analyzing trace with hash -555139958, now seen corresponding path program 10 times [2018-12-01 18:19:32,791 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:32,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:32,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:32,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:19:32,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:32,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:32,844 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:32,844 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:32,852 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 18:19:32,864 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 18:19:32,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:19:32,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:32,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:32,909 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-12-01 18:19:32,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-12-01 18:19:32,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-12-01 18:19:32,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-12-01 18:19:32,910 INFO L87 Difference]: Start difference. First operand 380 states and 894 transitions. Second operand 13 states. [2018-12-01 18:19:33,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:33,027 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-12-01 18:19:33,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-12-01 18:19:33,028 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-12-01 18:19:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:33,029 INFO L225 Difference]: With dead ends: 642 [2018-12-01 18:19:33,029 INFO L226 Difference]: Without dead ends: 511 [2018-12-01 18:19:33,030 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2018-12-01 18:19:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-12-01 18:19:33,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-12-01 18:19:33,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-12-01 18:19:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-12-01 18:19:33,035 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-12-01 18:19:33,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:33,035 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-12-01 18:19:33,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-12-01 18:19:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-12-01 18:19:33,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-01 18:19:33,036 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:33,036 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:33,036 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:33,037 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:33,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 11 times [2018-12-01 18:19:33,037 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:33,037 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:33,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:33,038 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:19:33,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:33,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:33,103 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:33,103 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:33,115 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-01 18:19:33,127 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-12-01 18:19:33,127 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:19:33,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:33,155 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:33,155 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-01 18:19:33,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-01 18:19:33,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-01 18:19:33,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-12-01 18:19:33,156 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-12-01 18:19:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:33,263 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-12-01 18:19:33,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-01 18:19:33,264 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-12-01 18:19:33,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:33,265 INFO L225 Difference]: With dead ends: 658 [2018-12-01 18:19:33,265 INFO L226 Difference]: Without dead ends: 527 [2018-12-01 18:19:33,266 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-12-01 18:19:33,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-12-01 18:19:33,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2018-12-01 18:19:33,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-12-01 18:19:33,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2018-12-01 18:19:33,270 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 53 [2018-12-01 18:19:33,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:33,270 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2018-12-01 18:19:33,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-01 18:19:33,270 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2018-12-01 18:19:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-12-01 18:19:33,271 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:33,271 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:33,271 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:33,271 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:33,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1121609549, now seen corresponding path program 12 times [2018-12-01 18:19:33,271 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:33,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:33,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:33,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:19:33,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:33,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:33,334 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:33,341 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-01 18:19:33,354 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-12-01 18:19:33,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:19:33,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:33,382 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:33,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-12-01 18:19:33,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-12-01 18:19:33,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-12-01 18:19:33,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-12-01 18:19:33,383 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2018-12-01 18:19:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:33,499 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-12-01 18:19:33,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-01 18:19:33,499 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-12-01 18:19:33,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:33,500 INFO L225 Difference]: With dead ends: 674 [2018-12-01 18:19:33,501 INFO L226 Difference]: Without dead ends: 543 [2018-12-01 18:19:33,501 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2018-12-01 18:19:33,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-12-01 18:19:33,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-12-01 18:19:33,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-12-01 18:19:33,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-12-01 18:19:33,506 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-12-01 18:19:33,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:33,506 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-12-01 18:19:33,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-12-01 18:19:33,506 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-12-01 18:19:33,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-01 18:19:33,507 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:33,507 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:33,508 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:33,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:33,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 13 times [2018-12-01 18:19:33,508 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:33,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:33,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:33,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:19:33,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:33,573 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:33,573 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:33,580 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:19:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:33,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:33,622 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:33,622 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-12-01 18:19:33,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-01 18:19:33,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-01 18:19:33,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-12-01 18:19:33,623 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-12-01 18:19:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:33,761 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-12-01 18:19:33,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-01 18:19:33,761 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-01 18:19:33,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:33,762 INFO L225 Difference]: With dead ends: 690 [2018-12-01 18:19:33,762 INFO L226 Difference]: Without dead ends: 559 [2018-12-01 18:19:33,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2018-12-01 18:19:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-12-01 18:19:33,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 412. [2018-12-01 18:19:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-12-01 18:19:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 958 transitions. [2018-12-01 18:19:33,766 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 958 transitions. Word has length 57 [2018-12-01 18:19:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:33,766 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 958 transitions. [2018-12-01 18:19:33,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-01 18:19:33,766 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 958 transitions. [2018-12-01 18:19:33,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-01 18:19:33,766 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:33,767 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:33,767 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:33,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:33,767 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 14 times [2018-12-01 18:19:33,767 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:33,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:33,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:33,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 18:19:33,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:33,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:33,828 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:33,835 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 18:19:33,845 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 18:19:33,845 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:19:33,846 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:33,879 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 18:19:33,879 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-12-01 18:19:33,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-01 18:19:33,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-01 18:19:33,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-12-01 18:19:33,880 INFO L87 Difference]: Start difference. First operand 412 states and 958 transitions. Second operand 15 states. [2018-12-01 18:19:34,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:34,016 INFO L93 Difference]: Finished difference Result 706 states and 1595 transitions. [2018-12-01 18:19:34,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-01 18:19:34,016 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-12-01 18:19:34,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:34,017 INFO L225 Difference]: With dead ends: 706 [2018-12-01 18:19:34,017 INFO L226 Difference]: Without dead ends: 575 [2018-12-01 18:19:34,017 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2018-12-01 18:19:34,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2018-12-01 18:19:34,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 575. [2018-12-01 18:19:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2018-12-01 18:19:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1284 transitions. [2018-12-01 18:19:34,026 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1284 transitions. Word has length 57 [2018-12-01 18:19:34,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:34,026 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1284 transitions. [2018-12-01 18:19:34,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-01 18:19:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1284 transitions. [2018-12-01 18:19:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-01 18:19:34,027 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:34,027 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:34,027 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:34,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:34,027 INFO L82 PathProgramCache]: Analyzing trace with hash -21031161, now seen corresponding path program 15 times [2018-12-01 18:19:34,027 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:34,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:34,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:34,028 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:19:34,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 60 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:34,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:34,087 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:34,094 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 18:19:34,109 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-12-01 18:19:34,109 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:19:34,110 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:34,140 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-01 18:19:34,140 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2018-12-01 18:19:34,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-01 18:19:34,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-01 18:19:34,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-12-01 18:19:34,140 INFO L87 Difference]: Start difference. First operand 575 states and 1284 transitions. Second operand 15 states. [2018-12-01 18:19:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:34,223 INFO L93 Difference]: Finished difference Result 1199 states and 2426 transitions. [2018-12-01 18:19:34,223 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-01 18:19:34,223 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2018-12-01 18:19:34,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:34,224 INFO L225 Difference]: With dead ends: 1199 [2018-12-01 18:19:34,224 INFO L226 Difference]: Without dead ends: 407 [2018-12-01 18:19:34,224 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2018-12-01 18:19:34,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2018-12-01 18:19:34,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2018-12-01 18:19:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2018-12-01 18:19:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 897 transitions. [2018-12-01 18:19:34,227 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 897 transitions. Word has length 61 [2018-12-01 18:19:34,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:34,227 INFO L480 AbstractCegarLoop]: Abstraction has 407 states and 897 transitions. [2018-12-01 18:19:34,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-01 18:19:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 897 transitions. [2018-12-01 18:19:34,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-12-01 18:19:34,228 INFO L394 BasicCegarLoop]: Found error trace [2018-12-01 18:19:34,228 INFO L402 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 18:19:34,228 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-01 18:19:34,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 18:19:34,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1418711251, now seen corresponding path program 16 times [2018-12-01 18:19:34,228 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 18:19:34,228 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 18:19:34,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:34,229 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 18:19:34,229 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 18:19:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 18:19:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:34,285 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 18:19:34,285 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 18:19:34,293 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-01 18:19:34,305 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-01 18:19:34,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 18:19:34,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 18:19:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 18:19:34,334 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-01 18:19:34,334 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2018-12-01 18:19:34,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-12-01 18:19:34,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-12-01 18:19:34,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-12-01 18:19:34,335 INFO L87 Difference]: Start difference. First operand 407 states and 897 transitions. Second operand 15 states. [2018-12-01 18:19:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 18:19:34,422 INFO L93 Difference]: Finished difference Result 563 states and 1005 transitions. [2018-12-01 18:19:34,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-12-01 18:19:34,423 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2018-12-01 18:19:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-01 18:19:34,423 INFO L225 Difference]: With dead ends: 563 [2018-12-01 18:19:34,423 INFO L226 Difference]: Without dead ends: 0 [2018-12-01 18:19:34,423 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2018-12-01 18:19:34,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-01 18:19:34,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-01 18:19:34,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-01 18:19:34,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-01 18:19:34,424 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2018-12-01 18:19:34,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-01 18:19:34,424 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 18:19:34,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-12-01 18:19:34,424 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-01 18:19:34,424 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-01 18:19:34,427 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-12-01 18:19:34,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 06:19:34 BasicIcfg [2018-12-01 18:19:34,428 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-01 18:19:34,428 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 18:19:34,428 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 18:19:34,428 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 18:19:34,429 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 06:19:29" (3/4) ... [2018-12-01 18:19:34,432 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-01 18:19:34,437 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2018-12-01 18:19:34,437 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2018-12-01 18:19:34,440 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-12-01 18:19:34,440 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-01 18:19:34,440 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-01 18:19:34,466 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_275955fb-ccd7-46dc-9193-1e1dff3407fa/bin-2019/uautomizer/witness.graphml [2018-12-01 18:19:34,466 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 18:19:34,467 INFO L168 Benchmark]: Toolchain (without parser) took 5163.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 197.1 MB). Free memory was 950.6 MB in the beginning and 1.0 GB in the end (delta: -87.6 MB). Peak memory consumption was 109.5 MB. Max. memory is 11.5 GB. [2018-12-01 18:19:34,468 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 18:19:34,468 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.59 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -133.3 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2018-12-01 18:19:34,469 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.59 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 18:19:34,469 INFO L168 Benchmark]: Boogie Preprocessor took 15.89 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-12-01 18:19:34,469 INFO L168 Benchmark]: RCFGBuilder took 187.94 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2018-12-01 18:19:34,469 INFO L168 Benchmark]: TraceAbstraction took 4599.66 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 89.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 16.7 MB). Peak memory consumption was 105.8 MB. Max. memory is 11.5 GB. [2018-12-01 18:19:34,470 INFO L168 Benchmark]: Witness Printer took 37.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2018-12-01 18:19:34,472 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 292.59 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 108.0 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -133.3 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.59 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.89 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 187.94 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.7 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4599.66 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 89.1 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 16.7 MB). Peak memory consumption was 105.8 MB. Max. memory is 11.5 GB. * Witness Printer took 37.91 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 688]: 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 5 procedures, 64 locations, 1 error locations. SAFE Result, 4.5s OverallTime, 22 OverallIterations, 6 TraceHistogramMax, 1.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1339 SDtfs, 4278 SDslu, 5456 SDs, 0 SdLazy, 1062 SolverSat, 471 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1172 GetRequests, 836 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1012occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 738 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 1711 NumberOfCodeBlocks, 1710 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 1671 ConstructedInterpolants, 0 QuantifiedInterpolants, 220155 SizeOfPredicates, 174 NumberOfNonLiveVariables, 2120 ConjunctsInSsa, 227 ConjunctsInUnsatCore, 40 InterpolantComputations, 6 PerfectInterpolantSequences, 253/980 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...