./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/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 85b94be996486a7516ccc33e88e36127bb614ed5 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-16 00:42:36,619 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-16 00:42:36,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-16 00:42:36,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-16 00:42:36,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-16 00:42:36,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-16 00:42:36,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-16 00:42:36,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-16 00:42:36,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-16 00:42:36,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-16 00:42:36,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-16 00:42:36,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-16 00:42:36,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-16 00:42:36,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-16 00:42:36,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-16 00:42:36,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-16 00:42:36,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-16 00:42:36,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-16 00:42:36,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-16 00:42:36,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-16 00:42:36,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-16 00:42:36,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-16 00:42:36,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-16 00:42:36,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-16 00:42:36,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-16 00:42:36,667 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-16 00:42:36,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-16 00:42:36,669 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-16 00:42:36,670 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-16 00:42:36,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-16 00:42:36,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-16 00:42:36,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-16 00:42:36,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-16 00:42:36,675 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-16 00:42:36,677 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-16 00:42:36,677 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-16 00:42:36,678 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-16 00:42:36,678 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-16 00:42:36,678 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-16 00:42:36,681 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-16 00:42:36,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-16 00:42:36,683 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-16 00:42:36,701 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-16 00:42:36,701 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-16 00:42:36,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-16 00:42:36,703 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-16 00:42:36,703 INFO L138 SettingsManager]: * Use SBE=true [2019-11-16 00:42:36,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-16 00:42:36,703 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-16 00:42:36,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-16 00:42:36,704 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-16 00:42:36,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-16 00:42:36,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-16 00:42:36,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-16 00:42:36,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-16 00:42:36,706 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-16 00:42:36,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-16 00:42:36,706 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-16 00:42:36,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-16 00:42:36,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-16 00:42:36,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-16 00:42:36,709 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-16 00:42:36,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-16 00:42:36,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-16 00:42:36,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-16 00:42:36,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-16 00:42:36,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-16 00:42:36,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-16 00:42:36,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-16 00:42:36,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-16 00:42:36,713 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/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 -> 85b94be996486a7516ccc33e88e36127bb614ed5 [2019-11-16 00:42:36,751 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-16 00:42:36,763 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-16 00:42:36,766 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-16 00:42:36,768 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-16 00:42:36,769 INFO L275 PluginConnector]: CDTParser initialized [2019-11-16 00:42:36,769 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longer-2.i [2019-11-16 00:42:36,825 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/data/88054efd3/8f82d7bfaa964f1c8298cfdcd2ea1e34/FLAG7435bc695 [2019-11-16 00:42:37,353 INFO L306 CDTParser]: Found 1 translation units. [2019-11-16 00:42:37,358 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/sv-benchmarks/c/pthread/triangular-longer-2.i [2019-11-16 00:42:37,377 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/data/88054efd3/8f82d7bfaa964f1c8298cfdcd2ea1e34/FLAG7435bc695 [2019-11-16 00:42:37,836 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/data/88054efd3/8f82d7bfaa964f1c8298cfdcd2ea1e34 [2019-11-16 00:42:37,839 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-16 00:42:37,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-16 00:42:37,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-16 00:42:37,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-16 00:42:37,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-16 00:42:37,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:42:37" (1/1) ... [2019-11-16 00:42:37,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56a01417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:37, skipping insertion in model container [2019-11-16 00:42:37,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:42:37" (1/1) ... [2019-11-16 00:42:37,857 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-16 00:42:37,911 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-16 00:42:38,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:42:38,438 INFO L188 MainTranslator]: Completed pre-run [2019-11-16 00:42:38,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-16 00:42:38,560 INFO L192 MainTranslator]: Completed translation [2019-11-16 00:42:38,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:38 WrapperNode [2019-11-16 00:42:38,562 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-16 00:42:38,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-16 00:42:38,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-16 00:42:38,563 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-16 00:42:38,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:38" (1/1) ... [2019-11-16 00:42:38,582 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:38" (1/1) ... [2019-11-16 00:42:38,598 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-16 00:42:38,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-16 00:42:38,599 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-16 00:42:38,599 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-16 00:42:38,605 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:38" (1/1) ... [2019-11-16 00:42:38,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:38" (1/1) ... [2019-11-16 00:42:38,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:38" (1/1) ... [2019-11-16 00:42:38,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:38" (1/1) ... [2019-11-16 00:42:38,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:38" (1/1) ... [2019-11-16 00:42:38,617 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:38" (1/1) ... [2019-11-16 00:42:38,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:38" (1/1) ... [2019-11-16 00:42:38,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-16 00:42:38,622 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-16 00:42:38,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-16 00:42:38,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-16 00:42:38,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/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 [2019-11-16 00:42:38,706 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-11-16 00:42:38,707 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-11-16 00:42:38,707 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-11-16 00:42:38,707 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-11-16 00:42:38,708 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-16 00:42:38,709 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-11-16 00:42:38,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-16 00:42:38,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-16 00:42:38,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-11-16 00:42:38,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-16 00:42:38,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-16 00:42:38,714 WARN L202 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-11-16 00:42:39,001 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-16 00:42:39,001 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-16 00:42:39,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:42:39 BoogieIcfgContainer [2019-11-16 00:42:39,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-16 00:42:39,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-16 00:42:39,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-16 00:42:39,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-16 00:42:39,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:42:37" (1/3) ... [2019-11-16 00:42:39,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fd4732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:42:39, skipping insertion in model container [2019-11-16 00:42:39,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:42:38" (2/3) ... [2019-11-16 00:42:39,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fd4732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:42:39, skipping insertion in model container [2019-11-16 00:42:39,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:42:39" (3/3) ... [2019-11-16 00:42:39,009 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2019-11-16 00:42:39,049 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,049 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,049 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,049 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,050 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,050 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,050 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,051 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,051 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,051 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,051 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,052 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,053 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,056 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,056 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,057 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,057 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,057 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,057 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,057 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,058 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,058 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,058 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,058 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,058 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,059 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,059 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,059 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-16 00:42:39,074 WARN L141 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-11-16 00:42:39,075 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-16 00:42:39,080 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-16 00:42:39,087 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-16 00:42:39,108 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-16 00:42:39,108 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-16 00:42:39,108 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-16 00:42:39,108 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-16 00:42:39,109 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-16 00:42:39,109 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-16 00:42:39,109 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-16 00:42:39,109 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-16 00:42:39,123 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 48 transitions [2019-11-16 00:42:39,193 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2019-11-16 00:42:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2019-11-16 00:42:39,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-16 00:42:39,209 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:39,210 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:42:39,212 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:39,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:39,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1918718107, now seen corresponding path program 1 times [2019-11-16 00:42:39,225 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:39,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838657674] [2019-11-16 00:42:39,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:39,227 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:39,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:39,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838657674] [2019-11-16 00:42:39,564 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:42:39,564 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:42:39,564 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230478799] [2019-11-16 00:42:39,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:42:39,568 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:39,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:42:39,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:42:39,584 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2019-11-16 00:42:39,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:39,768 INFO L93 Difference]: Finished difference Result 1777 states and 5125 transitions. [2019-11-16 00:42:39,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-16 00:42:39,770 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-11-16 00:42:39,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:39,789 INFO L225 Difference]: With dead ends: 1777 [2019-11-16 00:42:39,790 INFO L226 Difference]: Without dead ends: 499 [2019-11-16 00:42:39,791 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:42:39,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2019-11-16 00:42:39,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 387. [2019-11-16 00:42:39,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2019-11-16 00:42:39,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 992 transitions. [2019-11-16 00:42:39,870 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 992 transitions. Word has length 19 [2019-11-16 00:42:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:39,871 INFO L462 AbstractCegarLoop]: Abstraction has 387 states and 992 transitions. [2019-11-16 00:42:39,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:42:39,871 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 992 transitions. [2019-11-16 00:42:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-16 00:42:39,873 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:39,874 INFO L380 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] [2019-11-16 00:42:39,874 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:39,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:39,874 INFO L82 PathProgramCache]: Analyzing trace with hash 146645817, now seen corresponding path program 1 times [2019-11-16 00:42:39,875 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:39,875 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325706482] [2019-11-16 00:42:39,875 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:39,875 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:39,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:40,067 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325706482] [2019-11-16 00:42:40,067 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:42:40,068 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:42:40,068 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197779408] [2019-11-16 00:42:40,069 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:42:40,069 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:40,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:42:40,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:42:40,070 INFO L87 Difference]: Start difference. First operand 387 states and 992 transitions. Second operand 5 states. [2019-11-16 00:42:40,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:40,158 INFO L93 Difference]: Finished difference Result 464 states and 1146 transitions. [2019-11-16 00:42:40,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-16 00:42:40,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-16 00:42:40,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:40,163 INFO L225 Difference]: With dead ends: 464 [2019-11-16 00:42:40,163 INFO L226 Difference]: Without dead ends: 343 [2019-11-16 00:42:40,163 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-16 00:42:40,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-11-16 00:42:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 319. [2019-11-16 00:42:40,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-11-16 00:42:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 814 transitions. [2019-11-16 00:42:40,207 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 814 transitions. Word has length 22 [2019-11-16 00:42:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:40,208 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 814 transitions. [2019-11-16 00:42:40,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:42:40,209 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 814 transitions. [2019-11-16 00:42:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-16 00:42:40,211 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:40,211 INFO L380 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] [2019-11-16 00:42:40,212 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:40,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:40,212 INFO L82 PathProgramCache]: Analyzing trace with hash -509840719, now seen corresponding path program 1 times [2019-11-16 00:42:40,212 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:40,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580614968] [2019-11-16 00:42:40,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:40,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:40,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:40,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580614968] [2019-11-16 00:42:40,341 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:42:40,341 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-16 00:42:40,341 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498443938] [2019-11-16 00:42:40,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-16 00:42:40,342 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:40,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-16 00:42:40,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-16 00:42:40,342 INFO L87 Difference]: Start difference. First operand 319 states and 814 transitions. Second operand 5 states. [2019-11-16 00:42:40,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:40,385 INFO L93 Difference]: Finished difference Result 420 states and 1016 transitions. [2019-11-16 00:42:40,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-16 00:42:40,385 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-11-16 00:42:40,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:40,388 INFO L225 Difference]: With dead ends: 420 [2019-11-16 00:42:40,388 INFO L226 Difference]: Without dead ends: 290 [2019-11-16 00:42:40,388 INFO L600 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 [2019-11-16 00:42:40,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2019-11-16 00:42:40,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2019-11-16 00:42:40,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2019-11-16 00:42:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2019-11-16 00:42:40,419 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2019-11-16 00:42:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:40,420 INFO L462 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2019-11-16 00:42:40,420 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-16 00:42:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2019-11-16 00:42:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-16 00:42:40,426 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:40,426 INFO L380 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] [2019-11-16 00:42:40,426 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:40,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:40,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1422570323, now seen corresponding path program 1 times [2019-11-16 00:42:40,427 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:40,427 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027676690] [2019-11-16 00:42:40,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:40,428 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:40,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:40,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027676690] [2019-11-16 00:42:40,545 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:42:40,545 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-16 00:42:40,546 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093967325] [2019-11-16 00:42:40,546 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-16 00:42:40,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:40,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-16 00:42:40,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:42:40,547 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2019-11-16 00:42:40,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:40,654 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2019-11-16 00:42:40,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-16 00:42:40,655 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-16 00:42:40,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:40,658 INFO L225 Difference]: With dead ends: 437 [2019-11-16 00:42:40,658 INFO L226 Difference]: Without dead ends: 300 [2019-11-16 00:42:40,658 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-16 00:42:40,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-11-16 00:42:40,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 287. [2019-11-16 00:42:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2019-11-16 00:42:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 708 transitions. [2019-11-16 00:42:40,673 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 708 transitions. Word has length 25 [2019-11-16 00:42:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:40,673 INFO L462 AbstractCegarLoop]: Abstraction has 287 states and 708 transitions. [2019-11-16 00:42:40,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-16 00:42:40,674 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 708 transitions. [2019-11-16 00:42:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-16 00:42:40,675 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:40,675 INFO L380 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] [2019-11-16 00:42:40,676 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:40,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:40,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1011235803, now seen corresponding path program 2 times [2019-11-16 00:42:40,676 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:40,676 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030629182] [2019-11-16 00:42:40,677 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:40,677 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:40,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:40,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030629182] [2019-11-16 00:42:40,811 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-16 00:42:40,811 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-16 00:42:40,811 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435903561] [2019-11-16 00:42:40,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-16 00:42:40,812 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:40,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-16 00:42:40,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-16 00:42:40,812 INFO L87 Difference]: Start difference. First operand 287 states and 708 transitions. Second operand 6 states. [2019-11-16 00:42:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:40,944 INFO L93 Difference]: Finished difference Result 447 states and 1077 transitions. [2019-11-16 00:42:40,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-16 00:42:40,945 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-16 00:42:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:40,948 INFO L225 Difference]: With dead ends: 447 [2019-11-16 00:42:40,948 INFO L226 Difference]: Without dead ends: 319 [2019-11-16 00:42:40,948 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-16 00:42:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-11-16 00:42:40,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2019-11-16 00:42:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-11-16 00:42:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2019-11-16 00:42:40,961 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2019-11-16 00:42:40,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:40,961 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2019-11-16 00:42:40,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-16 00:42:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2019-11-16 00:42:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-16 00:42:40,962 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:40,964 INFO L380 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] [2019-11-16 00:42:40,966 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:40,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:40,967 INFO L82 PathProgramCache]: Analyzing trace with hash -871830122, now seen corresponding path program 1 times [2019-11-16 00:42:40,967 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:40,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422108323] [2019-11-16 00:42:40,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:40,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:40,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:41,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422108323] [2019-11-16 00:42:41,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068207256] [2019-11-16 00:42:41,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:41,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-16 00:42:41,192 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:41,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:41,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:41,241 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:41,249 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:41,249 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-16 00:42:41,250 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917049276] [2019-11-16 00:42:41,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-16 00:42:41,250 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:41,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-16 00:42:41,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:42:41,251 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2019-11-16 00:42:41,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:41,377 INFO L93 Difference]: Finished difference Result 564 states and 1360 transitions. [2019-11-16 00:42:41,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-16 00:42:41,377 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2019-11-16 00:42:41,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:41,380 INFO L225 Difference]: With dead ends: 564 [2019-11-16 00:42:41,380 INFO L226 Difference]: Without dead ends: 375 [2019-11-16 00:42:41,381 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-16 00:42:41,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2019-11-16 00:42:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 337. [2019-11-16 00:42:41,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2019-11-16 00:42:41,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 808 transitions. [2019-11-16 00:42:41,393 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 808 transitions. Word has length 29 [2019-11-16 00:42:41,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:41,393 INFO L462 AbstractCegarLoop]: Abstraction has 337 states and 808 transitions. [2019-11-16 00:42:41,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-16 00:42:41,393 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 808 transitions. [2019-11-16 00:42:41,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-16 00:42:41,394 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:41,394 INFO L380 BasicCegarLoop]: trace histogram [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, 1] [2019-11-16 00:42:41,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:41,598 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:41,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:41,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1030341071, now seen corresponding path program 1 times [2019-11-16 00:42:41,598 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:41,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837679322] [2019-11-16 00:42:41,598 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:41,598 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:41,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:41,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:42:41,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837679322] [2019-11-16 00:42:41,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766968352] [2019-11-16 00:42:41,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:41,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-16 00:42:41,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:41,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:41,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:42:41,809 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:41,810 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-16 00:42:41,810 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066314140] [2019-11-16 00:42:41,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-16 00:42:41,811 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:41,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-16 00:42:41,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-16 00:42:41,811 INFO L87 Difference]: Start difference. First operand 337 states and 808 transitions. Second operand 8 states. [2019-11-16 00:42:41,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:41,987 INFO L93 Difference]: Finished difference Result 660 states and 1552 transitions. [2019-11-16 00:42:41,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-16 00:42:41,988 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-11-16 00:42:41,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:41,992 INFO L225 Difference]: With dead ends: 660 [2019-11-16 00:42:41,992 INFO L226 Difference]: Without dead ends: 459 [2019-11-16 00:42:41,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-16 00:42:41,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2019-11-16 00:42:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 391. [2019-11-16 00:42:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2019-11-16 00:42:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 916 transitions. [2019-11-16 00:42:42,008 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 916 transitions. Word has length 33 [2019-11-16 00:42:42,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:42,009 INFO L462 AbstractCegarLoop]: Abstraction has 391 states and 916 transitions. [2019-11-16 00:42:42,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-16 00:42:42,009 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 916 transitions. [2019-11-16 00:42:42,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-16 00:42:42,011 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:42,011 INFO L380 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] [2019-11-16 00:42:42,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:42,215 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:42,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:42,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1904071158, now seen corresponding path program 1 times [2019-11-16 00:42:42,215 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:42,215 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479538370] [2019-11-16 00:42:42,215 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:42,216 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:42,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:42,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:42:42,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479538370] [2019-11-16 00:42:42,340 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608082211] [2019-11-16 00:42:42,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:42,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-16 00:42:42,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:42,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:42,441 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:42,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:42:42,444 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:42,444 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-16 00:42:42,445 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186773696] [2019-11-16 00:42:42,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-16 00:42:42,445 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:42,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-16 00:42:42,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-16 00:42:42,446 INFO L87 Difference]: Start difference. First operand 391 states and 916 transitions. Second operand 9 states. [2019-11-16 00:42:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:42,585 INFO L93 Difference]: Finished difference Result 676 states and 1584 transitions. [2019-11-16 00:42:42,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-16 00:42:42,585 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-11-16 00:42:42,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:42,589 INFO L225 Difference]: With dead ends: 676 [2019-11-16 00:42:42,589 INFO L226 Difference]: Without dead ends: 475 [2019-11-16 00:42:42,589 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-11-16 00:42:42,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2019-11-16 00:42:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 353. [2019-11-16 00:42:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2019-11-16 00:42:42,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 840 transitions. [2019-11-16 00:42:42,601 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 840 transitions. Word has length 37 [2019-11-16 00:42:42,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:42,602 INFO L462 AbstractCegarLoop]: Abstraction has 353 states and 840 transitions. [2019-11-16 00:42:42,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-16 00:42:42,602 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 840 transitions. [2019-11-16 00:42:42,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-16 00:42:42,603 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:42,603 INFO L380 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] [2019-11-16 00:42:42,806 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:42,807 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:42,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:42,807 INFO L82 PathProgramCache]: Analyzing trace with hash 762173390, now seen corresponding path program 2 times [2019-11-16 00:42:42,807 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:42,807 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883654498] [2019-11-16 00:42:42,807 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:42,807 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:42,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:42,929 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:42,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883654498] [2019-11-16 00:42:42,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573726783] [2019-11-16 00:42:42,930 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:43,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:42:43,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:43,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-16 00:42:43,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:43,037 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:43,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:43,041 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:43,041 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-16 00:42:43,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113194779] [2019-11-16 00:42:43,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-16 00:42:43,042 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:43,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-16 00:42:43,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-16 00:42:43,043 INFO L87 Difference]: Start difference. First operand 353 states and 840 transitions. Second operand 10 states. [2019-11-16 00:42:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:43,225 INFO L93 Difference]: Finished difference Result 692 states and 1616 transitions. [2019-11-16 00:42:43,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-16 00:42:43,226 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-11-16 00:42:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:43,228 INFO L225 Difference]: With dead ends: 692 [2019-11-16 00:42:43,228 INFO L226 Difference]: Without dead ends: 455 [2019-11-16 00:42:43,229 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2019-11-16 00:42:43,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2019-11-16 00:42:43,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 427. [2019-11-16 00:42:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-11-16 00:42:43,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 992 transitions. [2019-11-16 00:42:43,242 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 992 transitions. Word has length 37 [2019-11-16 00:42:43,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:43,243 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 992 transitions. [2019-11-16 00:42:43,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-16 00:42:43,243 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 992 transitions. [2019-11-16 00:42:43,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-16 00:42:43,244 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:43,244 INFO L380 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] [2019-11-16 00:42:43,456 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:43,456 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:43,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:43,457 INFO L82 PathProgramCache]: Analyzing trace with hash 858521875, now seen corresponding path program 3 times [2019-11-16 00:42:43,457 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:43,457 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293823772] [2019-11-16 00:42:43,457 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:43,457 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:43,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:43,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:43,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293823772] [2019-11-16 00:42:43,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142339332] [2019-11-16 00:42:43,612 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:43,674 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-16 00:42:43,674 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:43,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-16 00:42:43,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:43,717 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:43,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:43,721 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:43,721 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-16 00:42:43,722 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134881196] [2019-11-16 00:42:43,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-16 00:42:43,722 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:43,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-16 00:42:43,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-11-16 00:42:43,723 INFO L87 Difference]: Start difference. First operand 427 states and 992 transitions. Second operand 11 states. [2019-11-16 00:42:43,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:43,915 INFO L93 Difference]: Finished difference Result 684 states and 1600 transitions. [2019-11-16 00:42:43,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-16 00:42:43,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2019-11-16 00:42:43,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:43,919 INFO L225 Difference]: With dead ends: 684 [2019-11-16 00:42:43,919 INFO L226 Difference]: Without dead ends: 447 [2019-11-16 00:42:43,919 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2019-11-16 00:42:43,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-11-16 00:42:43,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 345. [2019-11-16 00:42:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2019-11-16 00:42:43,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 824 transitions. [2019-11-16 00:42:43,932 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 824 transitions. Word has length 41 [2019-11-16 00:42:43,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:43,933 INFO L462 AbstractCegarLoop]: Abstraction has 345 states and 824 transitions. [2019-11-16 00:42:43,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-16 00:42:43,934 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 824 transitions. [2019-11-16 00:42:43,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-16 00:42:43,934 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:43,935 INFO L380 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] [2019-11-16 00:42:44,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:44,138 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:44,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1656791919, now seen corresponding path program 4 times [2019-11-16 00:42:44,138 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:44,138 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16746913] [2019-11-16 00:42:44,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:44,138 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:44,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:44,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16746913] [2019-11-16 00:42:44,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590745437] [2019-11-16 00:42:44,287 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:44,351 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:42:44,351 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:44,352 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-16 00:42:44,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:44,379 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:44,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:44,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:44,384 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:44,384 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-16 00:42:44,385 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354322521] [2019-11-16 00:42:44,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-16 00:42:44,385 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:44,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-16 00:42:44,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-16 00:42:44,386 INFO L87 Difference]: Start difference. First operand 345 states and 824 transitions. Second operand 11 states. [2019-11-16 00:42:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:44,595 INFO L93 Difference]: Finished difference Result 692 states and 1616 transitions. [2019-11-16 00:42:44,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-16 00:42:44,595 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2019-11-16 00:42:44,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:44,599 INFO L225 Difference]: With dead ends: 692 [2019-11-16 00:42:44,599 INFO L226 Difference]: Without dead ends: 503 [2019-11-16 00:42:44,600 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-11-16 00:42:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2019-11-16 00:42:44,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 475. [2019-11-16 00:42:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2019-11-16 00:42:44,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1088 transitions. [2019-11-16 00:42:44,614 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1088 transitions. Word has length 41 [2019-11-16 00:42:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:44,615 INFO L462 AbstractCegarLoop]: Abstraction has 475 states and 1088 transitions. [2019-11-16 00:42:44,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-16 00:42:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1088 transitions. [2019-11-16 00:42:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-16 00:42:44,616 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:44,616 INFO L380 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] [2019-11-16 00:42:44,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:44,820 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:44,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:44,820 INFO L82 PathProgramCache]: Analyzing trace with hash -645047466, now seen corresponding path program 5 times [2019-11-16 00:42:44,820 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:44,821 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268412762] [2019-11-16 00:42:44,821 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:44,821 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:44,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:44,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268412762] [2019-11-16 00:42:44,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096454867] [2019-11-16 00:42:44,975 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:45,054 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-16 00:42:45,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:45,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-16 00:42:45,067 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:45,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:45,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:45,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:45,136 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:45,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-16 00:42:45,137 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015751370] [2019-11-16 00:42:45,137 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-16 00:42:45,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:45,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-16 00:42:45,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-16 00:42:45,138 INFO L87 Difference]: Start difference. First operand 475 states and 1088 transitions. Second operand 12 states. [2019-11-16 00:42:45,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:45,403 INFO L93 Difference]: Finished difference Result 732 states and 1696 transitions. [2019-11-16 00:42:45,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-16 00:42:45,403 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-11-16 00:42:45,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:45,407 INFO L225 Difference]: With dead ends: 732 [2019-11-16 00:42:45,407 INFO L226 Difference]: Without dead ends: 495 [2019-11-16 00:42:45,407 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-11-16 00:42:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2019-11-16 00:42:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 377. [2019-11-16 00:42:45,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2019-11-16 00:42:45,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 888 transitions. [2019-11-16 00:42:45,418 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 888 transitions. Word has length 45 [2019-11-16 00:42:45,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:45,418 INFO L462 AbstractCegarLoop]: Abstraction has 377 states and 888 transitions. [2019-11-16 00:42:45,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-16 00:42:45,419 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 888 transitions. [2019-11-16 00:42:45,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-16 00:42:45,419 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:45,420 INFO L380 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] [2019-11-16 00:42:45,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:45,636 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:45,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:45,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1356781681, now seen corresponding path program 6 times [2019-11-16 00:42:45,637 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:45,637 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457406002] [2019-11-16 00:42:45,637 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:45,637 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:45,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:45,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457406002] [2019-11-16 00:42:45,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028220901] [2019-11-16 00:42:45,782 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:45,847 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-16 00:42:45,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:45,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-16 00:42:45,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:45,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:45,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:45,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:45,878 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:45,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-16 00:42:45,878 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612985054] [2019-11-16 00:42:45,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-16 00:42:45,879 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:45,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-16 00:42:45,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-16 00:42:45,879 INFO L87 Difference]: Start difference. First operand 377 states and 888 transitions. Second operand 13 states. [2019-11-16 00:42:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:46,143 INFO L93 Difference]: Finished difference Result 740 states and 1712 transitions. [2019-11-16 00:42:46,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-16 00:42:46,144 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2019-11-16 00:42:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:46,147 INFO L225 Difference]: With dead ends: 740 [2019-11-16 00:42:46,147 INFO L226 Difference]: Without dead ends: 527 [2019-11-16 00:42:46,148 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2019-11-16 00:42:46,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2019-11-16 00:42:46,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2019-11-16 00:42:46,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2019-11-16 00:42:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2019-11-16 00:42:46,160 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 49 [2019-11-16 00:42:46,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:46,160 INFO L462 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2019-11-16 00:42:46,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-16 00:42:46,160 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2019-11-16 00:42:46,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-16 00:42:46,161 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:46,161 INFO L380 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] [2019-11-16 00:42:46,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:46,372 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:46,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:46,372 INFO L82 PathProgramCache]: Analyzing trace with hash -285720010, now seen corresponding path program 7 times [2019-11-16 00:42:46,373 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:46,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539721283] [2019-11-16 00:42:46,373 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:46,373 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:46,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:46,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539721283] [2019-11-16 00:42:46,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158855629] [2019-11-16 00:42:46,513 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:46,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:46,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-16 00:42:46,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:46,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:46,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:46,630 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:46,634 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:46,635 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:46,635 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-16 00:42:46,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955628100] [2019-11-16 00:42:46,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-16 00:42:46,635 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:46,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-16 00:42:46,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-16 00:42:46,638 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2019-11-16 00:42:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:46,911 INFO L93 Difference]: Finished difference Result 800 states and 1832 transitions. [2019-11-16 00:42:46,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-16 00:42:46,912 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2019-11-16 00:42:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:46,916 INFO L225 Difference]: With dead ends: 800 [2019-11-16 00:42:46,916 INFO L226 Difference]: Without dead ends: 611 [2019-11-16 00:42:46,917 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2019-11-16 00:42:46,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2019-11-16 00:42:46,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 571. [2019-11-16 00:42:46,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2019-11-16 00:42:46,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1280 transitions. [2019-11-16 00:42:46,932 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1280 transitions. Word has length 53 [2019-11-16 00:42:46,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:46,932 INFO L462 AbstractCegarLoop]: Abstraction has 571 states and 1280 transitions. [2019-11-16 00:42:46,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-16 00:42:46,932 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1280 transitions. [2019-11-16 00:42:46,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-16 00:42:46,933 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:46,933 INFO L380 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] [2019-11-16 00:42:47,137 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:47,145 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:47,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1833667503, now seen corresponding path program 8 times [2019-11-16 00:42:47,145 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:47,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901483948] [2019-11-16 00:42:47,146 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:47,146 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:47,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:47,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:47,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901483948] [2019-11-16 00:42:47,304 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939790437] [2019-11-16 00:42:47,304 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:47,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:42:47,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:47,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-16 00:42:47,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:47,410 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:47,411 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:47,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:47,418 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:47,418 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-16 00:42:47,418 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815410362] [2019-11-16 00:42:47,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-16 00:42:47,421 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:47,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-16 00:42:47,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-16 00:42:47,422 INFO L87 Difference]: Start difference. First operand 571 states and 1280 transitions. Second operand 15 states. [2019-11-16 00:42:47,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:47,734 INFO L93 Difference]: Finished difference Result 828 states and 1888 transitions. [2019-11-16 00:42:47,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-16 00:42:47,734 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2019-11-16 00:42:47,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:47,738 INFO L225 Difference]: With dead ends: 828 [2019-11-16 00:42:47,738 INFO L226 Difference]: Without dead ends: 615 [2019-11-16 00:42:47,740 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2019-11-16 00:42:47,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2019-11-16 00:42:47,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 603. [2019-11-16 00:42:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-11-16 00:42:47,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1344 transitions. [2019-11-16 00:42:47,756 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1344 transitions. Word has length 57 [2019-11-16 00:42:47,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:47,757 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1344 transitions. [2019-11-16 00:42:47,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-16 00:42:47,757 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1344 transitions. [2019-11-16 00:42:47,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-16 00:42:47,758 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:47,758 INFO L380 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] [2019-11-16 00:42:47,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:47,970 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:47,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:47,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1419675286, now seen corresponding path program 9 times [2019-11-16 00:42:47,970 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:47,971 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772745944] [2019-11-16 00:42:47,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:47,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:47,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:47,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:42:48,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772745944] [2019-11-16 00:42:48,146 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470028888] [2019-11-16 00:42:48,146 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:48,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-16 00:42:48,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:48,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-16 00:42:48,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:48,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:48,249 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:48,254 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:42:48,255 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:48,255 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-16 00:42:48,255 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698441249] [2019-11-16 00:42:48,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-16 00:42:48,255 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:48,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-16 00:42:48,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-16 00:42:48,258 INFO L87 Difference]: Start difference. First operand 603 states and 1344 transitions. Second operand 15 states. [2019-11-16 00:42:48,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:48,584 INFO L93 Difference]: Finished difference Result 876 states and 1984 transitions. [2019-11-16 00:42:48,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-16 00:42:48,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2019-11-16 00:42:48,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:48,589 INFO L225 Difference]: With dead ends: 876 [2019-11-16 00:42:48,589 INFO L226 Difference]: Without dead ends: 675 [2019-11-16 00:42:48,590 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2019-11-16 00:42:48,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2019-11-16 00:42:48,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 619. [2019-11-16 00:42:48,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-11-16 00:42:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1376 transitions. [2019-11-16 00:42:48,607 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1376 transitions. Word has length 61 [2019-11-16 00:42:48,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:48,607 INFO L462 AbstractCegarLoop]: Abstraction has 619 states and 1376 transitions. [2019-11-16 00:42:48,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-16 00:42:48,608 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1376 transitions. [2019-11-16 00:42:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-16 00:42:48,609 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:48,609 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:42:48,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:48,816 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:48,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:48,816 INFO L82 PathProgramCache]: Analyzing trace with hash 2007066035, now seen corresponding path program 10 times [2019-11-16 00:42:48,817 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:48,817 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512652406] [2019-11-16 00:42:48,817 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:48,817 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:48,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:48,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:49,054 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:49,055 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512652406] [2019-11-16 00:42:49,055 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422163514] [2019-11-16 00:42:49,055 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:49,147 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:42:49,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:49,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-16 00:42:49,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:49,217 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:49,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:49,224 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:49,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-16 00:42:49,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566770893] [2019-11-16 00:42:49,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-16 00:42:49,225 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:49,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-16 00:42:49,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-16 00:42:49,225 INFO L87 Difference]: Start difference. First operand 619 states and 1376 transitions. Second operand 17 states. [2019-11-16 00:42:49,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:49,639 INFO L93 Difference]: Finished difference Result 974 states and 2229 transitions. [2019-11-16 00:42:49,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-16 00:42:49,639 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2019-11-16 00:42:49,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:49,644 INFO L225 Difference]: With dead ends: 974 [2019-11-16 00:42:49,644 INFO L226 Difference]: Without dead ends: 679 [2019-11-16 00:42:49,644 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2019-11-16 00:42:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-11-16 00:42:49,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 481. [2019-11-16 00:42:49,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2019-11-16 00:42:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1096 transitions. [2019-11-16 00:42:49,657 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1096 transitions. Word has length 65 [2019-11-16 00:42:49,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:49,658 INFO L462 AbstractCegarLoop]: Abstraction has 481 states and 1096 transitions. [2019-11-16 00:42:49,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-16 00:42:49,658 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1096 transitions. [2019-11-16 00:42:49,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-16 00:42:49,659 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:49,659 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:42:49,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:49,863 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:49,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:49,863 INFO L82 PathProgramCache]: Analyzing trace with hash 544491342, now seen corresponding path program 11 times [2019-11-16 00:42:49,863 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:49,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833416236] [2019-11-16 00:42:49,863 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:49,863 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:49,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:50,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833416236] [2019-11-16 00:42:50,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941873098] [2019-11-16 00:42:50,082 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:50,159 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-16 00:42:50,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:50,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-16 00:42:50,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:50,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:50,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:50,203 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:50,203 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:50,203 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-16 00:42:50,203 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661053430] [2019-11-16 00:42:50,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-16 00:42:50,209 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:50,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-16 00:42:50,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-11-16 00:42:50,210 INFO L87 Difference]: Start difference. First operand 481 states and 1096 transitions. Second operand 18 states. [2019-11-16 00:42:50,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:50,561 INFO L93 Difference]: Finished difference Result 1062 states and 2405 transitions. [2019-11-16 00:42:50,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-16 00:42:50,561 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2019-11-16 00:42:50,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:50,565 INFO L225 Difference]: With dead ends: 1062 [2019-11-16 00:42:50,566 INFO L226 Difference]: Without dead ends: 767 [2019-11-16 00:42:50,566 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=312, Invalid=810, Unknown=0, NotChecked=0, Total=1122 [2019-11-16 00:42:50,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2019-11-16 00:42:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 500. [2019-11-16 00:42:50,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2019-11-16 00:42:50,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1134 transitions. [2019-11-16 00:42:50,580 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1134 transitions. Word has length 69 [2019-11-16 00:42:50,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:50,580 INFO L462 AbstractCegarLoop]: Abstraction has 500 states and 1134 transitions. [2019-11-16 00:42:50,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-16 00:42:50,581 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1134 transitions. [2019-11-16 00:42:50,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-16 00:42:50,582 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:50,582 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:42:50,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:50,785 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:50,785 INFO L82 PathProgramCache]: Analyzing trace with hash 645143699, now seen corresponding path program 12 times [2019-11-16 00:42:50,785 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:50,786 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520607644] [2019-11-16 00:42:50,786 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:50,786 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:50,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:50,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:50,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520607644] [2019-11-16 00:42:50,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788010547] [2019-11-16 00:42:50,975 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:51,051 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-16 00:42:51,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:51,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-16 00:42:51,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:51,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:51,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:51,115 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:51,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-16 00:42:51,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557086501] [2019-11-16 00:42:51,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-16 00:42:51,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:51,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-16 00:42:51,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-11-16 00:42:51,119 INFO L87 Difference]: Start difference. First operand 500 states and 1134 transitions. Second operand 19 states. [2019-11-16 00:42:51,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:51,529 INFO L93 Difference]: Finished difference Result 1078 states and 2437 transitions. [2019-11-16 00:42:51,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-16 00:42:51,530 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2019-11-16 00:42:51,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:51,533 INFO L225 Difference]: With dead ends: 1078 [2019-11-16 00:42:51,533 INFO L226 Difference]: Without dead ends: 783 [2019-11-16 00:42:51,534 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=908, Unknown=0, NotChecked=0, Total=1260 [2019-11-16 00:42:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2019-11-16 00:42:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 513. [2019-11-16 00:42:51,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2019-11-16 00:42:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1160 transitions. [2019-11-16 00:42:51,547 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1160 transitions. Word has length 73 [2019-11-16 00:42:51,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:51,547 INFO L462 AbstractCegarLoop]: Abstraction has 513 states and 1160 transitions. [2019-11-16 00:42:51,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-16 00:42:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1160 transitions. [2019-11-16 00:42:51,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-16 00:42:51,548 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:51,548 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:42:51,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:51,752 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:51,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:51,752 INFO L82 PathProgramCache]: Analyzing trace with hash -934989010, now seen corresponding path program 13 times [2019-11-16 00:42:51,752 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:51,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978287052] [2019-11-16 00:42:51,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:51,752 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:51,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:51,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:52,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978287052] [2019-11-16 00:42:52,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877064457] [2019-11-16 00:42:52,038 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:52,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-16 00:42:52,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:52,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:52,146 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:52,153 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:52,154 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-16 00:42:52,154 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020509202] [2019-11-16 00:42:52,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-16 00:42:52,154 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:52,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-16 00:42:52,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-11-16 00:42:52,155 INFO L87 Difference]: Start difference. First operand 513 states and 1160 transitions. Second operand 20 states. [2019-11-16 00:42:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:52,551 INFO L93 Difference]: Finished difference Result 1012 states and 2256 transitions. [2019-11-16 00:42:52,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-16 00:42:52,551 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2019-11-16 00:42:52,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:52,554 INFO L225 Difference]: With dead ends: 1012 [2019-11-16 00:42:52,554 INFO L226 Difference]: Without dead ends: 775 [2019-11-16 00:42:52,555 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=388, Invalid=944, Unknown=0, NotChecked=0, Total=1332 [2019-11-16 00:42:52,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2019-11-16 00:42:52,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 747. [2019-11-16 00:42:52,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 747 states. [2019-11-16 00:42:52,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1632 transitions. [2019-11-16 00:42:52,569 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1632 transitions. Word has length 77 [2019-11-16 00:42:52,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:52,570 INFO L462 AbstractCegarLoop]: Abstraction has 747 states and 1632 transitions. [2019-11-16 00:42:52,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-16 00:42:52,570 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1632 transitions. [2019-11-16 00:42:52,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-16 00:42:52,571 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:52,571 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:42:52,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:52,774 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:52,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:52,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1175581555, now seen corresponding path program 14 times [2019-11-16 00:42:52,775 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:52,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941692435] [2019-11-16 00:42:52,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:52,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:52,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:52,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941692435] [2019-11-16 00:42:52,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507772761] [2019-11-16 00:42:52,992 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:53,062 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-16 00:42:53,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:53,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-16 00:42:53,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:53,099 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:53,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:53,108 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:53,108 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-16 00:42:53,108 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956114814] [2019-11-16 00:42:53,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-16 00:42:53,109 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:53,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-16 00:42:53,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2019-11-16 00:42:53,110 INFO L87 Difference]: Start difference. First operand 747 states and 1632 transitions. Second operand 21 states. [2019-11-16 00:42:53,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:53,499 INFO L93 Difference]: Finished difference Result 1004 states and 2240 transitions. [2019-11-16 00:42:53,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-16 00:42:53,499 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2019-11-16 00:42:53,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:53,503 INFO L225 Difference]: With dead ends: 1004 [2019-11-16 00:42:53,503 INFO L226 Difference]: Without dead ends: 767 [2019-11-16 00:42:53,504 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=433, Invalid=1049, Unknown=0, NotChecked=0, Total=1482 [2019-11-16 00:42:53,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2019-11-16 00:42:53,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 505. [2019-11-16 00:42:53,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2019-11-16 00:42:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1144 transitions. [2019-11-16 00:42:53,516 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1144 transitions. Word has length 81 [2019-11-16 00:42:53,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:53,516 INFO L462 AbstractCegarLoop]: Abstraction has 505 states and 1144 transitions. [2019-11-16 00:42:53,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-16 00:42:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1144 transitions. [2019-11-16 00:42:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-16 00:42:53,518 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:53,518 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:42:53,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:53,721 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:53,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:53,721 INFO L82 PathProgramCache]: Analyzing trace with hash -63305743, now seen corresponding path program 15 times [2019-11-16 00:42:53,721 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:53,721 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586982634] [2019-11-16 00:42:53,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:53,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:53,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:53,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586982634] [2019-11-16 00:42:53,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291520026] [2019-11-16 00:42:53,938 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:54,016 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-16 00:42:54,016 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:54,017 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-16 00:42:54,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:54,045 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:54,046 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:54,046 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:54,054 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:54,054 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-16 00:42:54,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516790492] [2019-11-16 00:42:54,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-16 00:42:54,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:54,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-16 00:42:54,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2019-11-16 00:42:54,055 INFO L87 Difference]: Start difference. First operand 505 states and 1144 transitions. Second operand 21 states. [2019-11-16 00:42:54,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:54,433 INFO L93 Difference]: Finished difference Result 1012 states and 2256 transitions. [2019-11-16 00:42:54,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-16 00:42:54,434 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2019-11-16 00:42:54,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:54,439 INFO L225 Difference]: With dead ends: 1012 [2019-11-16 00:42:54,439 INFO L226 Difference]: Without dead ends: 823 [2019-11-16 00:42:54,440 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2019-11-16 00:42:54,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2019-11-16 00:42:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 795. [2019-11-16 00:42:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2019-11-16 00:42:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1728 transitions. [2019-11-16 00:42:54,458 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1728 transitions. Word has length 81 [2019-11-16 00:42:54,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:54,459 INFO L462 AbstractCegarLoop]: Abstraction has 795 states and 1728 transitions. [2019-11-16 00:42:54,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-16 00:42:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1728 transitions. [2019-11-16 00:42:54,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-16 00:42:54,461 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:54,461 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:42:54,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:54,665 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:54,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:54,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1232281014, now seen corresponding path program 16 times [2019-11-16 00:42:54,665 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:54,665 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644248400] [2019-11-16 00:42:54,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:54,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:54,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:54,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:54,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644248400] [2019-11-16 00:42:54,976 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410379445] [2019-11-16 00:42:54,976 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:55,063 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-16 00:42:55,063 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:55,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-16 00:42:55,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:55,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:55,094 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:55,095 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:55,101 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:55,101 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-16 00:42:55,102 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858089042] [2019-11-16 00:42:55,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-16 00:42:55,102 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:55,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-16 00:42:55,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-11-16 00:42:55,103 INFO L87 Difference]: Start difference. First operand 795 states and 1728 transitions. Second operand 22 states. [2019-11-16 00:42:55,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:55,473 INFO L93 Difference]: Finished difference Result 1052 states and 2336 transitions. [2019-11-16 00:42:55,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-16 00:42:55,473 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2019-11-16 00:42:55,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:55,477 INFO L225 Difference]: With dead ends: 1052 [2019-11-16 00:42:55,477 INFO L226 Difference]: Without dead ends: 863 [2019-11-16 00:42:55,478 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=454, Invalid=1106, Unknown=0, NotChecked=0, Total=1560 [2019-11-16 00:42:55,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2019-11-16 00:42:55,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 561. [2019-11-16 00:42:55,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 561 states. [2019-11-16 00:42:55,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1256 transitions. [2019-11-16 00:42:55,490 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1256 transitions. Word has length 85 [2019-11-16 00:42:55,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:55,491 INFO L462 AbstractCegarLoop]: Abstraction has 561 states and 1256 transitions. [2019-11-16 00:42:55,491 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-16 00:42:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1256 transitions. [2019-11-16 00:42:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-16 00:42:55,492 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:55,493 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:42:55,696 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:55,696 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:55,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:55,696 INFO L82 PathProgramCache]: Analyzing trace with hash -2008522415, now seen corresponding path program 17 times [2019-11-16 00:42:55,697 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:55,697 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339348426] [2019-11-16 00:42:55,697 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:55,697 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:55,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:42:55,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339348426] [2019-11-16 00:42:55,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025646530] [2019-11-16 00:42:55,952 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:56,050 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-16 00:42:56,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:56,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-16 00:42:56,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:56,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:56,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:42:56,083 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:56,083 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-16 00:42:56,084 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050980029] [2019-11-16 00:42:56,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-16 00:42:56,085 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:56,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-16 00:42:56,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2019-11-16 00:42:56,086 INFO L87 Difference]: Start difference. First operand 561 states and 1256 transitions. Second operand 22 states. [2019-11-16 00:42:56,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:56,487 INFO L93 Difference]: Finished difference Result 1010 states and 2203 transitions. [2019-11-16 00:42:56,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-16 00:42:56,487 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 89 [2019-11-16 00:42:56,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:56,491 INFO L225 Difference]: With dead ends: 1010 [2019-11-16 00:42:56,491 INFO L226 Difference]: Without dead ends: 867 [2019-11-16 00:42:56,492 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=470, Invalid=1090, Unknown=0, NotChecked=0, Total=1560 [2019-11-16 00:42:56,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2019-11-16 00:42:56,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 827. [2019-11-16 00:42:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2019-11-16 00:42:56,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1792 transitions. [2019-11-16 00:42:56,505 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1792 transitions. Word has length 89 [2019-11-16 00:42:56,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:56,506 INFO L462 AbstractCegarLoop]: Abstraction has 827 states and 1792 transitions. [2019-11-16 00:42:56,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-16 00:42:56,506 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1792 transitions. [2019-11-16 00:42:56,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-16 00:42:56,508 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:56,508 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:42:56,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:56,719 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:56,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1705518033, now seen corresponding path program 18 times [2019-11-16 00:42:56,720 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:56,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047192831] [2019-11-16 00:42:56,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:56,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:56,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:56,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047192831] [2019-11-16 00:42:56,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450845480] [2019-11-16 00:42:56,994 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:57,079 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-16 00:42:57,079 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-16 00:42:57,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-16 00:42:57,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:57,113 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:57,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:57,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-16 00:42:57,121 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:57,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-16 00:42:57,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455322523] [2019-11-16 00:42:57,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-16 00:42:57,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:57,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-16 00:42:57,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2019-11-16 00:42:57,122 INFO L87 Difference]: Start difference. First operand 827 states and 1792 transitions. Second operand 23 states. [2019-11-16 00:42:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:57,672 INFO L93 Difference]: Finished difference Result 1084 states and 2400 transitions. [2019-11-16 00:42:57,673 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-16 00:42:57,673 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2019-11-16 00:42:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:57,678 INFO L225 Difference]: With dead ends: 1084 [2019-11-16 00:42:57,678 INFO L226 Difference]: Without dead ends: 871 [2019-11-16 00:42:57,679 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2019-11-16 00:42:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2019-11-16 00:42:57,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 859. [2019-11-16 00:42:57,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 859 states. [2019-11-16 00:42:57,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1856 transitions. [2019-11-16 00:42:57,694 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1856 transitions. Word has length 89 [2019-11-16 00:42:57,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:57,694 INFO L462 AbstractCegarLoop]: Abstraction has 859 states and 1856 transitions. [2019-11-16 00:42:57,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-16 00:42:57,695 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1856 transitions. [2019-11-16 00:42:57,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-16 00:42:57,696 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:57,697 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:42:57,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:57,901 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:57,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:57,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1111876118, now seen corresponding path program 19 times [2019-11-16 00:42:57,901 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:57,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814326782] [2019-11-16 00:42:57,901 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:57,901 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:57,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:42:58,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814326782] [2019-11-16 00:42:58,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188613443] [2019-11-16 00:42:58,151 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-16 00:42:58,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-16 00:42:58,232 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-16 00:42:58,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:58,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-16 00:42:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-16 00:42:58,267 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-16 00:42:58,267 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-16 00:42:58,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701010658] [2019-11-16 00:42:58,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-16 00:42:58,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-16 00:42:58,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-16 00:42:58,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2019-11-16 00:42:58,268 INFO L87 Difference]: Start difference. First operand 859 states and 1856 transitions. Second operand 23 states. [2019-11-16 00:42:58,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-16 00:42:58,773 INFO L93 Difference]: Finished difference Result 1132 states and 2496 transitions. [2019-11-16 00:42:58,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-16 00:42:58,774 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 93 [2019-11-16 00:42:58,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-16 00:42:58,779 INFO L225 Difference]: With dead ends: 1132 [2019-11-16 00:42:58,779 INFO L226 Difference]: Without dead ends: 931 [2019-11-16 00:42:58,780 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=1282, Unknown=0, NotChecked=0, Total=1806 [2019-11-16 00:42:58,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2019-11-16 00:42:58,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 875. [2019-11-16 00:42:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 875 states. [2019-11-16 00:42:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1888 transitions. [2019-11-16 00:42:58,800 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1888 transitions. Word has length 93 [2019-11-16 00:42:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-16 00:42:58,801 INFO L462 AbstractCegarLoop]: Abstraction has 875 states and 1888 transitions. [2019-11-16 00:42:58,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-16 00:42:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1888 transitions. [2019-11-16 00:42:58,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-16 00:42:58,805 INFO L372 BasicCegarLoop]: Found error trace [2019-11-16 00:42:58,805 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-16 00:42:59,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-16 00:42:59,009 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-16 00:42:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-16 00:42:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1127153971, now seen corresponding path program 20 times [2019-11-16 00:42:59,009 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-16 00:42:59,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876399662] [2019-11-16 00:42:59,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:59,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-16 00:42:59,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-16 00:42:59,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-16 00:42:59,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-16 00:42:59,110 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-16 00:42:59,110 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-11-16 00:42:59,208 INFO L303 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2019-11-16 00:42:59,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 12:42:59 BasicIcfg [2019-11-16 00:42:59,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-16 00:42:59,217 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-16 00:42:59,218 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-16 00:42:59,218 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-16 00:42:59,218 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:42:39" (3/4) ... [2019-11-16 00:42:59,220 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-16 00:42:59,341 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9c1fcc4b-331d-486f-b2fc-d120f156c696/bin/uautomizer/witness.graphml [2019-11-16 00:42:59,341 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-16 00:42:59,343 INFO L168 Benchmark]: Toolchain (without parser) took 21502.23 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 440.4 MB). Free memory was 940.8 MB in the beginning and 1.1 GB in the end (delta: -156.2 MB). Peak memory consumption was 284.2 MB. Max. memory is 11.5 GB. [2019-11-16 00:42:59,343 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:42:59,344 INFO L168 Benchmark]: CACSL2BoogieTranslator took 720.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.0 MB). Free memory was 940.8 MB in the beginning and 1.2 GB in the end (delta: -213.4 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-16 00:42:59,344 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.74 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:42:59,344 INFO L168 Benchmark]: Boogie Preprocessor took 23.21 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-16 00:42:59,345 INFO L168 Benchmark]: RCFGBuilder took 380.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 26.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 11.5 GB. [2019-11-16 00:42:59,345 INFO L168 Benchmark]: TraceAbstraction took 20213.71 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 257.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.1 MB). Peak memory consumption was 262.5 MB. Max. memory is 11.5 GB. [2019-11-16 00:42:59,345 INFO L168 Benchmark]: Witness Printer took 124.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. [2019-11-16 00:42:59,347 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 720.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 183.0 MB). Free memory was 940.8 MB in the beginning and 1.2 GB in the end (delta: -213.4 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.74 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.21 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 380.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 26.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 20213.71 ms. Allocated memory was 1.2 GB in the beginning and 1.5 GB in the end (delta: 257.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.1 MB). Peak memory consumption was 262.5 MB. Max. memory is 11.5 GB. * Witness Printer took 124.11 ms. Allocated memory is still 1.5 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; VAL [i=3, j=6] [L693] 0 pthread_t id1, id2; VAL [i=3, j=6] [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=5] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=6] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=7] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=8] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L697] 0 int condI = i >= (2*10 +6); [L700] 0 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L702] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. Result: UNSAFE, OverallTime: 20.1s, OverallIterations: 27, TraceHistogramMax: 10, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1477 SDtfs, 7185 SDslu, 9329 SDs, 0 SdLazy, 1938 SolverSat, 997 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1881 GetRequests, 1295 SyntacticMatches, 0 SemanticMatches, 586 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3070 ImplicationChecksByTransitivity, 8.3s 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 DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 26 MinimizatonAttempts, 2355 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 2780 NumberOfCodeBlocks, 2780 NumberOfCodeBlocksAsserted, 102 NumberOfCheckSat, 2636 ConstructedInterpolants, 0 QuantifiedInterpolants, 521732 SizeOfPredicates, 290 NumberOfNonLiveVariables, 3200 ConjunctsInSsa, 357 ConjunctsInUnsatCore, 47 InterpolantComputations, 5 PerfectInterpolantSequences, 10/4180 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...