./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 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 0.1.24-678e011 [2019-11-20 04:49:52,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 04:49:52,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 04:49:52,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 04:49:52,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 04:49:52,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 04:49:52,433 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 04:49:52,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 04:49:52,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 04:49:52,438 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 04:49:52,439 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 04:49:52,440 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 04:49:52,440 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 04:49:52,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 04:49:52,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 04:49:52,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 04:49:52,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 04:49:52,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 04:49:52,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 04:49:52,449 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 04:49:52,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 04:49:52,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 04:49:52,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 04:49:52,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 04:49:52,455 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 04:49:52,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 04:49:52,456 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 04:49:52,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 04:49:52,458 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 04:49:52,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 04:49:52,459 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 04:49:52,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 04:49:52,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 04:49:52,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 04:49:52,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 04:49:52,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 04:49:52,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 04:49:52,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 04:49:52,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 04:49:52,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 04:49:52,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 04:49:52,465 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 04:49:52,477 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 04:49:52,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 04:49:52,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 04:49:52,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 04:49:52,478 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 04:49:52,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 04:49:52,479 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 04:49:52,479 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 04:49:52,479 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 04:49:52,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 04:49:52,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 04:49:52,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 04:49:52,480 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 04:49:52,480 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 04:49:52,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 04:49:52,481 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 04:49:52,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 04:49:52,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 04:49:52,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 04:49:52,482 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 04:49:52,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 04:49:52,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:49:52,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 04:49:52,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 04:49:52,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 04:49:52,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 04:49:52,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 04:49:52,483 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 04:49:52,484 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_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:49:52,617 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 04:49:52,627 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 04:49:52,630 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 04:49:52,631 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 04:49:52,632 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 04:49:52,632 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longer-2.i [2019-11-20 04:49:52,681 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/bin/uautomizer/data/84faf3847/07ce92b7684e44af88ff186ff742f391/FLAGfa1f2af96 [2019-11-20 04:49:53,195 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 04:49:53,196 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/sv-benchmarks/c/pthread/triangular-longer-2.i [2019-11-20 04:49:53,214 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/bin/uautomizer/data/84faf3847/07ce92b7684e44af88ff186ff742f391/FLAGfa1f2af96 [2019-11-20 04:49:53,704 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/bin/uautomizer/data/84faf3847/07ce92b7684e44af88ff186ff742f391 [2019-11-20 04:49:53,706 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 04:49:53,707 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 04:49:53,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 04:49:53,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 04:49:53,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 04:49:53,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:49:53" (1/1) ... [2019-11-20 04:49:53,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72edda5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:49:53, skipping insertion in model container [2019-11-20 04:49:53,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:49:53" (1/1) ... [2019-11-20 04:49:53,728 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 04:49:53,760 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 04:49:54,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:49:54,181 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 04:49:54,249 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:49:54,321 INFO L192 MainTranslator]: Completed translation [2019-11-20 04:49:54,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:49:54 WrapperNode [2019-11-20 04:49:54,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 04:49:54,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 04:49:54,322 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 04:49:54,322 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 04:49:54,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:49:54" (1/1) ... [2019-11-20 04:49:54,343 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:49:54" (1/1) ... [2019-11-20 04:49:54,360 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 04:49:54,361 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 04:49:54,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 04:49:54,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 04:49:54,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:49:54" (1/1) ... [2019-11-20 04:49:54,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:49:54" (1/1) ... [2019-11-20 04:49:54,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:49:54" (1/1) ... [2019-11-20 04:49:54,372 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:49:54" (1/1) ... [2019-11-20 04:49:54,377 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:49:54" (1/1) ... [2019-11-20 04:49:54,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:49:54" (1/1) ... [2019-11-20 04:49:54,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:49:54" (1/1) ... [2019-11-20 04:49:54,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 04:49:54,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 04:49:54,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 04:49:54,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 04:49:54,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:49:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:49:54,447 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-11-20 04:49:54,448 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-11-20 04:49:54,448 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-11-20 04:49:54,448 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-11-20 04:49:54,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-20 04:49:54,448 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-11-20 04:49:54,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 04:49:54,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 04:49:54,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-11-20 04:49:54,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 04:49:54,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 04:49:54,451 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-11-20 04:49:54,760 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 04:49:54,760 INFO L285 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-20 04:49:54,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:49:54 BoogieIcfgContainer [2019-11-20 04:49:54,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 04:49:54,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 04:49:54,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 04:49:54,765 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 04:49:54,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 04:49:53" (1/3) ... [2019-11-20 04:49:54,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e273df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:49:54, skipping insertion in model container [2019-11-20 04:49:54,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:49:54" (2/3) ... [2019-11-20 04:49:54,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e273df2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:49:54, skipping insertion in model container [2019-11-20 04:49:54,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:49:54" (3/3) ... [2019-11-20 04:49:54,769 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2019-11-20 04:49:54,810 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,810 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,811 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,811 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,811 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,812 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,812 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,812 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,812 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,813 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,813 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,813 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,813 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,814 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,814 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,814 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,814 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,815 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,815 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,815 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,815 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,816 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,816 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,817 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,817 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,818 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,818 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,818 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,818 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,818 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,819 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,819 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,819 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,819 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,820 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,820 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,820 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,820 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,820 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,821 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,821 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,821 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,822 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,822 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,822 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,822 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,822 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,823 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,823 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,823 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,823 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,824 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,824 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,824 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,824 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,824 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,825 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,825 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,825 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,825 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,826 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,826 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,826 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,826 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,826 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,827 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,827 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,827 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,827 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,828 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,828 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,828 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,828 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,828 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,829 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,829 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,829 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,829 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,830 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,830 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,830 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,830 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,830 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,831 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:49:54,863 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-11-20 04:49:54,863 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 04:49:54,869 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 04:49:54,879 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 04:49:54,894 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 04:49:54,894 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 04:49:54,894 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 04:49:54,894 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 04:49:54,894 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 04:49:54,894 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 04:49:54,895 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 04:49:54,895 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 04:49:54,904 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 95 places, 93 transitions [2019-11-20 04:49:55,743 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 8843 states. [2019-11-20 04:49:55,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8843 states. [2019-11-20 04:49:55,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 04:49:55,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:49:55,767 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:49:55,768 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:49:55,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:49:55,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1140660711, now seen corresponding path program 1 times [2019-11-20 04:49:55,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:49:55,782 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974688529] [2019-11-20 04:49:55,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:49:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:49:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:49:56,191 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974688529] [2019-11-20 04:49:56,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:49:56,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 04:49:56,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876165534] [2019-11-20 04:49:56,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 04:49:56,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:49:56,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 04:49:56,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:49:56,211 INFO L87 Difference]: Start difference. First operand 8843 states. Second operand 5 states. [2019-11-20 04:49:56,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:49:56,531 INFO L93 Difference]: Finished difference Result 15656 states and 45634 transitions. [2019-11-20 04:49:56,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 04:49:56,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-20 04:49:56,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:49:56,582 INFO L225 Difference]: With dead ends: 15656 [2019-11-20 04:49:56,582 INFO L226 Difference]: Without dead ends: 4154 [2019-11-20 04:49:56,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 04:49:56,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2019-11-20 04:49:56,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3146. [2019-11-20 04:49:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3146 states. [2019-11-20 04:49:56,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 8437 transitions. [2019-11-20 04:49:56,898 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 8437 transitions. Word has length 20 [2019-11-20 04:49:56,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:49:56,899 INFO L462 AbstractCegarLoop]: Abstraction has 3146 states and 8437 transitions. [2019-11-20 04:49:56,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 04:49:56,899 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 8437 transitions. [2019-11-20 04:49:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 04:49:56,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:49:56,906 INFO L410 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] [2019-11-20 04:49:56,906 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:49:56,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:49:56,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1489054159, now seen corresponding path program 1 times [2019-11-20 04:49:56,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:49:56,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076604884] [2019-11-20 04:49:56,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:49:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:49:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:49:57,045 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076604884] [2019-11-20 04:49:57,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:49:57,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 04:49:57,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169308740] [2019-11-20 04:49:57,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 04:49:57,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:49:57,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 04:49:57,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:49:57,048 INFO L87 Difference]: Start difference. First operand 3146 states and 8437 transitions. Second operand 5 states. [2019-11-20 04:49:57,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:49:57,290 INFO L93 Difference]: Finished difference Result 4721 states and 12028 transitions. [2019-11-20 04:49:57,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 04:49:57,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-20 04:49:57,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:49:57,311 INFO L225 Difference]: With dead ends: 4721 [2019-11-20 04:49:57,312 INFO L226 Difference]: Without dead ends: 2894 [2019-11-20 04:49:57,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-20 04:49:57,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2894 states. [2019-11-20 04:49:57,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2894 to 2894. [2019-11-20 04:49:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2894 states. [2019-11-20 04:49:57,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 7537 transitions. [2019-11-20 04:49:57,409 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 7537 transitions. Word has length 23 [2019-11-20 04:49:57,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:49:57,409 INFO L462 AbstractCegarLoop]: Abstraction has 2894 states and 7537 transitions. [2019-11-20 04:49:57,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 04:49:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 7537 transitions. [2019-11-20 04:49:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 04:49:57,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:49:57,412 INFO L410 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] [2019-11-20 04:49:57,412 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:49:57,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:49:57,412 INFO L82 PathProgramCache]: Analyzing trace with hash 913376083, now seen corresponding path program 1 times [2019-11-20 04:49:57,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:49:57,413 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640873155] [2019-11-20 04:49:57,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:49:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:49:57,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:49:57,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640873155] [2019-11-20 04:49:57,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:49:57,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 04:49:57,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676967985] [2019-11-20 04:49:57,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 04:49:57,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:49:57,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 04:49:57,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:49:57,493 INFO L87 Difference]: Start difference. First operand 2894 states and 7537 transitions. Second operand 5 states. [2019-11-20 04:49:57,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:49:57,578 INFO L93 Difference]: Finished difference Result 3587 states and 8923 transitions. [2019-11-20 04:49:57,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 04:49:57,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-20 04:49:57,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:49:57,595 INFO L225 Difference]: With dead ends: 3587 [2019-11-20 04:49:57,595 INFO L226 Difference]: Without dead ends: 2471 [2019-11-20 04:49:57,595 INFO L630 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 [2019-11-20 04:49:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-11-20 04:49:57,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2372. [2019-11-20 04:49:57,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2372 states. [2019-11-20 04:49:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 6091 transitions. [2019-11-20 04:49:57,661 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 6091 transitions. Word has length 23 [2019-11-20 04:49:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:49:57,662 INFO L462 AbstractCegarLoop]: Abstraction has 2372 states and 6091 transitions. [2019-11-20 04:49:57,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 04:49:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 6091 transitions. [2019-11-20 04:49:57,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 04:49:57,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:49:57,664 INFO L410 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, 1] [2019-11-20 04:49:57,664 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:49:57,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:49:57,665 INFO L82 PathProgramCache]: Analyzing trace with hash 597396229, now seen corresponding path program 1 times [2019-11-20 04:49:57,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:49:57,665 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022890893] [2019-11-20 04:49:57,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:49:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:49:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:49:57,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022890893] [2019-11-20 04:49:57,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:49:57,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-20 04:49:57,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808073885] [2019-11-20 04:49:57,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 04:49:57,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:49:57,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 04:49:57,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:49:57,767 INFO L87 Difference]: Start difference. First operand 2372 states and 6091 transitions. Second operand 6 states. [2019-11-20 04:49:58,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:49:58,107 INFO L93 Difference]: Finished difference Result 4676 states and 11587 transitions. [2019-11-20 04:49:58,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 04:49:58,108 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-20 04:49:58,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:49:58,126 INFO L225 Difference]: With dead ends: 4676 [2019-11-20 04:49:58,126 INFO L226 Difference]: Without dead ends: 2786 [2019-11-20 04:49:58,127 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-20 04:49:58,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2019-11-20 04:49:58,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2471. [2019-11-20 04:49:58,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2471 states. [2019-11-20 04:49:58,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2471 states to 2471 states and 6295 transitions. [2019-11-20 04:49:58,193 INFO L78 Accepts]: Start accepts. Automaton has 2471 states and 6295 transitions. Word has length 26 [2019-11-20 04:49:58,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:49:58,194 INFO L462 AbstractCegarLoop]: Abstraction has 2471 states and 6295 transitions. [2019-11-20 04:49:58,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 04:49:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2471 states and 6295 transitions. [2019-11-20 04:49:58,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 04:49:58,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:49:58,196 INFO L410 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, 1] [2019-11-20 04:49:58,196 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:49:58,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:49:58,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1891987234, now seen corresponding path program 1 times [2019-11-20 04:49:58,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:49:58,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103667678] [2019-11-20 04:49:58,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:49:58,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:49:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:49:58,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103667678] [2019-11-20 04:49:58,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510859997] [2019-11-20 04:49:58,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:49:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:49:58,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 04:49:58,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:49:58,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:49:58,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:49:58,435 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:49:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:49:58,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:49:58,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-20 04:49:58,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987317020] [2019-11-20 04:49:58,448 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 04:49:58,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:49:58,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 04:49:58,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 04:49:58,450 INFO L87 Difference]: Start difference. First operand 2471 states and 6295 transitions. Second operand 8 states. [2019-11-20 04:49:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:49:58,697 INFO L93 Difference]: Finished difference Result 5243 states and 12721 transitions. [2019-11-20 04:49:58,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 04:49:58,698 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-20 04:49:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:49:58,719 INFO L225 Difference]: With dead ends: 5243 [2019-11-20 04:49:58,720 INFO L226 Difference]: Without dead ends: 3542 [2019-11-20 04:49:58,721 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-20 04:49:58,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2019-11-20 04:49:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3182. [2019-11-20 04:49:58,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3182 states. [2019-11-20 04:49:58,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 7753 transitions. [2019-11-20 04:49:58,813 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 7753 transitions. Word has length 30 [2019-11-20 04:49:58,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:49:58,813 INFO L462 AbstractCegarLoop]: Abstraction has 3182 states and 7753 transitions. [2019-11-20 04:49:58,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 04:49:58,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 7753 transitions. [2019-11-20 04:49:58,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 04:49:58,817 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:49:58,817 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:49:59,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:49:59,029 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:49:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:49:59,029 INFO L82 PathProgramCache]: Analyzing trace with hash -843030555, now seen corresponding path program 1 times [2019-11-20 04:49:59,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:49:59,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483434822] [2019-11-20 04:49:59,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:49:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:49:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:49:59,155 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483434822] [2019-11-20 04:49:59,156 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539753541] [2019-11-20 04:49:59,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:49:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:49:59,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 04:49:59,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:49:59,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:49:59,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:49:59,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:49:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:49:59,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:49:59,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-20 04:49:59,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294323553] [2019-11-20 04:49:59,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 04:49:59,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:49:59,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 04:49:59,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-20 04:49:59,253 INFO L87 Difference]: Start difference. First operand 3182 states and 7753 transitions. Second operand 9 states. [2019-11-20 04:49:59,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:49:59,539 INFO L93 Difference]: Finished difference Result 5639 states and 13513 transitions. [2019-11-20 04:49:59,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 04:49:59,540 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-11-20 04:49:59,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:49:59,562 INFO L225 Difference]: With dead ends: 5639 [2019-11-20 04:49:59,562 INFO L226 Difference]: Without dead ends: 3938 [2019-11-20 04:49:59,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-11-20 04:49:59,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2019-11-20 04:49:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 2975. [2019-11-20 04:49:59,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2975 states. [2019-11-20 04:49:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 7303 transitions. [2019-11-20 04:49:59,665 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 7303 transitions. Word has length 34 [2019-11-20 04:49:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:49:59,666 INFO L462 AbstractCegarLoop]: Abstraction has 2975 states and 7303 transitions. [2019-11-20 04:49:59,666 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 04:49:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 7303 transitions. [2019-11-20 04:49:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 04:49:59,669 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:49:59,669 INFO L410 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, 1] [2019-11-20 04:49:59,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:49:59,873 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:49:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:49:59,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1601775870, now seen corresponding path program 2 times [2019-11-20 04:49:59,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:49:59,874 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915345878] [2019-11-20 04:49:59,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:49:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:00,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915345878] [2019-11-20 04:50:00,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015359190] [2019-11-20 04:50:00,015 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:00,097 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:50:00,097 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:50:00,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 04:50:00,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:00,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:00,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:00,137 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:00,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:00,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-20 04:50:00,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550804224] [2019-11-20 04:50:00,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 04:50:00,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:00,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 04:50:00,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:50:00,199 INFO L87 Difference]: Start difference. First operand 2975 states and 7303 transitions. Second operand 10 states. [2019-11-20 04:50:00,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:00,608 INFO L93 Difference]: Finished difference Result 6881 states and 16438 transitions. [2019-11-20 04:50:00,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 04:50:00,608 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2019-11-20 04:50:00,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:00,621 INFO L225 Difference]: With dead ends: 6881 [2019-11-20 04:50:00,621 INFO L226 Difference]: Without dead ends: 3794 [2019-11-20 04:50:00,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-11-20 04:50:00,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2019-11-20 04:50:00,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 2894. [2019-11-20 04:50:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2894 states. [2019-11-20 04:50:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 7135 transitions. [2019-11-20 04:50:00,696 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 7135 transitions. Word has length 38 [2019-11-20 04:50:00,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:00,697 INFO L462 AbstractCegarLoop]: Abstraction has 2894 states and 7135 transitions. [2019-11-20 04:50:00,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 04:50:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 7135 transitions. [2019-11-20 04:50:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-20 04:50:00,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:00,702 INFO L410 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, 1] [2019-11-20 04:50:00,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:00,917 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:00,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:00,918 INFO L82 PathProgramCache]: Analyzing trace with hash 2075284677, now seen corresponding path program 3 times [2019-11-20 04:50:00,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:00,918 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562134346] [2019-11-20 04:50:00,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:01,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:01,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562134346] [2019-11-20 04:50:01,050 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014354919] [2019-11-20 04:50:01,051 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:01,137 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 04:50:01,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:50:01,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 04:50:01,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:01,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:01,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:01,192 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:01,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:01,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-20 04:50:01,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385020888] [2019-11-20 04:50:01,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 04:50:01,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:01,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 04:50:01,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 04:50:01,197 INFO L87 Difference]: Start difference. First operand 2894 states and 7135 transitions. Second operand 11 states. [2019-11-20 04:50:01,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:01,606 INFO L93 Difference]: Finished difference Result 5855 states and 13945 transitions. [2019-11-20 04:50:01,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 04:50:01,607 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2019-11-20 04:50:01,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:01,615 INFO L225 Difference]: With dead ends: 5855 [2019-11-20 04:50:01,615 INFO L226 Difference]: Without dead ends: 3938 [2019-11-20 04:50:01,616 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-11-20 04:50:01,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2019-11-20 04:50:01,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3047. [2019-11-20 04:50:01,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3047 states. [2019-11-20 04:50:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3047 states to 3047 states and 7447 transitions. [2019-11-20 04:50:01,685 INFO L78 Accepts]: Start accepts. Automaton has 3047 states and 7447 transitions. Word has length 42 [2019-11-20 04:50:01,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:01,686 INFO L462 AbstractCegarLoop]: Abstraction has 3047 states and 7447 transitions. [2019-11-20 04:50:01,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 04:50:01,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3047 states and 7447 transitions. [2019-11-20 04:50:01,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-20 04:50:01,689 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:01,690 INFO L410 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, 1] [2019-11-20 04:50:01,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:01,898 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:01,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:01,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1009623326, now seen corresponding path program 4 times [2019-11-20 04:50:01,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:01,899 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869155692] [2019-11-20 04:50:01,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:02,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869155692] [2019-11-20 04:50:02,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099879992] [2019-11-20 04:50:02,013 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:02,083 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 04:50:02,084 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:50:02,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 04:50:02,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:02,105 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:02,106 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:02,107 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:02,111 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:02,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:02,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-20 04:50:02,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982626222] [2019-11-20 04:50:02,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 04:50:02,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:02,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 04:50:02,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-20 04:50:02,113 INFO L87 Difference]: Start difference. First operand 3047 states and 7447 transitions. Second operand 12 states. [2019-11-20 04:50:02,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:02,480 INFO L93 Difference]: Finished difference Result 6143 states and 14521 transitions. [2019-11-20 04:50:02,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 04:50:02,486 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2019-11-20 04:50:02,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:02,496 INFO L225 Difference]: With dead ends: 6143 [2019-11-20 04:50:02,496 INFO L226 Difference]: Without dead ends: 4226 [2019-11-20 04:50:02,496 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-11-20 04:50:02,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2019-11-20 04:50:02,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3182. [2019-11-20 04:50:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3182 states. [2019-11-20 04:50:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 7711 transitions. [2019-11-20 04:50:02,567 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 7711 transitions. Word has length 46 [2019-11-20 04:50:02,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:02,569 INFO L462 AbstractCegarLoop]: Abstraction has 3182 states and 7711 transitions. [2019-11-20 04:50:02,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 04:50:02,569 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 7711 transitions. [2019-11-20 04:50:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-20 04:50:02,573 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:02,573 INFO L410 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, 1] [2019-11-20 04:50:02,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:02,776 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:02,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:02,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1638831707, now seen corresponding path program 5 times [2019-11-20 04:50:02,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:02,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214771147] [2019-11-20 04:50:02,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:02,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214771147] [2019-11-20 04:50:02,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904098976] [2019-11-20 04:50:02,944 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:03,008 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-20 04:50:03,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:50:03,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 04:50:03,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:03,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:03,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:03,053 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:03,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:03,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-20 04:50:03,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676879741] [2019-11-20 04:50:03,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 04:50:03,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:03,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 04:50:03,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-20 04:50:03,059 INFO L87 Difference]: Start difference. First operand 3182 states and 7711 transitions. Second operand 13 states. [2019-11-20 04:50:03,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:03,428 INFO L93 Difference]: Finished difference Result 6575 states and 15385 transitions. [2019-11-20 04:50:03,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 04:50:03,429 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2019-11-20 04:50:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:03,438 INFO L225 Difference]: With dead ends: 6575 [2019-11-20 04:50:03,439 INFO L226 Difference]: Without dead ends: 4874 [2019-11-20 04:50:03,439 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-11-20 04:50:03,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2019-11-20 04:50:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 4622. [2019-11-20 04:50:03,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4622 states. [2019-11-20 04:50:03,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 10633 transitions. [2019-11-20 04:50:03,578 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 10633 transitions. Word has length 50 [2019-11-20 04:50:03,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:03,578 INFO L462 AbstractCegarLoop]: Abstraction has 4622 states and 10633 transitions. [2019-11-20 04:50:03,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 04:50:03,578 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 10633 transitions. [2019-11-20 04:50:03,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-20 04:50:03,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:03,584 INFO L410 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, 1] [2019-11-20 04:50:03,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:03,790 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:03,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:03,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1049102018, now seen corresponding path program 6 times [2019-11-20 04:50:03,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:03,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725594810] [2019-11-20 04:50:03,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:03,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725594810] [2019-11-20 04:50:03,954 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216444347] [2019-11-20 04:50:03,954 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:04,038 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-20 04:50:04,038 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:50:04,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 04:50:04,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:04,069 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:04,070 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:04,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:04,075 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:04,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:04,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-20 04:50:04,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950114091] [2019-11-20 04:50:04,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 04:50:04,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:04,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 04:50:04,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-20 04:50:04,076 INFO L87 Difference]: Start difference. First operand 4622 states and 10633 transitions. Second operand 14 states. [2019-11-20 04:50:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:04,496 INFO L93 Difference]: Finished difference Result 6935 states and 16105 transitions. [2019-11-20 04:50:04,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 04:50:04,496 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-11-20 04:50:04,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:04,503 INFO L225 Difference]: With dead ends: 6935 [2019-11-20 04:50:04,503 INFO L226 Difference]: Without dead ends: 5234 [2019-11-20 04:50:04,504 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2019-11-20 04:50:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5234 states. [2019-11-20 04:50:04,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5234 to 3686. [2019-11-20 04:50:04,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3686 states. [2019-11-20 04:50:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 8719 transitions. [2019-11-20 04:50:04,571 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 8719 transitions. Word has length 54 [2019-11-20 04:50:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:04,571 INFO L462 AbstractCegarLoop]: Abstraction has 3686 states and 8719 transitions. [2019-11-20 04:50:04,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 04:50:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 8719 transitions. [2019-11-20 04:50:04,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-20 04:50:04,575 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:04,576 INFO L410 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, 1] [2019-11-20 04:50:04,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:04,786 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:04,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:04,787 INFO L82 PathProgramCache]: Analyzing trace with hash -964845947, now seen corresponding path program 7 times [2019-11-20 04:50:04,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:04,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767441459] [2019-11-20 04:50:04,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:04,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767441459] [2019-11-20 04:50:04,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394953432] [2019-11-20 04:50:04,920 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:04,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 04:50:04,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:04,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:04,997 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:04,998 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:05,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:05,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-20 04:50:05,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468832589] [2019-11-20 04:50:05,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 04:50:05,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:05,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 04:50:05,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-20 04:50:05,003 INFO L87 Difference]: Start difference. First operand 3686 states and 8719 transitions. Second operand 15 states. [2019-11-20 04:50:05,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:05,438 INFO L93 Difference]: Finished difference Result 8321 states and 19318 transitions. [2019-11-20 04:50:05,439 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 04:50:05,439 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-11-20 04:50:05,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:05,443 INFO L225 Difference]: With dead ends: 8321 [2019-11-20 04:50:05,443 INFO L226 Difference]: Without dead ends: 5450 [2019-11-20 04:50:05,443 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2019-11-20 04:50:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2019-11-20 04:50:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 5198. [2019-11-20 04:50:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5198 states. [2019-11-20 04:50:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5198 states to 5198 states and 11785 transitions. [2019-11-20 04:50:05,515 INFO L78 Accepts]: Start accepts. Automaton has 5198 states and 11785 transitions. Word has length 58 [2019-11-20 04:50:05,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:05,515 INFO L462 AbstractCegarLoop]: Abstraction has 5198 states and 11785 transitions. [2019-11-20 04:50:05,515 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 04:50:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 5198 states and 11785 transitions. [2019-11-20 04:50:05,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-20 04:50:05,524 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:05,524 INFO L410 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, 1] [2019-11-20 04:50:05,726 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:05,730 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:05,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1803039070, now seen corresponding path program 8 times [2019-11-20 04:50:05,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:05,730 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830566000] [2019-11-20 04:50:05,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:05,920 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:05,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830566000] [2019-11-20 04:50:05,920 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172363472] [2019-11-20 04:50:05,920 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:05,984 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:50:05,985 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:50:05,986 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 04:50:05,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:06,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:06,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:06,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:06,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:06,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-20 04:50:06,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517549000] [2019-11-20 04:50:06,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 04:50:06,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:06,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 04:50:06,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-11-20 04:50:06,032 INFO L87 Difference]: Start difference. First operand 5198 states and 11785 transitions. Second operand 16 states. [2019-11-20 04:50:06,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:06,597 INFO L93 Difference]: Finished difference Result 8645 states and 19966 transitions. [2019-11-20 04:50:06,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 04:50:06,597 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2019-11-20 04:50:06,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:06,603 INFO L225 Difference]: With dead ends: 8645 [2019-11-20 04:50:06,603 INFO L226 Difference]: Without dead ends: 5990 [2019-11-20 04:50:06,604 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2019-11-20 04:50:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2019-11-20 04:50:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5486. [2019-11-20 04:50:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5486 states. [2019-11-20 04:50:06,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 12361 transitions. [2019-11-20 04:50:06,686 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 12361 transitions. Word has length 62 [2019-11-20 04:50:06,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:06,686 INFO L462 AbstractCegarLoop]: Abstraction has 5486 states and 12361 transitions. [2019-11-20 04:50:06,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 04:50:06,686 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 12361 transitions. [2019-11-20 04:50:06,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-20 04:50:06,698 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:06,699 INFO L410 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, 1] [2019-11-20 04:50:06,901 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:06,902 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:06,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1525222555, now seen corresponding path program 9 times [2019-11-20 04:50:06,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:06,903 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284510272] [2019-11-20 04:50:06,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:06,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:07,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284510272] [2019-11-20 04:50:07,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960172110] [2019-11-20 04:50:07,116 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:07,191 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-20 04:50:07,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:50:07,193 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 04:50:07,195 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:07,229 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:07,229 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:07,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:07,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:07,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-20 04:50:07,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692782315] [2019-11-20 04:50:07,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 04:50:07,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:07,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 04:50:07,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-20 04:50:07,242 INFO L87 Difference]: Start difference. First operand 5486 states and 12361 transitions. Second operand 17 states. [2019-11-20 04:50:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:07,788 INFO L93 Difference]: Finished difference Result 7799 states and 17833 transitions. [2019-11-20 04:50:07,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 04:50:07,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2019-11-20 04:50:07,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:07,795 INFO L225 Difference]: With dead ends: 7799 [2019-11-20 04:50:07,795 INFO L226 Difference]: Without dead ends: 5882 [2019-11-20 04:50:07,796 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2019-11-20 04:50:07,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5882 states. [2019-11-20 04:50:07,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5882 to 5774. [2019-11-20 04:50:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5774 states. [2019-11-20 04:50:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5774 states to 5774 states and 12937 transitions. [2019-11-20 04:50:07,870 INFO L78 Accepts]: Start accepts. Automaton has 5774 states and 12937 transitions. Word has length 66 [2019-11-20 04:50:07,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:07,871 INFO L462 AbstractCegarLoop]: Abstraction has 5774 states and 12937 transitions. [2019-11-20 04:50:07,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 04:50:07,871 INFO L276 IsEmpty]: Start isEmpty. Operand 5774 states and 12937 transitions. [2019-11-20 04:50:07,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-20 04:50:07,880 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:07,880 INFO L410 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, 1] [2019-11-20 04:50:08,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:08,083 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:08,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:08,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1773254274, now seen corresponding path program 10 times [2019-11-20 04:50:08,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:08,083 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045356381] [2019-11-20 04:50:08,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:08,307 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:08,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045356381] [2019-11-20 04:50:08,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316690041] [2019-11-20 04:50:08,308 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:08,376 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 04:50:08,376 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:50:08,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 04:50:08,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:08,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:08,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:08,408 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:08,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:08,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-20 04:50:08,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374108686] [2019-11-20 04:50:08,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 04:50:08,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:08,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 04:50:08,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-11-20 04:50:08,418 INFO L87 Difference]: Start difference. First operand 5774 states and 12937 transitions. Second operand 18 states. [2019-11-20 04:50:08,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:08,941 INFO L93 Difference]: Finished difference Result 9221 states and 21118 transitions. [2019-11-20 04:50:08,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 04:50:08,942 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2019-11-20 04:50:08,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:08,946 INFO L225 Difference]: With dead ends: 9221 [2019-11-20 04:50:08,946 INFO L226 Difference]: Without dead ends: 6566 [2019-11-20 04:50:08,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2019-11-20 04:50:08,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6566 states. [2019-11-20 04:50:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6566 to 6062. [2019-11-20 04:50:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6062 states. [2019-11-20 04:50:09,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6062 states to 6062 states and 13513 transitions. [2019-11-20 04:50:09,023 INFO L78 Accepts]: Start accepts. Automaton has 6062 states and 13513 transitions. Word has length 70 [2019-11-20 04:50:09,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:09,023 INFO L462 AbstractCegarLoop]: Abstraction has 6062 states and 13513 transitions. [2019-11-20 04:50:09,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 04:50:09,023 INFO L276 IsEmpty]: Start isEmpty. Operand 6062 states and 13513 transitions. [2019-11-20 04:50:09,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-20 04:50:09,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:09,032 INFO L410 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, 1] [2019-11-20 04:50:09,235 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:09,235 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:09,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:09,236 INFO L82 PathProgramCache]: Analyzing trace with hash 184379461, now seen corresponding path program 11 times [2019-11-20 04:50:09,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:09,236 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568373399] [2019-11-20 04:50:09,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:09,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568373399] [2019-11-20 04:50:09,452 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176075665] [2019-11-20 04:50:09,452 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:09,581 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-20 04:50:09,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:50:09,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 04:50:09,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:09,607 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:09,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:09,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:09,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:09,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-20 04:50:09,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495171747] [2019-11-20 04:50:09,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 04:50:09,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:09,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 04:50:09,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-11-20 04:50:09,617 INFO L87 Difference]: Start difference. First operand 6062 states and 13513 transitions. Second operand 19 states. [2019-11-20 04:50:10,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:10,102 INFO L93 Difference]: Finished difference Result 8519 states and 19273 transitions. [2019-11-20 04:50:10,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-20 04:50:10,103 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 74 [2019-11-20 04:50:10,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:10,108 INFO L225 Difference]: With dead ends: 8519 [2019-11-20 04:50:10,108 INFO L226 Difference]: Without dead ends: 6818 [2019-11-20 04:50:10,108 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=837, Unknown=0, NotChecked=0, Total=1190 [2019-11-20 04:50:10,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6818 states. [2019-11-20 04:50:10,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6818 to 4415. [2019-11-20 04:50:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4415 states. [2019-11-20 04:50:10,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4415 states to 4415 states and 10183 transitions. [2019-11-20 04:50:10,169 INFO L78 Accepts]: Start accepts. Automaton has 4415 states and 10183 transitions. Word has length 74 [2019-11-20 04:50:10,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:10,169 INFO L462 AbstractCegarLoop]: Abstraction has 4415 states and 10183 transitions. [2019-11-20 04:50:10,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 04:50:10,169 INFO L276 IsEmpty]: Start isEmpty. Operand 4415 states and 10183 transitions. [2019-11-20 04:50:10,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-20 04:50:10,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:10,173 INFO L410 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, 1] [2019-11-20 04:50:10,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:10,373 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:10,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2115649950, now seen corresponding path program 12 times [2019-11-20 04:50:10,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:10,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486513037] [2019-11-20 04:50:10,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:10,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486513037] [2019-11-20 04:50:10,581 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114874805] [2019-11-20 04:50:10,581 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:10,660 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-20 04:50:10,660 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:50:10,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 04:50:10,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:10,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:10,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:10,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:10,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:10,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-20 04:50:10,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121452555] [2019-11-20 04:50:10,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 04:50:10,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:10,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 04:50:10,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-11-20 04:50:10,701 INFO L87 Difference]: Start difference. First operand 4415 states and 10183 transitions. Second operand 20 states. [2019-11-20 04:50:11,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:11,296 INFO L93 Difference]: Finished difference Result 9761 states and 22198 transitions. [2019-11-20 04:50:11,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 04:50:11,297 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2019-11-20 04:50:11,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:11,302 INFO L225 Difference]: With dead ends: 9761 [2019-11-20 04:50:11,302 INFO L226 Difference]: Without dead ends: 7106 [2019-11-20 04:50:11,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2019-11-20 04:50:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7106 states. [2019-11-20 04:50:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7106 to 4550. [2019-11-20 04:50:11,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4550 states. [2019-11-20 04:50:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4550 states to 4550 states and 10447 transitions. [2019-11-20 04:50:11,366 INFO L78 Accepts]: Start accepts. Automaton has 4550 states and 10447 transitions. Word has length 78 [2019-11-20 04:50:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:11,366 INFO L462 AbstractCegarLoop]: Abstraction has 4550 states and 10447 transitions. [2019-11-20 04:50:11,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 04:50:11,366 INFO L276 IsEmpty]: Start isEmpty. Operand 4550 states and 10447 transitions. [2019-11-20 04:50:11,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-20 04:50:11,371 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:11,371 INFO L410 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, 1] [2019-11-20 04:50:11,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:11,574 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:11,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:11,575 INFO L82 PathProgramCache]: Analyzing trace with hash -384762587, now seen corresponding path program 13 times [2019-11-20 04:50:11,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:11,575 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658879014] [2019-11-20 04:50:11,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:11,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658879014] [2019-11-20 04:50:11,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84586783] [2019-11-20 04:50:11,843 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:11,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 04:50:11,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:11,930 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:11,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:11,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:11,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:11,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-20 04:50:11,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540036859] [2019-11-20 04:50:11,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 04:50:11,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:11,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 04:50:11,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2019-11-20 04:50:11,941 INFO L87 Difference]: Start difference. First operand 4550 states and 10447 transitions. Second operand 21 states. [2019-11-20 04:50:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:12,627 INFO L93 Difference]: Finished difference Result 10049 states and 22774 transitions. [2019-11-20 04:50:12,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-20 04:50:12,628 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2019-11-20 04:50:12,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:12,634 INFO L225 Difference]: With dead ends: 10049 [2019-11-20 04:50:12,634 INFO L226 Difference]: Without dead ends: 7178 [2019-11-20 04:50:12,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=451, Invalid=1109, Unknown=0, NotChecked=0, Total=1560 [2019-11-20 04:50:12,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7178 states. [2019-11-20 04:50:12,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7178 to 6926. [2019-11-20 04:50:12,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6926 states. [2019-11-20 04:50:12,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6926 states to 6926 states and 15241 transitions. [2019-11-20 04:50:12,754 INFO L78 Accepts]: Start accepts. Automaton has 6926 states and 15241 transitions. Word has length 82 [2019-11-20 04:50:12,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:12,754 INFO L462 AbstractCegarLoop]: Abstraction has 6926 states and 15241 transitions. [2019-11-20 04:50:12,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 04:50:12,754 INFO L276 IsEmpty]: Start isEmpty. Operand 6926 states and 15241 transitions. [2019-11-20 04:50:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-20 04:50:12,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:12,760 INFO L410 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, 1] [2019-11-20 04:50:12,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:12,960 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:12,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:12,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1056709054, now seen corresponding path program 14 times [2019-11-20 04:50:12,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:12,961 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449842964] [2019-11-20 04:50:12,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:12,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:13,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449842964] [2019-11-20 04:50:13,218 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086245932] [2019-11-20 04:50:13,218 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:13,288 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:50:13,288 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:50:13,289 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 04:50:13,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:13,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:13,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:13,344 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:13,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:13,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-20 04:50:13,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37132782] [2019-11-20 04:50:13,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 04:50:13,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:13,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 04:50:13,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-11-20 04:50:13,354 INFO L87 Difference]: Start difference. First operand 6926 states and 15241 transitions. Second operand 22 states. [2019-11-20 04:50:14,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:14,031 INFO L93 Difference]: Finished difference Result 10373 states and 23422 transitions. [2019-11-20 04:50:14,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-20 04:50:14,032 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2019-11-20 04:50:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:14,037 INFO L225 Difference]: With dead ends: 10373 [2019-11-20 04:50:14,038 INFO L226 Difference]: Without dead ends: 7718 [2019-11-20 04:50:14,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2019-11-20 04:50:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7718 states. [2019-11-20 04:50:14,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7718 to 7214. [2019-11-20 04:50:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7214 states. [2019-11-20 04:50:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7214 states to 7214 states and 15817 transitions. [2019-11-20 04:50:14,111 INFO L78 Accepts]: Start accepts. Automaton has 7214 states and 15817 transitions. Word has length 86 [2019-11-20 04:50:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:14,111 INFO L462 AbstractCegarLoop]: Abstraction has 7214 states and 15817 transitions. [2019-11-20 04:50:14,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 04:50:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 7214 states and 15817 transitions. [2019-11-20 04:50:14,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-20 04:50:14,118 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:14,118 INFO L410 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, 1] [2019-11-20 04:50:14,322 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:14,322 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:14,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:14,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1345434117, now seen corresponding path program 15 times [2019-11-20 04:50:14,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:14,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730185618] [2019-11-20 04:50:14,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:14,634 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:14,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730185618] [2019-11-20 04:50:14,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090667182] [2019-11-20 04:50:14,635 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:14,704 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-20 04:50:14,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:50:14,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 04:50:14,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:14,765 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:14,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:14,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:14,775 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:14,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:14,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-20 04:50:14,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281187894] [2019-11-20 04:50:14,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-20 04:50:14,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:14,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-20 04:50:14,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2019-11-20 04:50:14,779 INFO L87 Difference]: Start difference. First operand 7214 states and 15817 transitions. Second operand 23 states. [2019-11-20 04:50:15,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:15,444 INFO L93 Difference]: Finished difference Result 9527 states and 21289 transitions. [2019-11-20 04:50:15,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-20 04:50:15,444 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2019-11-20 04:50:15,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:15,450 INFO L225 Difference]: With dead ends: 9527 [2019-11-20 04:50:15,450 INFO L226 Difference]: Without dead ends: 7610 [2019-11-20 04:50:15,451 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2019-11-20 04:50:15,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7610 states. [2019-11-20 04:50:15,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7610 to 7502. [2019-11-20 04:50:15,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7502 states. [2019-11-20 04:50:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 16393 transitions. [2019-11-20 04:50:15,517 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 16393 transitions. Word has length 90 [2019-11-20 04:50:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:15,517 INFO L462 AbstractCegarLoop]: Abstraction has 7502 states and 16393 transitions. [2019-11-20 04:50:15,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-20 04:50:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 16393 transitions. [2019-11-20 04:50:15,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-20 04:50:15,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:15,525 INFO L410 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, 1] [2019-11-20 04:50:15,728 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:15,728 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:15,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:15,728 INFO L82 PathProgramCache]: Analyzing trace with hash 720121378, now seen corresponding path program 16 times [2019-11-20 04:50:15,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:15,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960254099] [2019-11-20 04:50:15,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:15,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960254099] [2019-11-20 04:50:15,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122744610] [2019-11-20 04:50:15,979 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:16,047 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 04:50:16,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:50:16,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 04:50:16,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:16,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:16,086 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:16,087 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:16,098 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:16,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:16,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-20 04:50:16,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382845024] [2019-11-20 04:50:16,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-20 04:50:16,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:16,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-20 04:50:16,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-11-20 04:50:16,100 INFO L87 Difference]: Start difference. First operand 7502 states and 16393 transitions. Second operand 24 states. [2019-11-20 04:50:17,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:17,201 INFO L93 Difference]: Finished difference Result 9815 states and 21865 transitions. [2019-11-20 04:50:17,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-20 04:50:17,202 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 94 [2019-11-20 04:50:17,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:17,210 INFO L225 Difference]: With dead ends: 9815 [2019-11-20 04:50:17,211 INFO L226 Difference]: Without dead ends: 7682 [2019-11-20 04:50:17,211 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=557, Invalid=1335, Unknown=0, NotChecked=0, Total=1892 [2019-11-20 04:50:17,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7682 states. [2019-11-20 04:50:17,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7682 to 7538. [2019-11-20 04:50:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7538 states. [2019-11-20 04:50:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7538 states to 7538 states and 16429 transitions. [2019-11-20 04:50:17,301 INFO L78 Accepts]: Start accepts. Automaton has 7538 states and 16429 transitions. Word has length 94 [2019-11-20 04:50:17,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:17,302 INFO L462 AbstractCegarLoop]: Abstraction has 7538 states and 16429 transitions. [2019-11-20 04:50:17,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-20 04:50:17,302 INFO L276 IsEmpty]: Start isEmpty. Operand 7538 states and 16429 transitions. [2019-11-20 04:50:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-20 04:50:17,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:17,313 INFO L410 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, 1] [2019-11-20 04:50:17,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:17,525 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:17,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:17,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1899988709, now seen corresponding path program 17 times [2019-11-20 04:50:17,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:17,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497647894] [2019-11-20 04:50:17,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:17,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:17,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497647894] [2019-11-20 04:50:17,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388421143] [2019-11-20 04:50:17,893 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/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 [2019-11-20 04:50:17,983 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-20 04:50:17,983 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:50:17,985 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-20 04:50:17,987 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:18,058 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:18,059 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:18,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:50:18,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:50:18,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-20 04:50:18,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433759411] [2019-11-20 04:50:18,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-20 04:50:18,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:50:18,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-20 04:50:18,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2019-11-20 04:50:18,072 INFO L87 Difference]: Start difference. First operand 7538 states and 16429 transitions. Second operand 25 states. [2019-11-20 04:50:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:18,980 INFO L93 Difference]: Finished difference Result 9887 states and 22009 transitions. [2019-11-20 04:50:18,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-20 04:50:18,981 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 98 [2019-11-20 04:50:18,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:18,986 INFO L225 Difference]: With dead ends: 9887 [2019-11-20 04:50:18,987 INFO L226 Difference]: Without dead ends: 8186 [2019-11-20 04:50:18,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=647, Invalid=1515, Unknown=0, NotChecked=0, Total=2162 [2019-11-20 04:50:18,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8186 states. [2019-11-20 04:50:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8186 to 7934. [2019-11-20 04:50:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7934 states. [2019-11-20 04:50:19,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 17257 transitions. [2019-11-20 04:50:19,067 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 17257 transitions. Word has length 98 [2019-11-20 04:50:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:19,068 INFO L462 AbstractCegarLoop]: Abstraction has 7934 states and 17257 transitions. [2019-11-20 04:50:19,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-20 04:50:19,068 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 17257 transitions. [2019-11-20 04:50:19,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-20 04:50:19,076 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:19,076 INFO L410 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, 1] [2019-11-20 04:50:19,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:50:19,279 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:50:19,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:19,279 INFO L82 PathProgramCache]: Analyzing trace with hash -706280987, now seen corresponding path program 18 times [2019-11-20 04:50:19,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:50:19,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356743645] [2019-11-20 04:50:19,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:50:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:50:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 04:50:19,348 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 04:50:19,348 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 04:50:19,440 INFO L304 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2019-11-20 04:50:19,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 04:50:19 BasicIcfg [2019-11-20 04:50:19,442 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 04:50:19,443 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 04:50:19,443 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 04:50:19,443 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 04:50:19,444 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:49:54" (3/4) ... [2019-11-20 04:50:19,446 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 04:50:19,572 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_66fec228-ed7a-41a6-880f-2f58c5790ebf/bin/uautomizer/witness.graphml [2019-11-20 04:50:19,572 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 04:50:19,575 INFO L168 Benchmark]: Toolchain (without parser) took 25866.43 ms. Allocated memory was 1.0 GB in the beginning and 1.8 GB in the end (delta: 739.8 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -171.3 MB). Peak memory consumption was 568.5 MB. Max. memory is 11.5 GB. [2019-11-20 04:50:19,575 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:50:19,576 INFO L168 Benchmark]: CACSL2BoogieTranslator took 609.92 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -121.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-20 04:50:19,577 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.36 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. [2019-11-20 04:50:19,577 INFO L168 Benchmark]: Boogie Preprocessor took 24.80 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:50:19,577 INFO L168 Benchmark]: RCFGBuilder took 376.18 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 11.5 GB. [2019-11-20 04:50:19,578 INFO L168 Benchmark]: TraceAbstraction took 24680.05 ms. Allocated memory was 1.1 GB in the beginning and 1.8 GB in the end (delta: 642.8 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -129.4 MB). Peak memory consumption was 513.4 MB. Max. memory is 11.5 GB. [2019-11-20 04:50:19,578 INFO L168 Benchmark]: Witness Printer took 129.66 ms. Allocated memory is still 1.8 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 42.7 MB). Peak memory consumption was 42.7 MB. Max. memory is 11.5 GB. [2019-11-20 04:50:19,580 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 609.92 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 97.0 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -121.1 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 38.36 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.80 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 376.18 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 24680.05 ms. Allocated memory was 1.1 GB in the beginning and 1.8 GB in the end (delta: 642.8 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -129.4 MB). Peak memory consumption was 513.4 MB. Max. memory is 11.5 GB. * Witness Printer took 129.66 ms. Allocated memory is still 1.8 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 42.7 MB). Peak memory consumption was 42.7 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] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [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=7, j=6, k=0, k=0] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, 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=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=0] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=0] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, 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=9, j=10, k=2, 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=11, j=10, k=1, k=2] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=1] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, 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=11, j=12, k=2, 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=2] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=2] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, 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=13, j=14, k=4, 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=15, j=14, k=3, k=4] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=3, k=5] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, 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=15, j=16, k=4, 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=4, k=5] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=4] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, 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=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=5, k=6] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=5] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, 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=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=6, k=7] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=6, k=8] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, 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=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=7] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=7, k=9] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, 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=9, 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=25, j=24, k=8, k=9] [L685] 2 k++ 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 9 procedures, 101 locations, 1 error locations. Result: UNSAFE, OverallTime: 24.5s, OverallIterations: 23, TraceHistogramMax: 10, AutomataDifference: 11.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 3090 SDtfs, 22170 SDslu, 19702 SDs, 0 SdLazy, 3987 SolverSat, 4710 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1691 GetRequests, 1160 SyntacticMatches, 0 SemanticMatches, 531 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 7.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8843occurred 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: 1.9s AutomataMinimizationTime, 22 MinimizatonAttempts, 14967 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 2494 NumberOfCodeBlocks, 2494 NumberOfCodeBlocksAsserted, 91 NumberOfCheckSat, 2356 ConstructedInterpolants, 0 QuantifiedInterpolants, 481966 SizeOfPredicates, 261 NumberOfNonLiveVariables, 2826 ConjunctsInSsa, 322 ConjunctsInUnsatCore, 40 InterpolantComputations, 4 PerfectInterpolantSequences, 0/3894 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...