./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 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 0.1.24-6b5699a [2019-11-25 08:52:43,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:52:43,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:52:43,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:52:43,057 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:52:43,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:52:43,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:52:43,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:52:43,072 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:52:43,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:52:43,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:52:43,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:52:43,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:52:43,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:52:43,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:52:43,083 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:52:43,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:52:43,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:52:43,087 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:52:43,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:52:43,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:52:43,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:52:43,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:52:43,099 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:52:43,102 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:52:43,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:52:43,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:52:43,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:52:43,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:52:43,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:52:43,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:52:43,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:52:43,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:52:43,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:52:43,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:52:43,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:52:43,109 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:52:43,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:52:43,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:52:43,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:52:43,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:52:43,111 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-25 08:52:43,136 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:52:43,136 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:52:43,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:52:43,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:52:43,137 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:52:43,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:52:43,138 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:52:43,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:52:43,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:52:43,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:52:43,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-25 08:52:43,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:52:43,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-25 08:52:43,139 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:52:43,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:52:43,139 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:52:43,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-25 08:52:43,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:52:43,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:52:43,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:52:43,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:52:43,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:52:43,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:52:43,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:52:43,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-25 08:52:43,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:52:43,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-25 08:52:43,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-25 08:52:43,142 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_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:43,328 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:52:43,344 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:52:43,347 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:52:43,348 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:52:43,349 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:52:43,350 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longer-2.i [2019-11-25 08:52:43,413 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/bin/uautomizer/data/c2d6f3d9b/86fcc8f557a741b1817834d7692da408/FLAG1549576e8 [2019-11-25 08:52:43,875 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:52:43,876 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/sv-benchmarks/c/pthread/triangular-longer-2.i [2019-11-25 08:52:43,892 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/bin/uautomizer/data/c2d6f3d9b/86fcc8f557a741b1817834d7692da408/FLAG1549576e8 [2019-11-25 08:52:44,219 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/bin/uautomizer/data/c2d6f3d9b/86fcc8f557a741b1817834d7692da408 [2019-11-25 08:52:44,221 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:52:44,223 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:52:44,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:52:44,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:52:44,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:52:44,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:52:44" (1/1) ... [2019-11-25 08:52:44,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5854b3c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:44, skipping insertion in model container [2019-11-25 08:52:44,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:52:44" (1/1) ... [2019-11-25 08:52:44,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:52:44,276 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:52:44,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:52:44,736 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:52:44,803 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:52:44,888 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:52:44,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:44 WrapperNode [2019-11-25 08:52:44,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:52:44,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:52:44,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:52:44,890 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:52:44,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:44" (1/1) ... [2019-11-25 08:52:44,910 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:44" (1/1) ... [2019-11-25 08:52:44,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:52:44,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:52:44,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:52:44,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:52:44,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:44" (1/1) ... [2019-11-25 08:52:44,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:44" (1/1) ... [2019-11-25 08:52:44,941 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:44" (1/1) ... [2019-11-25 08:52:44,941 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:44" (1/1) ... [2019-11-25 08:52:44,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:44" (1/1) ... [2019-11-25 08:52:44,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:44" (1/1) ... [2019-11-25 08:52:44,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:44" (1/1) ... [2019-11-25 08:52:44,957 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:52:44,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:52:44,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:52:44,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:52:44,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:45,018 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-11-25 08:52:45,018 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-11-25 08:52:45,019 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-11-25 08:52:45,019 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-11-25 08:52:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-25 08:52:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-11-25 08:52:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-25 08:52:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:52:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-11-25 08:52:45,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:52:45,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:52:45,023 WARN L202 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-11-25 08:52:45,438 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:52:45,438 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-25 08:52:45,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:52:45 BoogieIcfgContainer [2019-11-25 08:52:45,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:52:45,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:52:45,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:52:45,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:52:45,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:52:44" (1/3) ... [2019-11-25 08:52:45,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1164ccb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:52:45, skipping insertion in model container [2019-11-25 08:52:45,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:44" (2/3) ... [2019-11-25 08:52:45,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1164ccb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:52:45, skipping insertion in model container [2019-11-25 08:52:45,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:52:45" (3/3) ... [2019-11-25 08:52:45,446 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2019-11-25 08:52:45,482 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,482 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,482 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,482 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,483 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,483 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,483 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,484 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,484 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,484 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,484 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,485 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,485 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,485 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,485 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,485 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,486 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,486 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,486 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,487 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,487 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,487 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,487 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,488 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,488 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,488 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,488 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,488 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,489 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,489 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,489 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,489 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,489 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,490 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,490 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,490 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,490 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,490 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,491 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,491 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,491 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,491 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,492 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,492 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,492 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,492 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,492 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,492 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,493 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,493 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,493 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,493 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,493 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,494 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,494 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,494 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,494 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,494 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,495 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,495 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,495 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,495 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,495 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,496 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,496 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,496 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,496 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,496 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,497 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,497 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,497 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,497 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,497 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,498 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,498 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,498 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,498 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,498 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,499 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,499 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,499 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,499 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,499 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,500 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-25 08:52:45,527 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-11-25 08:52:45,527 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:52:45,533 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-25 08:52:45,541 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-25 08:52:45,556 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:52:45,556 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-25 08:52:45,556 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:52:45,557 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:52:45,557 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:52:45,557 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:52:45,557 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:52:45,557 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:52:45,567 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 95 places, 93 transitions [2019-11-25 08:52:45,671 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1013 states. [2019-11-25 08:52:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states. [2019-11-25 08:52:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-25 08:52:45,681 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:45,682 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] [2019-11-25 08:52:45,682 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:45,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:45,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1140660711, now seen corresponding path program 1 times [2019-11-25 08:52:45,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:45,696 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219743074] [2019-11-25 08:52:45,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:45,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219743074] [2019-11-25 08:52:45,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:45,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:52:45,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679292812] [2019-11-25 08:52:46,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:52:46,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:46,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:52:46,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:52:46,016 INFO L87 Difference]: Start difference. First operand 1013 states. Second operand 5 states. [2019-11-25 08:52:46,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:46,197 INFO L93 Difference]: Finished difference Result 1778 states and 5126 transitions. [2019-11-25 08:52:46,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:52:46,198 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-25 08:52:46,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:46,228 INFO L225 Difference]: With dead ends: 1778 [2019-11-25 08:52:46,229 INFO L226 Difference]: Without dead ends: 500 [2019-11-25 08:52:46,230 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 [2019-11-25 08:52:46,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2019-11-25 08:52:46,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 388. [2019-11-25 08:52:46,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2019-11-25 08:52:46,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 993 transitions. [2019-11-25 08:52:46,332 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 993 transitions. Word has length 20 [2019-11-25 08:52:46,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:46,332 INFO L462 AbstractCegarLoop]: Abstraction has 388 states and 993 transitions. [2019-11-25 08:52:46,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:52:46,333 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 993 transitions. [2019-11-25 08:52:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:52:46,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:46,335 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] [2019-11-25 08:52:46,336 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:46,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:46,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1489054159, now seen corresponding path program 1 times [2019-11-25 08:52:46,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:46,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146980584] [2019-11-25 08:52:46,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:46,498 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146980584] [2019-11-25 08:52:46,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:46,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:52:46,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816876543] [2019-11-25 08:52:46,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:52:46,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:46,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:52:46,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:52:46,501 INFO L87 Difference]: Start difference. First operand 388 states and 993 transitions. Second operand 5 states. [2019-11-25 08:52:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:46,637 INFO L93 Difference]: Finished difference Result 563 states and 1392 transitions. [2019-11-25 08:52:46,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:52:46,637 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-25 08:52:46,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:46,640 INFO L225 Difference]: With dead ends: 563 [2019-11-25 08:52:46,641 INFO L226 Difference]: Without dead ends: 354 [2019-11-25 08:52:46,641 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 [2019-11-25 08:52:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2019-11-25 08:52:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2019-11-25 08:52:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2019-11-25 08:52:46,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 883 transitions. [2019-11-25 08:52:46,660 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 883 transitions. Word has length 23 [2019-11-25 08:52:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:46,660 INFO L462 AbstractCegarLoop]: Abstraction has 354 states and 883 transitions. [2019-11-25 08:52:46,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:52:46,660 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 883 transitions. [2019-11-25 08:52:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-25 08:52:46,662 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:46,662 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] [2019-11-25 08:52:46,662 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:46,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:46,663 INFO L82 PathProgramCache]: Analyzing trace with hash 913376083, now seen corresponding path program 1 times [2019-11-25 08:52:46,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:46,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134417461] [2019-11-25 08:52:46,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:46,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:46,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134417461] [2019-11-25 08:52:46,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:46,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-25 08:52:46,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171824260] [2019-11-25 08:52:46,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-25 08:52:46,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:46,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:52:46,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:52:46,787 INFO L87 Difference]: Start difference. First operand 354 states and 883 transitions. Second operand 5 states. [2019-11-25 08:52:46,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:46,832 INFO L93 Difference]: Finished difference Result 431 states and 1037 transitions. [2019-11-25 08:52:46,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:52:46,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-25 08:52:46,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:46,836 INFO L225 Difference]: With dead ends: 431 [2019-11-25 08:52:46,836 INFO L226 Difference]: Without dead ends: 301 [2019-11-25 08:52:46,837 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 [2019-11-25 08:52:46,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-11-25 08:52:46,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 288. [2019-11-25 08:52:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2019-11-25 08:52:46,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 709 transitions. [2019-11-25 08:52:46,853 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 709 transitions. Word has length 23 [2019-11-25 08:52:46,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:46,854 INFO L462 AbstractCegarLoop]: Abstraction has 288 states and 709 transitions. [2019-11-25 08:52:46,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-25 08:52:46,854 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 709 transitions. [2019-11-25 08:52:46,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-25 08:52:46,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:46,857 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] [2019-11-25 08:52:46,857 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:46,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:46,857 INFO L82 PathProgramCache]: Analyzing trace with hash 597396229, now seen corresponding path program 1 times [2019-11-25 08:52:46,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:46,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904917989] [2019-11-25 08:52:46,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:47,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904917989] [2019-11-25 08:52:47,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:47,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-25 08:52:47,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854021754] [2019-11-25 08:52:47,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:52:47,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:47,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:52:47,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:52:47,017 INFO L87 Difference]: Start difference. First operand 288 states and 709 transitions. Second operand 6 states. [2019-11-25 08:52:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:47,196 INFO L93 Difference]: Finished difference Result 546 states and 1323 transitions. [2019-11-25 08:52:47,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:52:47,197 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-25 08:52:47,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:47,200 INFO L225 Difference]: With dead ends: 546 [2019-11-25 08:52:47,200 INFO L226 Difference]: Without dead ends: 336 [2019-11-25 08:52:47,201 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 [2019-11-25 08:52:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2019-11-25 08:52:47,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 301. [2019-11-25 08:52:47,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-11-25 08:52:47,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 735 transitions. [2019-11-25 08:52:47,222 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 735 transitions. Word has length 26 [2019-11-25 08:52:47,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:47,223 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 735 transitions. [2019-11-25 08:52:47,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:52:47,223 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 735 transitions. [2019-11-25 08:52:47,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-25 08:52:47,228 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:47,229 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] [2019-11-25 08:52:47,229 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:47,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1891987234, now seen corresponding path program 1 times [2019-11-25 08:52:47,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:47,230 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205942391] [2019-11-25 08:52:47,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:47,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205942391] [2019-11-25 08:52:47,403 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820899148] [2019-11-25 08:52:47,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:47,494 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:52:47,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:47,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:47,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:47,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:47,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:47,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-25 08:52:47,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607842115] [2019-11-25 08:52:47,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-25 08:52:47,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:47,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:52:47,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:52:47,588 INFO L87 Difference]: Start difference. First operand 301 states and 735 transitions. Second operand 8 states. [2019-11-25 08:52:47,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:47,703 INFO L93 Difference]: Finished difference Result 609 states and 1449 transitions. [2019-11-25 08:52:47,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:52:47,704 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-25 08:52:47,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:47,707 INFO L225 Difference]: With dead ends: 609 [2019-11-25 08:52:47,707 INFO L226 Difference]: Without dead ends: 420 [2019-11-25 08:52:47,708 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 [2019-11-25 08:52:47,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2019-11-25 08:52:47,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 380. [2019-11-25 08:52:47,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2019-11-25 08:52:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 897 transitions. [2019-11-25 08:52:47,720 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 897 transitions. Word has length 30 [2019-11-25 08:52:47,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:47,720 INFO L462 AbstractCegarLoop]: Abstraction has 380 states and 897 transitions. [2019-11-25 08:52:47,720 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-25 08:52:47,721 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 897 transitions. [2019-11-25 08:52:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-25 08:52:47,722 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:47,722 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] [2019-11-25 08:52:47,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:47,927 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:47,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:47,927 INFO L82 PathProgramCache]: Analyzing trace with hash -843030555, now seen corresponding path program 1 times [2019-11-25 08:52:47,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:47,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281874280] [2019-11-25 08:52:47,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:48,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:48,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281874280] [2019-11-25 08:52:48,077 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420526596] [2019-11-25 08:52:48,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:48,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:52:48,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:48,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:48,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:48,179 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:48,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:48,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-25 08:52:48,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145540240] [2019-11-25 08:52:48,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:52:48,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:48,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:52:48,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:52:48,185 INFO L87 Difference]: Start difference. First operand 380 states and 897 transitions. Second operand 9 states. [2019-11-25 08:52:48,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:48,336 INFO L93 Difference]: Finished difference Result 653 states and 1537 transitions. [2019-11-25 08:52:48,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-25 08:52:48,336 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-11-25 08:52:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:48,340 INFO L225 Difference]: With dead ends: 653 [2019-11-25 08:52:48,340 INFO L226 Difference]: Without dead ends: 464 [2019-11-25 08:52:48,340 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 [2019-11-25 08:52:48,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2019-11-25 08:52:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 357. [2019-11-25 08:52:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2019-11-25 08:52:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 847 transitions. [2019-11-25 08:52:48,356 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 847 transitions. Word has length 34 [2019-11-25 08:52:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:48,357 INFO L462 AbstractCegarLoop]: Abstraction has 357 states and 847 transitions. [2019-11-25 08:52:48,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:52:48,358 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 847 transitions. [2019-11-25 08:52:48,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-25 08:52:48,359 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:48,359 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] [2019-11-25 08:52:48,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:48,565 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:48,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:48,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1601775870, now seen corresponding path program 2 times [2019-11-25 08:52:48,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:48,566 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165743625] [2019-11-25 08:52:48,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:48,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165743625] [2019-11-25 08:52:48,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219361551] [2019-11-25 08:52:48,741 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:48,826 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:52:48,826 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:48,827 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:52:48,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:48,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:48,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:48,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:48,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:48,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-25 08:52:48,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995665606] [2019-11-25 08:52:48,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:52:48,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:48,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:52:48,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:52:48,863 INFO L87 Difference]: Start difference. First operand 357 states and 847 transitions. Second operand 10 states. [2019-11-25 08:52:49,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:49,091 INFO L93 Difference]: Finished difference Result 791 states and 1862 transitions. [2019-11-25 08:52:49,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-25 08:52:49,092 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2019-11-25 08:52:49,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:49,095 INFO L225 Difference]: With dead ends: 791 [2019-11-25 08:52:49,095 INFO L226 Difference]: Without dead ends: 448 [2019-11-25 08:52:49,095 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 [2019-11-25 08:52:49,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2019-11-25 08:52:49,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 346. [2019-11-25 08:52:49,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2019-11-25 08:52:49,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 825 transitions. [2019-11-25 08:52:49,106 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 825 transitions. Word has length 38 [2019-11-25 08:52:49,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:49,107 INFO L462 AbstractCegarLoop]: Abstraction has 346 states and 825 transitions. [2019-11-25 08:52:49,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:52:49,107 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 825 transitions. [2019-11-25 08:52:49,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-25 08:52:49,108 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:49,108 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] [2019-11-25 08:52:49,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:49,313 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:49,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:49,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2075284677, now seen corresponding path program 3 times [2019-11-25 08:52:49,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:49,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197953643] [2019-11-25 08:52:49,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:49,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197953643] [2019-11-25 08:52:49,478 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150755680] [2019-11-25 08:52:49,478 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:49,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-25 08:52:49,559 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:49,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-25 08:52:49,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:49,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:49,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:49,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:49,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:49,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:49,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-25 08:52:49,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246823644] [2019-11-25 08:52:49,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-25 08:52:49,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:49,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:52:49,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:52:49,592 INFO L87 Difference]: Start difference. First operand 346 states and 825 transitions. Second operand 11 states. [2019-11-25 08:52:49,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:49,806 INFO L93 Difference]: Finished difference Result 677 states and 1585 transitions. [2019-11-25 08:52:49,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-25 08:52:49,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2019-11-25 08:52:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:49,810 INFO L225 Difference]: With dead ends: 677 [2019-11-25 08:52:49,810 INFO L226 Difference]: Without dead ends: 464 [2019-11-25 08:52:49,810 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 [2019-11-25 08:52:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2019-11-25 08:52:49,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 365. [2019-11-25 08:52:49,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365 states. [2019-11-25 08:52:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 863 transitions. [2019-11-25 08:52:49,821 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 863 transitions. Word has length 42 [2019-11-25 08:52:49,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:49,822 INFO L462 AbstractCegarLoop]: Abstraction has 365 states and 863 transitions. [2019-11-25 08:52:49,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-25 08:52:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 863 transitions. [2019-11-25 08:52:49,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-25 08:52:49,824 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:49,824 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] [2019-11-25 08:52:50,027 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:50,029 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:50,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:50,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1009623326, now seen corresponding path program 4 times [2019-11-25 08:52:50,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:50,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077741947] [2019-11-25 08:52:50,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:50,181 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:50,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077741947] [2019-11-25 08:52:50,182 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803867626] [2019-11-25 08:52:50,182 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:50,259 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:52:50,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:50,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-25 08:52:50,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:50,287 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:50,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:50,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:50,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:50,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-25 08:52:50,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098570914] [2019-11-25 08:52:50,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-25 08:52:50,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:50,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:52:50,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:52:50,300 INFO L87 Difference]: Start difference. First operand 365 states and 863 transitions. Second operand 12 states. [2019-11-25 08:52:50,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:50,515 INFO L93 Difference]: Finished difference Result 709 states and 1649 transitions. [2019-11-25 08:52:50,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-25 08:52:50,516 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2019-11-25 08:52:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:50,520 INFO L225 Difference]: With dead ends: 709 [2019-11-25 08:52:50,520 INFO L226 Difference]: Without dead ends: 496 [2019-11-25 08:52:50,521 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 [2019-11-25 08:52:50,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2019-11-25 08:52:50,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 378. [2019-11-25 08:52:50,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2019-11-25 08:52:50,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 889 transitions. [2019-11-25 08:52:50,536 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 889 transitions. Word has length 46 [2019-11-25 08:52:50,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:50,536 INFO L462 AbstractCegarLoop]: Abstraction has 378 states and 889 transitions. [2019-11-25 08:52:50,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-25 08:52:50,536 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 889 transitions. [2019-11-25 08:52:50,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-25 08:52:50,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:50,537 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] [2019-11-25 08:52:50,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:50,744 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:50,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:50,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1638831707, now seen corresponding path program 5 times [2019-11-25 08:52:50,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:50,745 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583932047] [2019-11-25 08:52:50,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:50,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583932047] [2019-11-25 08:52:50,882 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392698770] [2019-11-25 08:52:50,882 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:50,948 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-25 08:52:50,948 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:50,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-25 08:52:50,956 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:50,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:50,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:50,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:50,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:50,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-25 08:52:50,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384554274] [2019-11-25 08:52:50,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-25 08:52:50,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:50,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-25 08:52:50,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-25 08:52:50,992 INFO L87 Difference]: Start difference. First operand 378 states and 889 transitions. Second operand 13 states. [2019-11-25 08:52:51,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:51,267 INFO L93 Difference]: Finished difference Result 757 states and 1745 transitions. [2019-11-25 08:52:51,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-25 08:52:51,267 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2019-11-25 08:52:51,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:51,271 INFO L225 Difference]: With dead ends: 757 [2019-11-25 08:52:51,271 INFO L226 Difference]: Without dead ends: 568 [2019-11-25 08:52:51,272 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 [2019-11-25 08:52:51,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-11-25 08:52:51,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 540. [2019-11-25 08:52:51,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2019-11-25 08:52:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1217 transitions. [2019-11-25 08:52:51,287 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1217 transitions. Word has length 50 [2019-11-25 08:52:51,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:51,287 INFO L462 AbstractCegarLoop]: Abstraction has 540 states and 1217 transitions. [2019-11-25 08:52:51,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-25 08:52:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1217 transitions. [2019-11-25 08:52:51,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-25 08:52:51,288 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:51,289 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] [2019-11-25 08:52:51,491 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:51,492 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:51,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:51,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1049102018, now seen corresponding path program 6 times [2019-11-25 08:52:51,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:51,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85267816] [2019-11-25 08:52:51,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:51,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:51,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85267816] [2019-11-25 08:52:51,675 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227153577] [2019-11-25 08:52:51,675 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:51,751 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-25 08:52:51,751 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:51,753 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:52:51,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:51,781 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:51,781 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:51,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:51,789 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:51,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:51,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-25 08:52:51,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927569068] [2019-11-25 08:52:51,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-25 08:52:51,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:51,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-25 08:52:51,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-25 08:52:51,791 INFO L87 Difference]: Start difference. First operand 540 states and 1217 transitions. Second operand 14 states. [2019-11-25 08:52:52,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:52,093 INFO L93 Difference]: Finished difference Result 797 states and 1825 transitions. [2019-11-25 08:52:52,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-25 08:52:52,094 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-11-25 08:52:52,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:52,098 INFO L225 Difference]: With dead ends: 797 [2019-11-25 08:52:52,098 INFO L226 Difference]: Without dead ends: 608 [2019-11-25 08:52:52,098 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=435, Unknown=0, NotChecked=0, Total=600 [2019-11-25 08:52:52,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2019-11-25 08:52:52,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 434. [2019-11-25 08:52:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2019-11-25 08:52:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1001 transitions. [2019-11-25 08:52:52,112 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1001 transitions. Word has length 54 [2019-11-25 08:52:52,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:52,112 INFO L462 AbstractCegarLoop]: Abstraction has 434 states and 1001 transitions. [2019-11-25 08:52:52,112 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-25 08:52:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1001 transitions. [2019-11-25 08:52:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-25 08:52:52,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:52,114 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] [2019-11-25 08:52:52,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:52,318 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:52,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:52,318 INFO L82 PathProgramCache]: Analyzing trace with hash -964845947, now seen corresponding path program 7 times [2019-11-25 08:52:52,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:52,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448881952] [2019-11-25 08:52:52,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:52,457 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448881952] [2019-11-25 08:52:52,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921439281] [2019-11-25 08:52:52,458 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:52,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:52:52,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:52,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:52,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:52,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:52,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:52,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-25 08:52:52,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366457898] [2019-11-25 08:52:52,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-25 08:52:52,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:52,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-25 08:52:52,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-25 08:52:52,563 INFO L87 Difference]: Start difference. First operand 434 states and 1001 transitions. Second operand 15 states. [2019-11-25 08:52:52,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:52,924 INFO L93 Difference]: Finished difference Result 951 states and 2182 transitions. [2019-11-25 08:52:52,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-25 08:52:52,924 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-11-25 08:52:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:52,929 INFO L225 Difference]: With dead ends: 951 [2019-11-25 08:52:52,929 INFO L226 Difference]: Without dead ends: 632 [2019-11-25 08:52:52,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2019-11-25 08:52:52,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2019-11-25 08:52:52,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 604. [2019-11-25 08:52:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2019-11-25 08:52:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 1345 transitions. [2019-11-25 08:52:52,946 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 1345 transitions. Word has length 58 [2019-11-25 08:52:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:52,947 INFO L462 AbstractCegarLoop]: Abstraction has 604 states and 1345 transitions. [2019-11-25 08:52:52,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-25 08:52:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 1345 transitions. [2019-11-25 08:52:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-25 08:52:52,948 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:52,948 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] [2019-11-25 08:52:53,160 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:53,160 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:53,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:53,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1803039070, now seen corresponding path program 8 times [2019-11-25 08:52:53,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:53,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315788585] [2019-11-25 08:52:53,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:53,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315788585] [2019-11-25 08:52:53,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062645194] [2019-11-25 08:52:53,328 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:53,398 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:52:53,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:53,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-25 08:52:53,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:53,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:53,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:53,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:53,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:53,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-25 08:52:53,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400937640] [2019-11-25 08:52:53,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-25 08:52:53,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:53,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-25 08:52:53,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-11-25 08:52:53,430 INFO L87 Difference]: Start difference. First operand 604 states and 1345 transitions. Second operand 16 states. [2019-11-25 08:52:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:53,778 INFO L93 Difference]: Finished difference Result 987 states and 2254 transitions. [2019-11-25 08:52:53,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-25 08:52:53,778 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2019-11-25 08:52:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:53,782 INFO L225 Difference]: With dead ends: 987 [2019-11-25 08:52:53,782 INFO L226 Difference]: Without dead ends: 692 [2019-11-25 08:52:53,783 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=640, Unknown=0, NotChecked=0, Total=870 [2019-11-25 08:52:53,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2019-11-25 08:52:53,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 636. [2019-11-25 08:52:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2019-11-25 08:52:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1409 transitions. [2019-11-25 08:52:53,799 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1409 transitions. Word has length 62 [2019-11-25 08:52:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:53,800 INFO L462 AbstractCegarLoop]: Abstraction has 636 states and 1409 transitions. [2019-11-25 08:52:53,800 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-25 08:52:53,800 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1409 transitions. [2019-11-25 08:52:53,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-25 08:52:53,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:53,801 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] [2019-11-25 08:52:54,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:54,021 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:54,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:54,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1525222555, now seen corresponding path program 9 times [2019-11-25 08:52:54,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:54,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507169365] [2019-11-25 08:52:54,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:54,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507169365] [2019-11-25 08:52:54,206 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081803699] [2019-11-25 08:52:54,206 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:54,284 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-25 08:52:54,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:54,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-25 08:52:54,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:54,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:54,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:54,312 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:54,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:54,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-25 08:52:54,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985355900] [2019-11-25 08:52:54,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-25 08:52:54,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:54,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-25 08:52:54,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-25 08:52:54,319 INFO L87 Difference]: Start difference. First operand 636 states and 1409 transitions. Second operand 17 states. [2019-11-25 08:52:54,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:54,610 INFO L93 Difference]: Finished difference Result 893 states and 2017 transitions. [2019-11-25 08:52:54,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-25 08:52:54,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2019-11-25 08:52:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:54,614 INFO L225 Difference]: With dead ends: 893 [2019-11-25 08:52:54,614 INFO L226 Difference]: Without dead ends: 680 [2019-11-25 08:52:54,615 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=655, Unknown=0, NotChecked=0, Total=930 [2019-11-25 08:52:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2019-11-25 08:52:54,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 668. [2019-11-25 08:52:54,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2019-11-25 08:52:54,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1473 transitions. [2019-11-25 08:52:54,632 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1473 transitions. Word has length 66 [2019-11-25 08:52:54,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:54,632 INFO L462 AbstractCegarLoop]: Abstraction has 668 states and 1473 transitions. [2019-11-25 08:52:54,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-25 08:52:54,633 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1473 transitions. [2019-11-25 08:52:54,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-25 08:52:54,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:54,634 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] [2019-11-25 08:52:54,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:54,839 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:54,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:54,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1773254274, now seen corresponding path program 10 times [2019-11-25 08:52:54,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:54,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369322337] [2019-11-25 08:52:54,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:55,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369322337] [2019-11-25 08:52:55,031 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604718009] [2019-11-25 08:52:55,031 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:55,101 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:52:55,102 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:55,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-25 08:52:55,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:55,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:55,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:55,137 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:55,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:55,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-25 08:52:55,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528755049] [2019-11-25 08:52:55,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-25 08:52:55,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:55,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-25 08:52:55,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-11-25 08:52:55,150 INFO L87 Difference]: Start difference. First operand 668 states and 1473 transitions. Second operand 18 states. [2019-11-25 08:52:55,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:55,524 INFO L93 Difference]: Finished difference Result 1051 states and 2382 transitions. [2019-11-25 08:52:55,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-25 08:52:55,525 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2019-11-25 08:52:55,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:55,528 INFO L225 Difference]: With dead ends: 1051 [2019-11-25 08:52:55,528 INFO L226 Difference]: Without dead ends: 756 [2019-11-25 08:52:55,529 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 [2019-11-25 08:52:55,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-11-25 08:52:55,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 700. [2019-11-25 08:52:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2019-11-25 08:52:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 1537 transitions. [2019-11-25 08:52:55,546 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 1537 transitions. Word has length 70 [2019-11-25 08:52:55,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:55,546 INFO L462 AbstractCegarLoop]: Abstraction has 700 states and 1537 transitions. [2019-11-25 08:52:55,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-25 08:52:55,547 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 1537 transitions. [2019-11-25 08:52:55,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-25 08:52:55,548 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:55,548 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] [2019-11-25 08:52:55,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:55,757 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:55,757 INFO L82 PathProgramCache]: Analyzing trace with hash 184379461, now seen corresponding path program 11 times [2019-11-25 08:52:55,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:55,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238020750] [2019-11-25 08:52:55,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:55,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:55,955 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:55,955 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238020750] [2019-11-25 08:52:55,956 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051360917] [2019-11-25 08:52:55,956 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:56,013 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-25 08:52:56,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:56,014 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-25 08:52:56,015 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:56,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:56,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:56,049 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:56,056 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:56,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:56,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-25 08:52:56,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085671577] [2019-11-25 08:52:56,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-25 08:52:56,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:56,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-25 08:52:56,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-11-25 08:52:56,058 INFO L87 Difference]: Start difference. First operand 700 states and 1537 transitions. Second operand 19 states. [2019-11-25 08:52:56,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:56,417 INFO L93 Difference]: Finished difference Result 973 states and 2177 transitions. [2019-11-25 08:52:56,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-25 08:52:56,417 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 74 [2019-11-25 08:52:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:56,422 INFO L225 Difference]: With dead ends: 973 [2019-11-25 08:52:56,422 INFO L226 Difference]: Without dead ends: 784 [2019-11-25 08:52:56,422 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 [2019-11-25 08:52:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2019-11-25 08:52:56,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 517. [2019-11-25 08:52:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2019-11-25 08:52:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1167 transitions. [2019-11-25 08:52:56,435 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1167 transitions. Word has length 74 [2019-11-25 08:52:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:56,436 INFO L462 AbstractCegarLoop]: Abstraction has 517 states and 1167 transitions. [2019-11-25 08:52:56,436 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-25 08:52:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1167 transitions. [2019-11-25 08:52:56,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-25 08:52:56,437 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:56,437 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] [2019-11-25 08:52:56,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:56,640 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:56,640 INFO L82 PathProgramCache]: Analyzing trace with hash -2115649950, now seen corresponding path program 12 times [2019-11-25 08:52:56,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:56,641 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893279368] [2019-11-25 08:52:56,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:56,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893279368] [2019-11-25 08:52:56,843 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92314886] [2019-11-25 08:52:56,843 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:56,907 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-25 08:52:56,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:56,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-25 08:52:56,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:56,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:56,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:56,941 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:56,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:56,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-25 08:52:56,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880342018] [2019-11-25 08:52:56,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-25 08:52:56,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:56,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-25 08:52:56,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-11-25 08:52:56,951 INFO L87 Difference]: Start difference. First operand 517 states and 1167 transitions. Second operand 20 states. [2019-11-25 08:52:57,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:57,390 INFO L93 Difference]: Finished difference Result 1111 states and 2502 transitions. [2019-11-25 08:52:57,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-25 08:52:57,391 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2019-11-25 08:52:57,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:57,395 INFO L225 Difference]: With dead ends: 1111 [2019-11-25 08:52:57,396 INFO L226 Difference]: Without dead ends: 816 [2019-11-25 08:52:57,397 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 [2019-11-25 08:52:57,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2019-11-25 08:52:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 530. [2019-11-25 08:52:57,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 530 states. [2019-11-25 08:52:57,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1193 transitions. [2019-11-25 08:52:57,410 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1193 transitions. Word has length 78 [2019-11-25 08:52:57,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:57,411 INFO L462 AbstractCegarLoop]: Abstraction has 530 states and 1193 transitions. [2019-11-25 08:52:57,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-25 08:52:57,411 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1193 transitions. [2019-11-25 08:52:57,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-25 08:52:57,412 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:57,412 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] [2019-11-25 08:52:57,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:57,616 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:57,616 INFO L82 PathProgramCache]: Analyzing trace with hash -384762587, now seen corresponding path program 13 times [2019-11-25 08:52:57,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:57,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685220377] [2019-11-25 08:52:57,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:57,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685220377] [2019-11-25 08:52:57,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915468759] [2019-11-25 08:52:57,879 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:57,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-25 08:52:57,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:57,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:57,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:57,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:57,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:57,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-25 08:52:57,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922845362] [2019-11-25 08:52:57,985 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-25 08:52:57,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:57,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-25 08:52:57,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2019-11-25 08:52:57,986 INFO L87 Difference]: Start difference. First operand 530 states and 1193 transitions. Second operand 21 states. [2019-11-25 08:52:58,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:58,459 INFO L93 Difference]: Finished difference Result 1143 states and 2566 transitions. [2019-11-25 08:52:58,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-25 08:52:58,459 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2019-11-25 08:52:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:58,463 INFO L225 Difference]: With dead ends: 1143 [2019-11-25 08:52:58,463 INFO L226 Difference]: Without dead ends: 824 [2019-11-25 08:52:58,463 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 [2019-11-25 08:52:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2019-11-25 08:52:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 796. [2019-11-25 08:52:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 796 states. [2019-11-25 08:52:58,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 1729 transitions. [2019-11-25 08:52:58,479 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 1729 transitions. Word has length 82 [2019-11-25 08:52:58,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:58,479 INFO L462 AbstractCegarLoop]: Abstraction has 796 states and 1729 transitions. [2019-11-25 08:52:58,479 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-25 08:52:58,479 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 1729 transitions. [2019-11-25 08:52:58,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-25 08:52:58,481 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:58,481 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] [2019-11-25 08:52:58,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:58,685 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:58,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:58,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1056709054, now seen corresponding path program 14 times [2019-11-25 08:52:58,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:58,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75069851] [2019-11-25 08:52:58,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:58,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75069851] [2019-11-25 08:52:58,978 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623092482] [2019-11-25 08:52:58,978 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:52:59,041 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:52:59,041 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:59,042 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-25 08:52:59,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:59,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:59,077 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:59,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:59,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:59,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-25 08:52:59,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391341930] [2019-11-25 08:52:59,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-25 08:52:59,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:59,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-25 08:52:59,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-11-25 08:52:59,085 INFO L87 Difference]: Start difference. First operand 796 states and 1729 transitions. Second operand 22 states. [2019-11-25 08:52:59,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:59,514 INFO L93 Difference]: Finished difference Result 1179 states and 2638 transitions. [2019-11-25 08:52:59,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-25 08:52:59,514 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2019-11-25 08:52:59,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:52:59,518 INFO L225 Difference]: With dead ends: 1179 [2019-11-25 08:52:59,518 INFO L226 Difference]: Without dead ends: 884 [2019-11-25 08:52:59,519 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 [2019-11-25 08:52:59,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2019-11-25 08:52:59,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 828. [2019-11-25 08:52:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-11-25 08:52:59,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1793 transitions. [2019-11-25 08:52:59,534 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1793 transitions. Word has length 86 [2019-11-25 08:52:59,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:52:59,535 INFO L462 AbstractCegarLoop]: Abstraction has 828 states and 1793 transitions. [2019-11-25 08:52:59,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-25 08:52:59,535 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1793 transitions. [2019-11-25 08:52:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-25 08:52:59,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:52:59,537 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] [2019-11-25 08:52:59,739 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:59,740 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:52:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:59,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1345434117, now seen corresponding path program 15 times [2019-11-25 08:52:59,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:59,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675432834] [2019-11-25 08:52:59,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:00,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675432834] [2019-11-25 08:53:00,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415219680] [2019-11-25 08:53:00,055 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:53:00,143 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-25 08:53:00,144 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:00,145 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-25 08:53:00,146 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:00,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:53:00,174 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:53:00,175 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:53:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:00,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:00,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-25 08:53:00,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127405443] [2019-11-25 08:53:00,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-25 08:53:00,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:00,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-25 08:53:00,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2019-11-25 08:53:00,190 INFO L87 Difference]: Start difference. First operand 828 states and 1793 transitions. Second operand 23 states. [2019-11-25 08:53:00,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:00,629 INFO L93 Difference]: Finished difference Result 1085 states and 2401 transitions. [2019-11-25 08:53:00,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-25 08:53:00,630 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2019-11-25 08:53:00,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:00,634 INFO L225 Difference]: With dead ends: 1085 [2019-11-25 08:53:00,634 INFO L226 Difference]: Without dead ends: 872 [2019-11-25 08:53:00,634 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2019-11-25 08:53:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2019-11-25 08:53:00,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 860. [2019-11-25 08:53:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 860 states. [2019-11-25 08:53:00,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 1857 transitions. [2019-11-25 08:53:00,651 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 1857 transitions. Word has length 90 [2019-11-25 08:53:00,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:00,651 INFO L462 AbstractCegarLoop]: Abstraction has 860 states and 1857 transitions. [2019-11-25 08:53:00,651 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-25 08:53:00,652 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 1857 transitions. [2019-11-25 08:53:00,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-25 08:53:00,653 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:00,654 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] [2019-11-25 08:53:00,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:00,857 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:00,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:00,857 INFO L82 PathProgramCache]: Analyzing trace with hash 720121378, now seen corresponding path program 16 times [2019-11-25 08:53:00,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:00,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015381129] [2019-11-25 08:53:00,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:01,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015381129] [2019-11-25 08:53:01,115 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847451456] [2019-11-25 08:53:01,115 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:53:01,205 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:53:01,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:01,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-25 08:53:01,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:01,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:53:01,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:53:01,237 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:53:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:01,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:01,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-25 08:53:01,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506028656] [2019-11-25 08:53:01,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-25 08:53:01,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:01,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-25 08:53:01,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-11-25 08:53:01,246 INFO L87 Difference]: Start difference. First operand 860 states and 1857 transitions. Second operand 24 states. [2019-11-25 08:53:01,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:01,727 INFO L93 Difference]: Finished difference Result 1117 states and 2465 transitions. [2019-11-25 08:53:01,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-25 08:53:01,728 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 94 [2019-11-25 08:53:01,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:01,732 INFO L225 Difference]: With dead ends: 1117 [2019-11-25 08:53:01,732 INFO L226 Difference]: Without dead ends: 880 [2019-11-25 08:53:01,733 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=557, Invalid=1335, Unknown=0, NotChecked=0, Total=1892 [2019-11-25 08:53:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-11-25 08:53:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 864. [2019-11-25 08:53:01,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2019-11-25 08:53:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1861 transitions. [2019-11-25 08:53:01,748 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1861 transitions. Word has length 94 [2019-11-25 08:53:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:01,749 INFO L462 AbstractCegarLoop]: Abstraction has 864 states and 1861 transitions. [2019-11-25 08:53:01,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-25 08:53:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1861 transitions. [2019-11-25 08:53:01,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-25 08:53:01,751 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:01,752 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] [2019-11-25 08:53:01,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:01,954 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:01,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:01,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1899988709, now seen corresponding path program 17 times [2019-11-25 08:53:01,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:01,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562885296] [2019-11-25 08:53:01,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:53:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:02,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562885296] [2019-11-25 08:53:02,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744936650] [2019-11-25 08:53:02,327 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/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 [2019-11-25 08:53:02,417 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-25 08:53:02,418 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:53:02,419 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-25 08:53:02,421 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:53:02,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:53:02,456 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:53:02,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:53:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:53:02,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:53:02,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-25 08:53:02,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001260840] [2019-11-25 08:53:02,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-25 08:53:02,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:53:02,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-25 08:53:02,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2019-11-25 08:53:02,470 INFO L87 Difference]: Start difference. First operand 864 states and 1861 transitions. Second operand 25 states. [2019-11-25 08:53:02,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:53:02,956 INFO L93 Difference]: Finished difference Result 1125 states and 2481 transitions. [2019-11-25 08:53:02,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-25 08:53:02,957 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 98 [2019-11-25 08:53:02,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:53:02,962 INFO L225 Difference]: With dead ends: 1125 [2019-11-25 08:53:02,962 INFO L226 Difference]: Without dead ends: 936 [2019-11-25 08:53:02,963 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=647, Invalid=1515, Unknown=0, NotChecked=0, Total=2162 [2019-11-25 08:53:02,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2019-11-25 08:53:02,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 908. [2019-11-25 08:53:02,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2019-11-25 08:53:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1953 transitions. [2019-11-25 08:53:02,979 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1953 transitions. Word has length 98 [2019-11-25 08:53:02,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:53:02,980 INFO L462 AbstractCegarLoop]: Abstraction has 908 states and 1953 transitions. [2019-11-25 08:53:02,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-25 08:53:02,980 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1953 transitions. [2019-11-25 08:53:02,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-25 08:53:02,982 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:53:02,982 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] [2019-11-25 08:53:03,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:53:03,185 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-25 08:53:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:53:03,185 INFO L82 PathProgramCache]: Analyzing trace with hash -706280987, now seen corresponding path program 18 times [2019-11-25 08:53:03,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:53:03,186 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377995996] [2019-11-25 08:53:03,186 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:53:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:53:03,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:53:03,252 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:53:03,252 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-25 08:53:03,343 INFO L304 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2019-11-25 08:53:03,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:53:03 BasicIcfg [2019-11-25 08:53:03,345 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-25 08:53:03,345 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:53:03,345 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:53:03,345 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:53:03,346 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:52:45" (3/4) ... [2019-11-25 08:53:03,348 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-25 08:53:03,433 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_827720f9-9304-46d8-a7c4-78159d2151f9/bin/uautomizer/witness.graphml [2019-11-25 08:53:03,433 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:53:03,435 INFO L168 Benchmark]: Toolchain (without parser) took 19211.83 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 408.9 MB). Free memory was 947.5 MB in the beginning and 966.2 MB in the end (delta: -18.8 MB). Peak memory consumption was 390.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:03,435 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:53:03,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 665.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 171.4 MB). Free memory was 947.5 MB in the beginning and 1.1 GB in the end (delta: -192.3 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:03,436 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:53:03,436 INFO L168 Benchmark]: Boogie Preprocessor took 27.27 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:53:03,437 INFO L168 Benchmark]: RCFGBuilder took 481.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:03,437 INFO L168 Benchmark]: TraceAbstraction took 17904.39 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 237.5 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 108.5 MB). Peak memory consumption was 346.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:03,437 INFO L168 Benchmark]: Witness Printer took 87.93 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 966.2 MB in the end (delta: 36.3 MB). Peak memory consumption was 36.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:53:03,439 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 665.64 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 171.4 MB). Free memory was 947.5 MB in the beginning and 1.1 GB in the end (delta: -192.3 MB). Peak memory consumption was 19.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 40.56 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 27.27 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 481.94 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 28.7 MB). Peak memory consumption was 28.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 17904.39 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 237.5 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 108.5 MB). Peak memory consumption was 346.0 MB. Max. memory is 11.5 GB. * Witness Printer took 87.93 ms. Allocated memory is still 1.4 GB. Free memory was 1.0 GB in the beginning and 966.2 MB in the end (delta: 36.3 MB). Peak memory consumption was 36.3 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=0, k=1] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=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=2, k=1] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=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=3, k=4] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=3] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=3] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=4] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=4, k=6] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, 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=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=6, k=5] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=5, k=7] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, 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=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=8, k=6] [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=8, 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=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: 17.7s, OverallIterations: 23, TraceHistogramMax: 10, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1296 SDtfs, 5722 SDslu, 9671 SDs, 0 SdLazy, 1908 SolverSat, 826 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1691 GetRequests, 1160 SyntacticMatches, 0 SemanticMatches, 531 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3051 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1013occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 22 MinimizatonAttempts, 1673 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...