./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/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 e24917ef8695200a643e71e238ee3c2cc9fb2120 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 04:46:13,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 04:46:13,862 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 04:46:13,879 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 04:46:13,879 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 04:46:13,880 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 04:46:13,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 04:46:13,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 04:46:13,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 04:46:13,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 04:46:13,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 04:46:13,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 04:46:13,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 04:46:13,906 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 04:46:13,907 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 04:46:13,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 04:46:13,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 04:46:13,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 04:46:13,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 04:46:13,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 04:46:13,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 04:46:13,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 04:46:13,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 04:46:13,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 04:46:13,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 04:46:13,928 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 04:46:13,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 04:46:13,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 04:46:13,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 04:46:13,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 04:46:13,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 04:46:13,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 04:46:13,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 04:46:13,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 04:46:13,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 04:46:13,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 04:46:13,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 04:46:13,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 04:46:13,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 04:46:13,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 04:46:13,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 04:46:13,940 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 04:46:13,975 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 04:46:13,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 04:46:13,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 04:46:13,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 04:46:13,977 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 04:46:13,977 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 04:46:13,978 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 04:46:13,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 04:46:13,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 04:46:13,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 04:46:13,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 04:46:13,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 04:46:13,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 04:46:13,980 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 04:46:13,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 04:46:13,980 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 04:46:13,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 04:46:13,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 04:46:13,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 04:46:13,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 04:46:13,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 04:46:13,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:46:13,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 04:46:13,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 04:46:13,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 04:46:13,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 04:46:13,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 04:46:13,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 04:46:13,983 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_f00a119e-9d93-4982-9db2-fc04fd92cded/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 -> e24917ef8695200a643e71e238ee3c2cc9fb2120 [2019-11-20 04:46:14,162 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 04:46:14,180 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 04:46:14,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 04:46:14,184 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 04:46:14,185 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 04:46:14,186 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longer-1.i [2019-11-20 04:46:14,250 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/data/43bf2010e/522a973ef8c14f9081040626e01e9612/FLAG833178ae9 [2019-11-20 04:46:14,778 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 04:46:14,779 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/sv-benchmarks/c/pthread/triangular-longer-1.i [2019-11-20 04:46:14,790 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/data/43bf2010e/522a973ef8c14f9081040626e01e9612/FLAG833178ae9 [2019-11-20 04:46:15,099 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/data/43bf2010e/522a973ef8c14f9081040626e01e9612 [2019-11-20 04:46:15,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 04:46:15,103 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 04:46:15,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 04:46:15,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 04:46:15,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 04:46:15,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:46:15" (1/1) ... [2019-11-20 04:46:15,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48db4d69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:46:15, skipping insertion in model container [2019-11-20 04:46:15,113 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:46:15" (1/1) ... [2019-11-20 04:46:15,122 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 04:46:15,165 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 04:46:15,560 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:46:15,569 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 04:46:15,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:46:15,678 INFO L192 MainTranslator]: Completed translation [2019-11-20 04:46:15,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:46:15 WrapperNode [2019-11-20 04:46:15,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 04:46:15,680 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 04:46:15,680 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 04:46:15,680 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 04:46:15,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:46:15" (1/1) ... [2019-11-20 04:46:15,703 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:46:15" (1/1) ... [2019-11-20 04:46:15,722 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 04:46:15,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 04:46:15,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 04:46:15,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 04:46:15,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:46:15" (1/1) ... [2019-11-20 04:46:15,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:46:15" (1/1) ... [2019-11-20 04:46:15,734 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:46:15" (1/1) ... [2019-11-20 04:46:15,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:46:15" (1/1) ... [2019-11-20 04:46:15,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:46:15" (1/1) ... [2019-11-20 04:46:15,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:46:15" (1/1) ... [2019-11-20 04:46:15,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:46:15" (1/1) ... [2019-11-20 04:46:15,748 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 04:46:15,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 04:46:15,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 04:46:15,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 04:46:15,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:46:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:46:15,820 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-11-20 04:46:15,820 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-11-20 04:46:15,820 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-11-20 04:46:15,820 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-11-20 04:46:15,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-20 04:46:15,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-11-20 04:46:15,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 04:46:15,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 04:46:15,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-11-20 04:46:15,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 04:46:15,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 04:46:15,826 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-11-20 04:46:16,209 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 04:46:16,209 INFO L285 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-20 04:46:16,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:46:16 BoogieIcfgContainer [2019-11-20 04:46:16,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 04:46:16,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 04:46:16,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 04:46:16,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 04:46:16,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 04:46:15" (1/3) ... [2019-11-20 04:46:16,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca68634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:46:16, skipping insertion in model container [2019-11-20 04:46:16,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:46:15" (2/3) ... [2019-11-20 04:46:16,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca68634 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:46:16, skipping insertion in model container [2019-11-20 04:46:16,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:46:16" (3/3) ... [2019-11-20 04:46:16,219 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2019-11-20 04:46:16,288 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,288 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,289 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,289 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,289 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,291 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,291 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,291 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,291 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,292 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,292 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,292 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,293 WARN L315 ript$VariableManager]: TermVariabe t1Thread1of3ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,293 WARN L315 ript$VariableManager]: TermVariabe |t1Thread1of3ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,293 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,293 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,293 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,294 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,294 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,294 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,295 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,295 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,296 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,296 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,297 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,297 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,297 WARN L315 ript$VariableManager]: TermVariabe t1Thread2of3ForFork3_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,298 WARN L315 ript$VariableManager]: TermVariabe |t1Thread2of3ForFork3_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,298 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,298 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,298 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,299 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,299 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,299 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,299 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,300 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,300 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,300 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,300 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,301 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,301 WARN L315 ript$VariableManager]: TermVariabe t1Thread3of3ForFork5_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,302 WARN L315 ript$VariableManager]: TermVariabe |t1Thread3of3ForFork5_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,303 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,303 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,303 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,303 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,304 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,304 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,305 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,305 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,305 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,305 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,306 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,306 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,306 WARN L315 ript$VariableManager]: TermVariabe t2Thread2of3ForFork2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,307 WARN L315 ript$VariableManager]: TermVariabe |t2Thread2of3ForFork2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,307 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,307 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,308 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,308 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,308 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,309 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,309 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,309 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,309 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,310 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,310 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,310 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,310 WARN L315 ript$VariableManager]: TermVariabe t2Thread3of3ForFork4_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,310 WARN L315 ript$VariableManager]: TermVariabe |t2Thread3of3ForFork4_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,311 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,311 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,312 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,312 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,312 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,312 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,313 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,313 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,313 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,314 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,314 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,314 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,315 WARN L315 ript$VariableManager]: TermVariabe t2Thread1of3ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,317 WARN L315 ript$VariableManager]: TermVariabe |t2Thread1of3ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-11-20 04:46:16,339 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-11-20 04:46:16,339 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 04:46:16,347 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 04:46:16,362 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 04:46:16,381 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 04:46:16,381 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 04:46:16,382 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 04:46:16,382 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 04:46:16,383 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 04:46:16,383 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 04:46:16,383 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 04:46:16,383 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 04:46:16,399 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 95 places, 93 transitions [2019-11-20 04:46:17,187 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 8843 states. [2019-11-20 04:46:17,189 INFO L276 IsEmpty]: Start isEmpty. Operand 8843 states. [2019-11-20 04:46:17,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 04:46:17,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:17,211 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:17,211 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:17,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:17,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1140660711, now seen corresponding path program 1 times [2019-11-20 04:46:17,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:17,227 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422834541] [2019-11-20 04:46:17,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:17,579 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422834541] [2019-11-20 04:46:17,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:46:17,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 04:46:17,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615660805] [2019-11-20 04:46:17,588 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 04:46:17,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:17,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 04:46:17,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:46:17,604 INFO L87 Difference]: Start difference. First operand 8843 states. Second operand 5 states. [2019-11-20 04:46:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:18,034 INFO L93 Difference]: Finished difference Result 15656 states and 45634 transitions. [2019-11-20 04:46:18,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 04:46:18,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-20 04:46:18,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:18,097 INFO L225 Difference]: With dead ends: 15656 [2019-11-20 04:46:18,097 INFO L226 Difference]: Without dead ends: 4154 [2019-11-20 04:46:18,099 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 04:46:18,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2019-11-20 04:46:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3146. [2019-11-20 04:46:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3146 states. [2019-11-20 04:46:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3146 states to 3146 states and 8437 transitions. [2019-11-20 04:46:18,427 INFO L78 Accepts]: Start accepts. Automaton has 3146 states and 8437 transitions. Word has length 20 [2019-11-20 04:46:18,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:18,428 INFO L462 AbstractCegarLoop]: Abstraction has 3146 states and 8437 transitions. [2019-11-20 04:46:18,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 04:46:18,429 INFO L276 IsEmpty]: Start isEmpty. Operand 3146 states and 8437 transitions. [2019-11-20 04:46:18,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 04:46:18,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:18,436 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:18,437 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:18,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:18,438 INFO L82 PathProgramCache]: Analyzing trace with hash 913376083, now seen corresponding path program 1 times [2019-11-20 04:46:18,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:18,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029723179] [2019-11-20 04:46:18,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:18,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029723179] [2019-11-20 04:46:18,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:46:18,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 04:46:18,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831428662] [2019-11-20 04:46:18,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 04:46:18,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:18,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 04:46:18,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:46:18,611 INFO L87 Difference]: Start difference. First operand 3146 states and 8437 transitions. Second operand 5 states. [2019-11-20 04:46:18,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:18,798 INFO L93 Difference]: Finished difference Result 3839 states and 9823 transitions. [2019-11-20 04:46:18,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 04:46:18,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-20 04:46:18,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:18,818 INFO L225 Difference]: With dead ends: 3839 [2019-11-20 04:46:18,818 INFO L226 Difference]: Without dead ends: 2723 [2019-11-20 04:46:18,820 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-20 04:46:18,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2019-11-20 04:46:18,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 2615. [2019-11-20 04:46:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2615 states. [2019-11-20 04:46:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 6979 transitions. [2019-11-20 04:46:18,920 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 6979 transitions. Word has length 23 [2019-11-20 04:46:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:18,920 INFO L462 AbstractCegarLoop]: Abstraction has 2615 states and 6979 transitions. [2019-11-20 04:46:18,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 04:46:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 6979 transitions. [2019-11-20 04:46:18,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 04:46:18,922 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:18,922 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:18,923 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:18,923 INFO L82 PathProgramCache]: Analyzing trace with hash 617551453, now seen corresponding path program 1 times [2019-11-20 04:46:18,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:18,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291435239] [2019-11-20 04:46:18,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:19,062 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291435239] [2019-11-20 04:46:19,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:46:19,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 04:46:19,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806343163] [2019-11-20 04:46:19,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 04:46:19,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:19,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 04:46:19,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 04:46:19,064 INFO L87 Difference]: Start difference. First operand 2615 states and 6979 transitions. Second operand 5 states. [2019-11-20 04:46:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:19,270 INFO L93 Difference]: Finished difference Result 4298 states and 10786 transitions. [2019-11-20 04:46:19,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 04:46:19,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-11-20 04:46:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:19,288 INFO L225 Difference]: With dead ends: 4298 [2019-11-20 04:46:19,288 INFO L226 Difference]: Without dead ends: 2471 [2019-11-20 04:46:19,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-20 04:46:19,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-11-20 04:46:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2372. [2019-11-20 04:46:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2372 states. [2019-11-20 04:46:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2372 states to 2372 states and 6091 transitions. [2019-11-20 04:46:19,371 INFO L78 Accepts]: Start accepts. Automaton has 2372 states and 6091 transitions. Word has length 23 [2019-11-20 04:46:19,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:19,372 INFO L462 AbstractCegarLoop]: Abstraction has 2372 states and 6091 transitions. [2019-11-20 04:46:19,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 04:46:19,372 INFO L276 IsEmpty]: Start isEmpty. Operand 2372 states and 6091 transitions. [2019-11-20 04:46:19,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 04:46:19,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:19,374 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:19,375 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:19,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1550342799, now seen corresponding path program 1 times [2019-11-20 04:46:19,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:19,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319804374] [2019-11-20 04:46:19,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:19,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319804374] [2019-11-20 04:46:19,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:46:19,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-20 04:46:19,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839312923] [2019-11-20 04:46:19,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 04:46:19,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:19,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 04:46:19,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:46:19,533 INFO L87 Difference]: Start difference. First operand 2372 states and 6091 transitions. Second operand 6 states. [2019-11-20 04:46:19,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:19,803 INFO L93 Difference]: Finished difference Result 3794 states and 9382 transitions. [2019-11-20 04:46:19,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 04:46:19,804 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-20 04:46:19,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:19,822 INFO L225 Difference]: With dead ends: 3794 [2019-11-20 04:46:19,822 INFO L226 Difference]: Without dead ends: 2642 [2019-11-20 04:46:19,823 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:46:19,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2019-11-20 04:46:19,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2642. [2019-11-20 04:46:19,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2642 states. [2019-11-20 04:46:19,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 6637 transitions. [2019-11-20 04:46:19,902 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 6637 transitions. Word has length 26 [2019-11-20 04:46:19,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:19,902 INFO L462 AbstractCegarLoop]: Abstraction has 2642 states and 6637 transitions. [2019-11-20 04:46:19,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 04:46:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 6637 transitions. [2019-11-20 04:46:19,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 04:46:19,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:19,905 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:19,906 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:19,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:19,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1839711820, now seen corresponding path program 1 times [2019-11-20 04:46:19,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:19,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867997678] [2019-11-20 04:46:19,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:20,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867997678] [2019-11-20 04:46:20,014 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730675342] [2019-11-20 04:46:20,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:20,108 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 04:46:20,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:20,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:20,176 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:20,180 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:20,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:20,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-20 04:46:20,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951575639] [2019-11-20 04:46:20,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 04:46:20,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:20,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 04:46:20,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 04:46:20,194 INFO L87 Difference]: Start difference. First operand 2642 states and 6637 transitions. Second operand 8 states. [2019-11-20 04:46:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:20,483 INFO L93 Difference]: Finished difference Result 4847 states and 11929 transitions. [2019-11-20 04:46:20,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 04:46:20,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-20 04:46:20,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:20,505 INFO L225 Difference]: With dead ends: 4847 [2019-11-20 04:46:20,505 INFO L226 Difference]: Without dead ends: 3146 [2019-11-20 04:46:20,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-20 04:46:20,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2019-11-20 04:46:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 3038. [2019-11-20 04:46:20,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3038 states. [2019-11-20 04:46:20,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3038 states to 3038 states and 7465 transitions. [2019-11-20 04:46:20,596 INFO L78 Accepts]: Start accepts. Automaton has 3038 states and 7465 transitions. Word has length 30 [2019-11-20 04:46:20,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:20,597 INFO L462 AbstractCegarLoop]: Abstraction has 3038 states and 7465 transitions. [2019-11-20 04:46:20,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 04:46:20,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3038 states and 7465 transitions. [2019-11-20 04:46:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 04:46:20,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:20,600 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:20,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:20,812 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:20,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:20,812 INFO L82 PathProgramCache]: Analyzing trace with hash 936841772, now seen corresponding path program 1 times [2019-11-20 04:46:20,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:20,813 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706425050] [2019-11-20 04:46:20,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:20,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706425050] [2019-11-20 04:46:20,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364258798] [2019-11-20 04:46:20,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:21,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 04:46:21,086 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:21,119 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:21,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:21,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:21,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:21,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-20 04:46:21,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156143891] [2019-11-20 04:46:21,127 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 04:46:21,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:21,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 04:46:21,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 04:46:21,128 INFO L87 Difference]: Start difference. First operand 3038 states and 7465 transitions. Second operand 8 states. [2019-11-20 04:46:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:21,376 INFO L93 Difference]: Finished difference Result 5603 states and 13441 transitions. [2019-11-20 04:46:21,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 04:46:21,377 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-11-20 04:46:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:21,413 INFO L225 Difference]: With dead ends: 5603 [2019-11-20 04:46:21,413 INFO L226 Difference]: Without dead ends: 3902 [2019-11-20 04:46:21,414 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-11-20 04:46:21,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2019-11-20 04:46:21,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3290. [2019-11-20 04:46:21,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3290 states. [2019-11-20 04:46:21,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 7933 transitions. [2019-11-20 04:46:21,534 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 7933 transitions. Word has length 30 [2019-11-20 04:46:21,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:21,535 INFO L462 AbstractCegarLoop]: Abstraction has 3290 states and 7933 transitions. [2019-11-20 04:46:21,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 04:46:21,535 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 7933 transitions. [2019-11-20 04:46:21,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 04:46:21,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:21,542 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:21,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:21,745 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:21,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1200506388, now seen corresponding path program 1 times [2019-11-20 04:46:21,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:21,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132446837] [2019-11-20 04:46:21,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 04:46:22,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132446837] [2019-11-20 04:46:22,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492322245] [2019-11-20 04:46:22,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:22,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 04:46:22,107 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:22,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:22,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 04:46:22,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:22,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-20 04:46:22,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052225276] [2019-11-20 04:46:22,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 04:46:22,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 04:46:22,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-20 04:46:22,131 INFO L87 Difference]: Start difference. First operand 3290 states and 7933 transitions. Second operand 9 states. [2019-11-20 04:46:22,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:22,434 INFO L93 Difference]: Finished difference Result 5855 states and 13945 transitions. [2019-11-20 04:46:22,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 04:46:22,435 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2019-11-20 04:46:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:22,445 INFO L225 Difference]: With dead ends: 5855 [2019-11-20 04:46:22,446 INFO L226 Difference]: Without dead ends: 3722 [2019-11-20 04:46:22,446 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-11-20 04:46:22,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2019-11-20 04:46:22,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3470. [2019-11-20 04:46:22,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3470 states. [2019-11-20 04:46:22,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 8329 transitions. [2019-11-20 04:46:22,551 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 8329 transitions. Word has length 38 [2019-11-20 04:46:22,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:22,552 INFO L462 AbstractCegarLoop]: Abstraction has 3470 states and 8329 transitions. [2019-11-20 04:46:22,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 04:46:22,552 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 8329 transitions. [2019-11-20 04:46:22,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 04:46:22,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:22,556 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:22,768 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:22,768 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:22,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:22,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1894670604, now seen corresponding path program 2 times [2019-11-20 04:46:22,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:22,769 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532949022] [2019-11-20 04:46:22,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:22,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532949022] [2019-11-20 04:46:22,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434390177] [2019-11-20 04:46:22,868 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:22,939 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:46:22,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:22,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 04:46:22,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:22,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:22,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:22,965 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:22,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:22,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-20 04:46:22,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180184894] [2019-11-20 04:46:22,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 04:46:22,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:22,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 04:46:22,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:46:22,974 INFO L87 Difference]: Start difference. First operand 3470 states and 8329 transitions. Second operand 10 states. [2019-11-20 04:46:23,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:23,368 INFO L93 Difference]: Finished difference Result 6665 states and 16006 transitions. [2019-11-20 04:46:23,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 04:46:23,369 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2019-11-20 04:46:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:23,377 INFO L225 Difference]: With dead ends: 6665 [2019-11-20 04:46:23,378 INFO L226 Difference]: Without dead ends: 3794 [2019-11-20 04:46:23,378 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2019-11-20 04:46:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2019-11-20 04:46:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 2894. [2019-11-20 04:46:23,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2894 states. [2019-11-20 04:46:23,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2894 states to 2894 states and 7135 transitions. [2019-11-20 04:46:23,463 INFO L78 Accepts]: Start accepts. Automaton has 2894 states and 7135 transitions. Word has length 38 [2019-11-20 04:46:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:23,463 INFO L462 AbstractCegarLoop]: Abstraction has 2894 states and 7135 transitions. [2019-11-20 04:46:23,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 04:46:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 2894 states and 7135 transitions. [2019-11-20 04:46:23,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-20 04:46:23,466 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:23,467 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:23,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:23,678 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:23,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:23,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1824274737, now seen corresponding path program 3 times [2019-11-20 04:46:23,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:23,678 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366142466] [2019-11-20 04:46:23,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:23,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366142466] [2019-11-20 04:46:23,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933268449] [2019-11-20 04:46:23,811 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:23,900 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-20 04:46:23,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:23,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 04:46:23,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:23,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:23,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:23,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:23,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:23,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-20 04:46:23,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634307398] [2019-11-20 04:46:23,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 04:46:23,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:23,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 04:46:23,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 04:46:23,933 INFO L87 Difference]: Start difference. First operand 2894 states and 7135 transitions. Second operand 11 states. [2019-11-20 04:46:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:24,260 INFO L93 Difference]: Finished difference Result 5999 states and 14233 transitions. [2019-11-20 04:46:24,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 04:46:24,260 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2019-11-20 04:46:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:24,278 INFO L225 Difference]: With dead ends: 5999 [2019-11-20 04:46:24,278 INFO L226 Difference]: Without dead ends: 4298 [2019-11-20 04:46:24,279 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-11-20 04:46:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2019-11-20 04:46:24,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 4046. [2019-11-20 04:46:24,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4046 states. [2019-11-20 04:46:24,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4046 states to 4046 states and 9481 transitions. [2019-11-20 04:46:24,383 INFO L78 Accepts]: Start accepts. Automaton has 4046 states and 9481 transitions. Word has length 42 [2019-11-20 04:46:24,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:24,384 INFO L462 AbstractCegarLoop]: Abstraction has 4046 states and 9481 transitions. [2019-11-20 04:46:24,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 04:46:24,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4046 states and 9481 transitions. [2019-11-20 04:46:24,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-20 04:46:24,390 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:24,390 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:24,601 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:24,601 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:24,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:24,602 INFO L82 PathProgramCache]: Analyzing trace with hash 951635948, now seen corresponding path program 4 times [2019-11-20 04:46:24,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:24,604 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772317604] [2019-11-20 04:46:24,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:24,764 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:24,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772317604] [2019-11-20 04:46:24,765 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096924266] [2019-11-20 04:46:24,765 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:24,822 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 04:46:24,822 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:24,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 04:46:24,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:24,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:24,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:24,881 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:24,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:24,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-20 04:46:24,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871911202] [2019-11-20 04:46:24,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 04:46:24,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:24,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 04:46:24,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-20 04:46:24,883 INFO L87 Difference]: Start difference. First operand 4046 states and 9481 transitions. Second operand 12 states. [2019-11-20 04:46:25,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:25,249 INFO L93 Difference]: Finished difference Result 6359 states and 14953 transitions. [2019-11-20 04:46:25,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 04:46:25,249 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2019-11-20 04:46:25,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:25,310 INFO L225 Difference]: With dead ends: 6359 [2019-11-20 04:46:25,310 INFO L226 Difference]: Without dead ends: 4226 [2019-11-20 04:46:25,310 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-11-20 04:46:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2019-11-20 04:46:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3182. [2019-11-20 04:46:25,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3182 states. [2019-11-20 04:46:25,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3182 states to 3182 states and 7711 transitions. [2019-11-20 04:46:25,404 INFO L78 Accepts]: Start accepts. Automaton has 3182 states and 7711 transitions. Word has length 46 [2019-11-20 04:46:25,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:25,404 INFO L462 AbstractCegarLoop]: Abstraction has 3182 states and 7711 transitions. [2019-11-20 04:46:25,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 04:46:25,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3182 states and 7711 transitions. [2019-11-20 04:46:25,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-20 04:46:25,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:25,408 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:25,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:25,614 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:25,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:25,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1125298961, now seen corresponding path program 5 times [2019-11-20 04:46:25,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:25,614 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656314621] [2019-11-20 04:46:25,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:25,824 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:25,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656314621] [2019-11-20 04:46:25,824 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291289175] [2019-11-20 04:46:25,825 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:25,914 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-20 04:46:25,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:25,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 04:46:25,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:25,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:25,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:25,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:25,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:25,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-20 04:46:25,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781798463] [2019-11-20 04:46:25,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 04:46:25,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:25,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 04:46:25,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-20 04:46:25,960 INFO L87 Difference]: Start difference. First operand 3182 states and 7711 transitions. Second operand 13 states. [2019-11-20 04:46:26,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:26,373 INFO L93 Difference]: Finished difference Result 6575 states and 15385 transitions. [2019-11-20 04:46:26,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 04:46:26,374 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2019-11-20 04:46:26,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:26,382 INFO L225 Difference]: With dead ends: 6575 [2019-11-20 04:46:26,382 INFO L226 Difference]: Without dead ends: 4874 [2019-11-20 04:46:26,383 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2019-11-20 04:46:26,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2019-11-20 04:46:26,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 4622. [2019-11-20 04:46:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4622 states. [2019-11-20 04:46:26,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 10633 transitions. [2019-11-20 04:46:26,477 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 10633 transitions. Word has length 50 [2019-11-20 04:46:26,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:26,478 INFO L462 AbstractCegarLoop]: Abstraction has 4622 states and 10633 transitions. [2019-11-20 04:46:26,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 04:46:26,478 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 10633 transitions. [2019-11-20 04:46:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-20 04:46:26,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:26,484 INFO L410 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:26,689 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:26,690 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:26,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:26,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1172939060, now seen corresponding path program 6 times [2019-11-20 04:46:26,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:26,690 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138424022] [2019-11-20 04:46:26,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:26,879 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:26,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138424022] [2019-11-20 04:46:26,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385000643] [2019-11-20 04:46:26,880 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:26,950 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-20 04:46:26,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:26,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 04:46:26,955 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:26,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:26,988 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:26,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:26,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:26,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-20 04:46:26,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004419308] [2019-11-20 04:46:26,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 04:46:26,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:26,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 04:46:26,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-20 04:46:26,995 INFO L87 Difference]: Start difference. First operand 4622 states and 10633 transitions. Second operand 14 states. [2019-11-20 04:46:27,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:27,472 INFO L93 Difference]: Finished difference Result 6935 states and 16105 transitions. [2019-11-20 04:46:27,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 04:46:27,473 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-11-20 04:46:27,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:27,481 INFO L225 Difference]: With dead ends: 6935 [2019-11-20 04:46:27,481 INFO L226 Difference]: Without dead ends: 5234 [2019-11-20 04:46:27,482 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 [2019-11-20 04:46:27,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5234 states. [2019-11-20 04:46:27,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5234 to 3686. [2019-11-20 04:46:27,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3686 states. [2019-11-20 04:46:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3686 states to 3686 states and 8719 transitions. [2019-11-20 04:46:27,567 INFO L78 Accepts]: Start accepts. Automaton has 3686 states and 8719 transitions. Word has length 54 [2019-11-20 04:46:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:27,567 INFO L462 AbstractCegarLoop]: Abstraction has 3686 states and 8719 transitions. [2019-11-20 04:46:27,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 04:46:27,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3686 states and 8719 transitions. [2019-11-20 04:46:27,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-20 04:46:27,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:27,572 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:27,775 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:27,776 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:27,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:27,776 INFO L82 PathProgramCache]: Analyzing trace with hash 2009156849, now seen corresponding path program 7 times [2019-11-20 04:46:27,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:27,776 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942054951] [2019-11-20 04:46:27,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:27,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942054951] [2019-11-20 04:46:27,995 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718637864] [2019-11-20 04:46:27,995 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:28,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 04:46:28,094 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:28,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:28,127 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:28,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:28,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-20 04:46:28,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122761525] [2019-11-20 04:46:28,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 04:46:28,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:28,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 04:46:28,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-20 04:46:28,134 INFO L87 Difference]: Start difference. First operand 3686 states and 8719 transitions. Second operand 15 states. [2019-11-20 04:46:28,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:28,682 INFO L93 Difference]: Finished difference Result 8465 states and 19606 transitions. [2019-11-20 04:46:28,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-20 04:46:28,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2019-11-20 04:46:28,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:28,687 INFO L225 Difference]: With dead ends: 8465 [2019-11-20 04:46:28,687 INFO L226 Difference]: Without dead ends: 5810 [2019-11-20 04:46:28,687 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=539, Unknown=0, NotChecked=0, Total=756 [2019-11-20 04:46:28,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5810 states. [2019-11-20 04:46:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5810 to 3839. [2019-11-20 04:46:28,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3839 states. [2019-11-20 04:46:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 9031 transitions. [2019-11-20 04:46:28,768 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 9031 transitions. Word has length 58 [2019-11-20 04:46:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:28,769 INFO L462 AbstractCegarLoop]: Abstraction has 3839 states and 9031 transitions. [2019-11-20 04:46:28,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 04:46:28,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 9031 transitions. [2019-11-20 04:46:28,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-20 04:46:28,773 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:28,774 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:28,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:28,977 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:28,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:28,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1072106924, now seen corresponding path program 8 times [2019-11-20 04:46:28,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:28,979 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954977782] [2019-11-20 04:46:28,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:29,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954977782] [2019-11-20 04:46:29,196 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592457652] [2019-11-20 04:46:29,196 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:29,260 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:46:29,260 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:29,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 04:46:29,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:29,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:29,290 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:29,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:29,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:29,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-20 04:46:29,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452024439] [2019-11-20 04:46:29,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 04:46:29,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:29,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 04:46:29,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-11-20 04:46:29,299 INFO L87 Difference]: Start difference. First operand 3839 states and 9031 transitions. Second operand 16 states. [2019-11-20 04:46:29,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:29,804 INFO L93 Difference]: Finished difference Result 8609 states and 19894 transitions. [2019-11-20 04:46:29,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 04:46:29,806 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 62 [2019-11-20 04:46:29,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:29,811 INFO L225 Difference]: With dead ends: 8609 [2019-11-20 04:46:29,811 INFO L226 Difference]: Without dead ends: 5954 [2019-11-20 04:46:29,812 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 [2019-11-20 04:46:29,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5954 states. [2019-11-20 04:46:29,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5954 to 3974. [2019-11-20 04:46:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3974 states. [2019-11-20 04:46:29,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3974 states to 3974 states and 9295 transitions. [2019-11-20 04:46:29,894 INFO L78 Accepts]: Start accepts. Automaton has 3974 states and 9295 transitions. Word has length 62 [2019-11-20 04:46:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:29,895 INFO L462 AbstractCegarLoop]: Abstraction has 3974 states and 9295 transitions. [2019-11-20 04:46:29,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 04:46:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 3974 states and 9295 transitions. [2019-11-20 04:46:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-20 04:46:29,903 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:29,903 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:30,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:30,107 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:30,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:30,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1062730031, now seen corresponding path program 9 times [2019-11-20 04:46:30,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:30,107 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530145561] [2019-11-20 04:46:30,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:30,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530145561] [2019-11-20 04:46:30,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602742604] [2019-11-20 04:46:30,287 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:30,368 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-20 04:46:30,368 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:30,369 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 04:46:30,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:30,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:30,391 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:30,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:30,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-20 04:46:30,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643161019] [2019-11-20 04:46:30,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 04:46:30,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:30,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 04:46:30,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-20 04:46:30,398 INFO L87 Difference]: Start difference. First operand 3974 states and 9295 transitions. Second operand 17 states. [2019-11-20 04:46:30,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:30,913 INFO L93 Difference]: Finished difference Result 9041 states and 20758 transitions. [2019-11-20 04:46:30,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 04:46:30,913 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 66 [2019-11-20 04:46:30,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:30,918 INFO L225 Difference]: With dead ends: 9041 [2019-11-20 04:46:30,918 INFO L226 Difference]: Without dead ends: 6386 [2019-11-20 04:46:30,919 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2019-11-20 04:46:30,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6386 states. [2019-11-20 04:46:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6386 to 4127. [2019-11-20 04:46:30,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4127 states. [2019-11-20 04:46:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4127 states to 4127 states and 9607 transitions. [2019-11-20 04:46:31,006 INFO L78 Accepts]: Start accepts. Automaton has 4127 states and 9607 transitions. Word has length 66 [2019-11-20 04:46:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:31,007 INFO L462 AbstractCegarLoop]: Abstraction has 4127 states and 9607 transitions. [2019-11-20 04:46:31,007 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 04:46:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 4127 states and 9607 transitions. [2019-11-20 04:46:31,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-20 04:46:31,012 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:31,012 INFO L410 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:31,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:31,224 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:31,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:31,224 INFO L82 PathProgramCache]: Analyzing trace with hash 889904268, now seen corresponding path program 10 times [2019-11-20 04:46:31,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:31,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434918951] [2019-11-20 04:46:31,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:31,472 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:31,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434918951] [2019-11-20 04:46:31,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538471258] [2019-11-20 04:46:31,473 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:31,550 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 04:46:31,550 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:31,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 04:46:31,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:31,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:31,592 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:31,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:31,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-20 04:46:31,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985719774] [2019-11-20 04:46:31,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 04:46:31,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:31,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 04:46:31,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-11-20 04:46:31,605 INFO L87 Difference]: Start difference. First operand 4127 states and 9607 transitions. Second operand 18 states. [2019-11-20 04:46:32,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:32,331 INFO L93 Difference]: Finished difference Result 9185 states and 21046 transitions. [2019-11-20 04:46:32,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 04:46:32,331 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 70 [2019-11-20 04:46:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:32,335 INFO L225 Difference]: With dead ends: 9185 [2019-11-20 04:46:32,336 INFO L226 Difference]: Without dead ends: 6530 [2019-11-20 04:46:32,336 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2019-11-20 04:46:32,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6530 states. [2019-11-20 04:46:32,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6530 to 4262. [2019-11-20 04:46:32,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4262 states. [2019-11-20 04:46:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4262 states to 4262 states and 9871 transitions. [2019-11-20 04:46:32,414 INFO L78 Accepts]: Start accepts. Automaton has 4262 states and 9871 transitions. Word has length 70 [2019-11-20 04:46:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:32,415 INFO L462 AbstractCegarLoop]: Abstraction has 4262 states and 9871 transitions. [2019-11-20 04:46:32,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 04:46:32,415 INFO L276 IsEmpty]: Start isEmpty. Operand 4262 states and 9871 transitions. [2019-11-20 04:46:32,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-20 04:46:32,420 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:32,420 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:32,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:32,624 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:32,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:32,624 INFO L82 PathProgramCache]: Analyzing trace with hash -207167311, now seen corresponding path program 11 times [2019-11-20 04:46:32,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:32,625 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255686772] [2019-11-20 04:46:32,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:32,830 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:32,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255686772] [2019-11-20 04:46:32,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289779304] [2019-11-20 04:46:32,830 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:32,894 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-20 04:46:32,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:32,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 04:46:32,896 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:32,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:32,919 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:32,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:32,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-20 04:46:32,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926097596] [2019-11-20 04:46:32,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-20 04:46:32,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:32,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-20 04:46:32,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-11-20 04:46:32,927 INFO L87 Difference]: Start difference. First operand 4262 states and 9871 transitions. Second operand 19 states. [2019-11-20 04:46:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:33,504 INFO L93 Difference]: Finished difference Result 9473 states and 21622 transitions. [2019-11-20 04:46:33,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-20 04:46:33,505 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 74 [2019-11-20 04:46:33,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:33,510 INFO L225 Difference]: With dead ends: 9473 [2019-11-20 04:46:33,510 INFO L226 Difference]: Without dead ends: 6602 [2019-11-20 04:46:33,510 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=897, Unknown=0, NotChecked=0, Total=1260 [2019-11-20 04:46:33,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6602 states. [2019-11-20 04:46:33,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6602 to 6350. [2019-11-20 04:46:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6350 states. [2019-11-20 04:46:33,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6350 states to 6350 states and 14089 transitions. [2019-11-20 04:46:33,608 INFO L78 Accepts]: Start accepts. Automaton has 6350 states and 14089 transitions. Word has length 74 [2019-11-20 04:46:33,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:33,608 INFO L462 AbstractCegarLoop]: Abstraction has 6350 states and 14089 transitions. [2019-11-20 04:46:33,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-20 04:46:33,609 INFO L276 IsEmpty]: Start isEmpty. Operand 6350 states and 14089 transitions. [2019-11-20 04:46:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-20 04:46:33,617 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:33,617 INFO L410 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:33,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:33,820 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:33,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:33,821 INFO L82 PathProgramCache]: Analyzing trace with hash 610388844, now seen corresponding path program 12 times [2019-11-20 04:46:33,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:33,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529090512] [2019-11-20 04:46:33,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:34,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529090512] [2019-11-20 04:46:34,098 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400025523] [2019-11-20 04:46:34,098 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:34,180 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-11-20 04:46:34,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:34,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 04:46:34,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:34,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:34,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:34,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:34,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:34,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-20 04:46:34,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163096536] [2019-11-20 04:46:34,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 04:46:34,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:34,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 04:46:34,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2019-11-20 04:46:34,238 INFO L87 Difference]: Start difference. First operand 6350 states and 14089 transitions. Second operand 20 states. [2019-11-20 04:46:35,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:35,049 INFO L93 Difference]: Finished difference Result 9797 states and 22270 transitions. [2019-11-20 04:46:35,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 04:46:35,049 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 78 [2019-11-20 04:46:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:35,055 INFO L225 Difference]: With dead ends: 9797 [2019-11-20 04:46:35,055 INFO L226 Difference]: Without dead ends: 7142 [2019-11-20 04:46:35,055 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=371, Invalid=1035, Unknown=0, NotChecked=0, Total=1406 [2019-11-20 04:46:35,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7142 states. [2019-11-20 04:46:35,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7142 to 6638. [2019-11-20 04:46:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6638 states. [2019-11-20 04:46:35,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 14665 transitions. [2019-11-20 04:46:35,152 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 14665 transitions. Word has length 78 [2019-11-20 04:46:35,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:35,153 INFO L462 AbstractCegarLoop]: Abstraction has 6638 states and 14665 transitions. [2019-11-20 04:46:35,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 04:46:35,153 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 14665 transitions. [2019-11-20 04:46:35,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-20 04:46:35,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:35,161 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:35,373 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:35,373 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:35,373 INFO L82 PathProgramCache]: Analyzing trace with hash 111008401, now seen corresponding path program 13 times [2019-11-20 04:46:35,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:35,374 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698623409] [2019-11-20 04:46:35,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:35,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698623409] [2019-11-20 04:46:35,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385822201] [2019-11-20 04:46:35,621 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:35,775 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 04:46:35,777 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:35,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:35,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:35,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:35,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-11-20 04:46:35,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226915750] [2019-11-20 04:46:35,841 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 04:46:35,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:35,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 04:46:35,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2019-11-20 04:46:35,842 INFO L87 Difference]: Start difference. First operand 6638 states and 14665 transitions. Second operand 21 states. [2019-11-20 04:46:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:36,641 INFO L93 Difference]: Finished difference Result 9095 states and 20425 transitions. [2019-11-20 04:46:36,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-20 04:46:36,642 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 82 [2019-11-20 04:46:36,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:36,649 INFO L225 Difference]: With dead ends: 9095 [2019-11-20 04:46:36,650 INFO L226 Difference]: Without dead ends: 7394 [2019-11-20 04:46:36,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=441, Invalid=1041, Unknown=0, NotChecked=0, Total=1482 [2019-11-20 04:46:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7394 states. [2019-11-20 04:46:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7394 to 4703. [2019-11-20 04:46:36,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4703 states. [2019-11-20 04:46:36,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 10759 transitions. [2019-11-20 04:46:36,725 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 10759 transitions. Word has length 82 [2019-11-20 04:46:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:36,725 INFO L462 AbstractCegarLoop]: Abstraction has 4703 states and 10759 transitions. [2019-11-20 04:46:36,725 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 04:46:36,725 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 10759 transitions. [2019-11-20 04:46:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-11-20 04:46:36,731 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:36,731 INFO L410 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:36,934 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:36,935 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:36,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:36,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1194599860, now seen corresponding path program 14 times [2019-11-20 04:46:36,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:36,936 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510678202] [2019-11-20 04:46:36,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:36,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:37,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510678202] [2019-11-20 04:46:37,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196970792] [2019-11-20 04:46:37,216 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:37,304 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 04:46:37,304 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:37,305 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 04:46:37,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:37,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:37,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:37,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:37,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:37,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-11-20 04:46:37,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542572638] [2019-11-20 04:46:37,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 04:46:37,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:37,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 04:46:37,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-11-20 04:46:37,368 INFO L87 Difference]: Start difference. First operand 4703 states and 10759 transitions. Second operand 22 states. [2019-11-20 04:46:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:38,295 INFO L93 Difference]: Finished difference Result 10337 states and 23350 transitions. [2019-11-20 04:46:38,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-20 04:46:38,296 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 86 [2019-11-20 04:46:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:38,301 INFO L225 Difference]: With dead ends: 10337 [2019-11-20 04:46:38,301 INFO L226 Difference]: Without dead ends: 7682 [2019-11-20 04:46:38,302 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=455, Invalid=1267, Unknown=0, NotChecked=0, Total=1722 [2019-11-20 04:46:38,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7682 states. [2019-11-20 04:46:38,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7682 to 4838. [2019-11-20 04:46:38,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4838 states. [2019-11-20 04:46:38,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4838 states to 4838 states and 11023 transitions. [2019-11-20 04:46:38,369 INFO L78 Accepts]: Start accepts. Automaton has 4838 states and 11023 transitions. Word has length 86 [2019-11-20 04:46:38,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:38,369 INFO L462 AbstractCegarLoop]: Abstraction has 4838 states and 11023 transitions. [2019-11-20 04:46:38,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 04:46:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand 4838 states and 11023 transitions. [2019-11-20 04:46:38,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-20 04:46:38,375 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:38,375 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:38,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:38,578 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:38,579 INFO L82 PathProgramCache]: Analyzing trace with hash 258798705, now seen corresponding path program 15 times [2019-11-20 04:46:38,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:38,579 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114731079] [2019-11-20 04:46:38,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:38,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114731079] [2019-11-20 04:46:38,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168587887] [2019-11-20 04:46:38,847 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:38,914 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-20 04:46:38,914 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:38,915 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 04:46:38,916 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:38,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:38,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:38,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:38,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:38,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-11-20 04:46:38,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525477868] [2019-11-20 04:46:38,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-20 04:46:38,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:38,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-20 04:46:38,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2019-11-20 04:46:38,952 INFO L87 Difference]: Start difference. First operand 4838 states and 11023 transitions. Second operand 23 states. [2019-11-20 04:46:39,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:39,753 INFO L93 Difference]: Finished difference Result 10625 states and 23926 transitions. [2019-11-20 04:46:39,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-20 04:46:39,758 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2019-11-20 04:46:39,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:39,765 INFO L225 Difference]: With dead ends: 10625 [2019-11-20 04:46:39,765 INFO L226 Difference]: Without dead ends: 7754 [2019-11-20 04:46:39,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=494, Invalid=1398, Unknown=0, NotChecked=0, Total=1892 [2019-11-20 04:46:39,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7754 states. [2019-11-20 04:46:39,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7754 to 7502. [2019-11-20 04:46:39,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7502 states. [2019-11-20 04:46:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7502 states to 7502 states and 16393 transitions. [2019-11-20 04:46:39,863 INFO L78 Accepts]: Start accepts. Automaton has 7502 states and 16393 transitions. Word has length 90 [2019-11-20 04:46:39,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:39,863 INFO L462 AbstractCegarLoop]: Abstraction has 7502 states and 16393 transitions. [2019-11-20 04:46:39,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-20 04:46:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7502 states and 16393 transitions. [2019-11-20 04:46:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-20 04:46:39,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:39,873 INFO L410 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:40,077 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:40,077 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:40,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1121384148, now seen corresponding path program 16 times [2019-11-20 04:46:40,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:40,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10885178] [2019-11-20 04:46:40,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:40,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:40,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10885178] [2019-11-20 04:46:40,424 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799447858] [2019-11-20 04:46:40,425 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:40,509 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 04:46:40,509 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:40,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 04:46:40,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:40,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:40,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:40,564 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:40,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:40,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2019-11-20 04:46:40,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663563345] [2019-11-20 04:46:40,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-20 04:46:40,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:40,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-20 04:46:40,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2019-11-20 04:46:40,566 INFO L87 Difference]: Start difference. First operand 7502 states and 16393 transitions. Second operand 24 states. [2019-11-20 04:46:41,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:41,356 INFO L93 Difference]: Finished difference Result 10697 states and 24070 transitions. [2019-11-20 04:46:41,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-20 04:46:41,357 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 94 [2019-11-20 04:46:41,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:41,362 INFO L225 Difference]: With dead ends: 10697 [2019-11-20 04:46:41,363 INFO L226 Difference]: Without dead ends: 7826 [2019-11-20 04:46:41,363 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=1417, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 04:46:41,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7826 states. [2019-11-20 04:46:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7826 to 4910. [2019-11-20 04:46:41,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4910 states. [2019-11-20 04:46:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4910 states to 4910 states and 11167 transitions. [2019-11-20 04:46:41,440 INFO L78 Accepts]: Start accepts. Automaton has 4910 states and 11167 transitions. Word has length 94 [2019-11-20 04:46:41,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:41,440 INFO L462 AbstractCegarLoop]: Abstraction has 4910 states and 11167 transitions. [2019-11-20 04:46:41,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-20 04:46:41,440 INFO L276 IsEmpty]: Start isEmpty. Operand 4910 states and 11167 transitions. [2019-11-20 04:46:41,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-20 04:46:41,446 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:41,446 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:41,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:41,666 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:41,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:41,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1140076113, now seen corresponding path program 17 times [2019-11-20 04:46:41,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:41,666 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570481217] [2019-11-20 04:46:41,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:41,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570481217] [2019-11-20 04:46:41,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474803861] [2019-11-20 04:46:41,985 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:42,055 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-11-20 04:46:42,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:42,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-20 04:46:42,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:42,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:42,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:46:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:42,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:42,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-11-20 04:46:42,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245014702] [2019-11-20 04:46:42,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-20 04:46:42,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:42,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-20 04:46:42,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2019-11-20 04:46:42,089 INFO L87 Difference]: Start difference. First operand 4910 states and 11167 transitions. Second operand 25 states. [2019-11-20 04:46:42,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:42,935 INFO L93 Difference]: Finished difference Result 9887 states and 22009 transitions. [2019-11-20 04:46:42,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-20 04:46:42,935 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 98 [2019-11-20 04:46:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:42,943 INFO L225 Difference]: With dead ends: 9887 [2019-11-20 04:46:42,943 INFO L226 Difference]: Without dead ends: 7970 [2019-11-20 04:46:42,944 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=647, Invalid=1515, Unknown=0, NotChecked=0, Total=2162 [2019-11-20 04:46:42,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7970 states. [2019-11-20 04:46:42,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7970 to 5063. [2019-11-20 04:46:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5063 states. [2019-11-20 04:46:43,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5063 states to 5063 states and 11479 transitions. [2019-11-20 04:46:43,004 INFO L78 Accepts]: Start accepts. Automaton has 5063 states and 11479 transitions. Word has length 98 [2019-11-20 04:46:43,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:43,005 INFO L462 AbstractCegarLoop]: Abstraction has 5063 states and 11479 transitions. [2019-11-20 04:46:43,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-20 04:46:43,005 INFO L276 IsEmpty]: Start isEmpty. Operand 5063 states and 11479 transitions. [2019-11-20 04:46:43,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-20 04:46:43,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:43,010 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:43,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:43,210 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:43,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:43,210 INFO L82 PathProgramCache]: Analyzing trace with hash 475617292, now seen corresponding path program 18 times [2019-11-20 04:46:43,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:43,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191843637] [2019-11-20 04:46:43,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 315 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:43,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191843637] [2019-11-20 04:46:43,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571345726] [2019-11-20 04:46:43,509 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:43,605 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2019-11-20 04:46:43,605 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 04:46:43,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 04:46:43,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:43,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 04:46:43,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2019-11-20 04:46:43,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965423325] [2019-11-20 04:46:43,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-20 04:46:43,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:43,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-20 04:46:43,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2019-11-20 04:46:43,655 INFO L87 Difference]: Start difference. First operand 5063 states and 11479 transitions. Second operand 23 states. [2019-11-20 04:46:44,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:44,200 INFO L93 Difference]: Finished difference Result 9119 states and 18964 transitions. [2019-11-20 04:46:44,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-20 04:46:44,201 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 102 [2019-11-20 04:46:44,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:44,203 INFO L225 Difference]: With dead ends: 9119 [2019-11-20 04:46:44,203 INFO L226 Difference]: Without dead ends: 3380 [2019-11-20 04:46:44,204 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 04:46:44,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3380 states. [2019-11-20 04:46:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3380 to 3380. [2019-11-20 04:46:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3380 states. [2019-11-20 04:46:44,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 7657 transitions. [2019-11-20 04:46:44,234 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 7657 transitions. Word has length 102 [2019-11-20 04:46:44,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:44,234 INFO L462 AbstractCegarLoop]: Abstraction has 3380 states and 7657 transitions. [2019-11-20 04:46:44,234 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-20 04:46:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 7657 transitions. [2019-11-20 04:46:44,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-20 04:46:44,237 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:44,237 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:44,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:44,440 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:44,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:44,440 INFO L82 PathProgramCache]: Analyzing trace with hash -863610109, now seen corresponding path program 1 times [2019-11-20 04:46:44,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:44,440 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113336062] [2019-11-20 04:46:44,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 315 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:44,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113336062] [2019-11-20 04:46:44,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567584488] [2019-11-20 04:46:44,831 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:44,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:44,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 04:46:44,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 343 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:44,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 04:46:44,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [23] total 25 [2019-11-20 04:46:44,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246354772] [2019-11-20 04:46:44,969 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-20 04:46:44,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:44,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-20 04:46:44,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2019-11-20 04:46:44,969 INFO L87 Difference]: Start difference. First operand 3380 states and 7657 transitions. Second operand 23 states. [2019-11-20 04:46:45,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:45,422 INFO L93 Difference]: Finished difference Result 7436 states and 15142 transitions. [2019-11-20 04:46:45,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-20 04:46:45,423 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 102 [2019-11-20 04:46:45,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:45,424 INFO L225 Difference]: With dead ends: 7436 [2019-11-20 04:46:45,424 INFO L226 Difference]: Without dead ends: 1697 [2019-11-20 04:46:45,425 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=609, Invalid=1371, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 04:46:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2019-11-20 04:46:45,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 1697. [2019-11-20 04:46:45,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1697 states. [2019-11-20 04:46:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 3835 transitions. [2019-11-20 04:46:45,438 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 3835 transitions. Word has length 102 [2019-11-20 04:46:45,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:45,438 INFO L462 AbstractCegarLoop]: Abstraction has 1697 states and 3835 transitions. [2019-11-20 04:46:45,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-20 04:46:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 3835 transitions. [2019-11-20 04:46:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-20 04:46:45,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:46:45,441 INFO L410 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:46:45,641 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:45,641 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 04:46:45,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:46:45,642 INFO L82 PathProgramCache]: Analyzing trace with hash 770730080, now seen corresponding path program 1 times [2019-11-20 04:46:45,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 04:46:45,642 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813029199] [2019-11-20 04:46:45,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 04:46:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 306 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:45,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813029199] [2019-11-20 04:46:45,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621412229] [2019-11-20 04:46:45,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:46,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:46:46,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 04:46:46,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:46:46,064 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 334 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 04:46:46,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 04:46:46,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2019-11-20 04:46:46,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146094851] [2019-11-20 04:46:46,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-20 04:46:46,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 04:46:46,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-20 04:46:46,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2019-11-20 04:46:46,066 INFO L87 Difference]: Start difference. First operand 1697 states and 3835 transitions. Second operand 25 states. [2019-11-20 04:46:46,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:46:46,463 INFO L93 Difference]: Finished difference Result 5753 states and 11320 transitions. [2019-11-20 04:46:46,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-20 04:46:46,464 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 102 [2019-11-20 04:46:46,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:46:46,464 INFO L225 Difference]: With dead ends: 5753 [2019-11-20 04:46:46,464 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 04:46:46,465 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2019-11-20 04:46:46,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 04:46:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 04:46:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 04:46:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 04:46:46,465 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 102 [2019-11-20 04:46:46,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:46:46,466 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 04:46:46,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-20 04:46:46,466 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 04:46:46,466 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 04:46:46,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 04:46:46,668 INFO L304 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2019-11-20 04:46:46,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 04:46:46 BasicIcfg [2019-11-20 04:46:46,670 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 04:46:46,670 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 04:46:46,670 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 04:46:46,670 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 04:46:46,671 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:46:16" (3/4) ... [2019-11-20 04:46:46,674 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 04:46:46,679 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2019-11-20 04:46:46,679 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2019-11-20 04:46:46,682 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-11-20 04:46:46,682 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-20 04:46:46,682 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 04:46:46,716 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f00a119e-9d93-4982-9db2-fc04fd92cded/bin/uautomizer/witness.graphml [2019-11-20 04:46:46,716 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 04:46:46,718 INFO L168 Benchmark]: Toolchain (without parser) took 31614.82 ms. Allocated memory was 1.0 GB in the beginning and 2.0 GB in the end (delta: 950.5 MB). Free memory was 947.4 MB in the beginning and 1.5 GB in the end (delta: -521.1 MB). Peak memory consumption was 429.5 MB. Max. memory is 11.5 GB. [2019-11-20 04:46:46,718 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:46:46,718 INFO L168 Benchmark]: CACSL2BoogieTranslator took 573.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 947.4 MB in the beginning and 1.1 GB in the end (delta: -154.1 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-11-20 04:46:46,719 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.34 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. [2019-11-20 04:46:46,719 INFO L168 Benchmark]: Boogie Preprocessor took 25.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:46:46,719 INFO L168 Benchmark]: RCFGBuilder took 462.68 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: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 11.5 GB. [2019-11-20 04:46:46,720 INFO L168 Benchmark]: TraceAbstraction took 30458.04 ms. Allocated memory was 1.2 GB in the beginning and 2.0 GB in the end (delta: 811.1 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -402.7 MB). Peak memory consumption was 408.4 MB. Max. memory is 11.5 GB. [2019-11-20 04:46:46,720 INFO L168 Benchmark]: Witness Printer took 46.13 ms. Allocated memory is still 2.0 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. [2019-11-20 04:46:46,721 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 573.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 947.4 MB in the beginning and 1.1 GB in the end (delta: -154.1 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 42.34 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 25.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 462.68 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: 28.4 MB). Peak memory consumption was 28.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 30458.04 ms. Allocated memory was 1.2 GB in the beginning and 2.0 GB in the end (delta: 811.1 MB). Free memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: -402.7 MB). Peak memory consumption was 408.4 MB. Max. memory is 11.5 GB. * Witness Printer took 46.13 ms. Allocated memory is still 2.0 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 101 locations, 1 error locations. Result: SAFE, OverallTime: 30.2s, OverallIterations: 26, TraceHistogramMax: 11, AutomataDifference: 13.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 4962 SDtfs, 23656 SDslu, 34242 SDs, 0 SdLazy, 5197 SolverSat, 4451 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2191 GetRequests, 1517 SyntacticMatches, 0 SemanticMatches, 674 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3979 ImplicationChecksByTransitivity, 10.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8843occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.2s AutomataMinimizationTime, 26 MinimizatonAttempts, 27027 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 3076 NumberOfCodeBlocks, 3076 NumberOfCodeBlocksAsserted, 108 NumberOfCheckSat, 3028 ConstructedInterpolants, 0 QuantifiedInterpolants, 648540 SizeOfPredicates, 330 NumberOfNonLiveVariables, 3622 ConjunctsInSsa, 397 ConjunctsInUnsatCore, 48 InterpolantComputations, 6 PerfectInterpolantSequences, 1958/5964 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...