./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular_false-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 440b8f87b993409470c921154676895cb2b74b47 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 12:49:13,080 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 12:49:13,081 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 12:49:13,088 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 12:49:13,089 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 12:49:13,089 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 12:49:13,090 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 12:49:13,091 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 12:49:13,092 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 12:49:13,093 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 12:49:13,093 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 12:49:13,093 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 12:49:13,094 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 12:49:13,095 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 12:49:13,095 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 12:49:13,096 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 12:49:13,096 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 12:49:13,098 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 12:49:13,099 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 12:49:13,100 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 12:49:13,100 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 12:49:13,101 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 12:49:13,103 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 12:49:13,103 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 12:49:13,103 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 12:49:13,104 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 12:49:13,104 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 12:49:13,105 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 12:49:13,105 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 12:49:13,106 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 12:49:13,106 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 12:49:13,106 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 12:49:13,107 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 12:49:13,107 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 12:49:13,107 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 12:49:13,108 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 12:49:13,108 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2018-11-28 12:49:13,117 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 12:49:13,118 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 12:49:13,118 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-28 12:49:13,118 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-28 12:49:13,119 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 12:49:13,119 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 12:49:13,119 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 12:49:13,119 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 12:49:13,119 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-28 12:49:13,119 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 12:49:13,119 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-28 12:49:13,120 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 12:49:13,120 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-28 12:49:13,120 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-28 12:49:13,120 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-28 12:49:13,120 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-28 12:49:13,120 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 12:49:13,120 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 12:49:13,120 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-28 12:49:13,121 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 12:49:13,121 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 12:49:13,121 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-28 12:49:13,121 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-28 12:49:13,121 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:49:13,121 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 12:49:13,121 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-28 12:49:13,122 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-28 12:49:13,122 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 12:49:13,122 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-28 12:49:13,122 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-28 12:49:13,122 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 440b8f87b993409470c921154676895cb2b74b47 [2018-11-28 12:49:13,144 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 12:49:13,153 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 12:49:13,156 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 12:49:13,157 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 12:49:13,158 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 12:49:13,158 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/../../sv-benchmarks/c/pthread/triangular_false-unreach-call.i [2018-11-28 12:49:13,195 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/data/8e8f1724c/23a2d462d32e48449f989bf2771eee4b/FLAG86da43d53 [2018-11-28 12:49:13,640 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 12:49:13,641 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/sv-benchmarks/c/pthread/triangular_false-unreach-call.i [2018-11-28 12:49:13,651 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/data/8e8f1724c/23a2d462d32e48449f989bf2771eee4b/FLAG86da43d53 [2018-11-28 12:49:13,660 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/data/8e8f1724c/23a2d462d32e48449f989bf2771eee4b [2018-11-28 12:49:13,662 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 12:49:13,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 12:49:13,664 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 12:49:13,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 12:49:13,666 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 12:49:13,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:49:13" (1/1) ... [2018-11-28 12:49:13,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b810661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:49:13, skipping insertion in model container [2018-11-28 12:49:13,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:49:13" (1/1) ... [2018-11-28 12:49:13,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 12:49:13,696 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 12:49:13,890 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:49:13,939 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 12:49:13,972 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 12:49:14,018 INFO L195 MainTranslator]: Completed translation [2018-11-28 12:49:14,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:49:14 WrapperNode [2018-11-28 12:49:14,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 12:49:14,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 12:49:14,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 12:49:14,019 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 12:49:14,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:49:14" (1/1) ... [2018-11-28 12:49:14,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:49:14" (1/1) ... [2018-11-28 12:49:14,045 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 12:49:14,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 12:49:14,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 12:49:14,046 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 12:49:14,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:49:14" (1/1) ... [2018-11-28 12:49:14,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:49:14" (1/1) ... [2018-11-28 12:49:14,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:49:14" (1/1) ... [2018-11-28 12:49:14,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:49:14" (1/1) ... [2018-11-28 12:49:14,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:49:14" (1/1) ... [2018-11-28 12:49:14,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:49:14" (1/1) ... [2018-11-28 12:49:14,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:49:14" (1/1) ... [2018-11-28 12:49:14,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 12:49:14,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 12:49:14,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 12:49:14,065 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 12:49:14,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:49:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-28 12:49:14,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-28 12:49:14,101 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-11-28 12:49:14,101 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-11-28 12:49:14,101 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-11-28 12:49:14,101 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-11-28 12:49:14,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-28 12:49:14,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-11-28 12:49:14,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-28 12:49:14,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-11-28 12:49:14,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 12:49:14,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 12:49:14,102 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-11-28 12:49:14,288 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 12:49:14,288 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-28 12:49:14,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:49:14 BoogieIcfgContainer [2018-11-28 12:49:14,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 12:49:14,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-28 12:49:14,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-28 12:49:14,291 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-28 12:49:14,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:49:13" (1/3) ... [2018-11-28 12:49:14,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a67bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:49:14, skipping insertion in model container [2018-11-28 12:49:14,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:49:14" (2/3) ... [2018-11-28 12:49:14,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77a67bfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:49:14, skipping insertion in model container [2018-11-28 12:49:14,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:49:14" (3/3) ... [2018-11-28 12:49:14,293 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular_false-unreach-call.i [2018-11-28 12:49:14,314 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,314 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,315 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,315 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,315 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,315 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,315 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,316 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,316 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,316 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,316 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,316 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,316 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,317 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,317 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,317 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,317 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,317 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,317 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,318 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,318 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,318 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,318 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,318 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,319 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,319 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,319 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,319 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-28 12:49:14,326 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-11-28 12:49:14,326 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-28 12:49:14,331 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-28 12:49:14,340 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-28 12:49:14,354 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 12:49:14,355 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-28 12:49:14,355 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-28 12:49:14,355 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-28 12:49:14,355 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 12:49:14,355 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 12:49:14,355 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-28 12:49:14,355 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 12:49:14,355 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-28 12:49:14,361 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-11-28 12:49:14,400 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-11-28 12:49:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-11-28 12:49:14,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-28 12:49:14,407 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:14,408 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:14,410 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:14,413 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:14,413 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-11-28 12:49:14,414 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:14,415 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:14,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:14,453 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:49:14,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:14,585 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:49:14,585 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:49:14,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:49:14,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:49:14,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:49:14,602 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-11-28 12:49:14,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:14,692 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-11-28 12:49:14,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:49:14,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-28 12:49:14,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:14,705 INFO L225 Difference]: With dead ends: 1411 [2018-11-28 12:49:14,705 INFO L226 Difference]: Without dead ends: 322 [2018-11-28 12:49:14,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:49:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-11-28 12:49:14,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-11-28 12:49:14,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-28 12:49:14,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-11-28 12:49:14,745 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-11-28 12:49:14,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:14,746 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-11-28 12:49:14,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:49:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-11-28 12:49:14,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-28 12:49:14,747 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:14,747 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:14,747 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:14,748 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:14,748 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-11-28 12:49:14,748 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:14,748 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:14,752 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:14,753 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:49:14,753 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:14,815 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:49:14,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-28 12:49:14,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-28 12:49:14,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-28 12:49:14,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-28 12:49:14,817 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-11-28 12:49:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:14,857 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-11-28 12:49:14,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-28 12:49:14,857 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-28 12:49:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:14,859 INFO L225 Difference]: With dead ends: 411 [2018-11-28 12:49:14,859 INFO L226 Difference]: Without dead ends: 290 [2018-11-28 12:49:14,860 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:49:14,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-11-28 12:49:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-11-28 12:49:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-11-28 12:49:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-11-28 12:49:14,872 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-11-28 12:49:14,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:14,872 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-11-28 12:49:14,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-28 12:49:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-11-28 12:49:14,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 12:49:14,874 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:14,874 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:14,874 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:14,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:14,874 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-11-28 12:49:14,874 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:14,874 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:14,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:14,878 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:49:14,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:14,956 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:49:14,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 12:49:14,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 12:49:14,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:49:14,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:49:14,957 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-11-28 12:49:15,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:15,012 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-11-28 12:49:15,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 12:49:15,012 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-28 12:49:15,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:15,014 INFO L225 Difference]: With dead ends: 437 [2018-11-28 12:49:15,014 INFO L226 Difference]: Without dead ends: 309 [2018-11-28 12:49:15,014 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:49:15,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-11-28 12:49:15,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-11-28 12:49:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-11-28 12:49:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-11-28 12:49:15,026 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-11-28 12:49:15,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:15,026 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-11-28 12:49:15,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 12:49:15,026 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-11-28 12:49:15,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-28 12:49:15,027 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:15,027 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:15,027 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:15,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:15,028 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-11-28 12:49:15,028 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:15,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:15,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:15,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:49:15,031 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:15,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:15,113 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 12:49:15,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 12:49:15,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-28 12:49:15,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 12:49:15,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-28 12:49:15,114 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-11-28 12:49:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:15,195 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-11-28 12:49:15,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 12:49:15,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-28 12:49:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:15,197 INFO L225 Difference]: With dead ends: 456 [2018-11-28 12:49:15,198 INFO L226 Difference]: Without dead ends: 319 [2018-11-28 12:49:15,198 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:49:15,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-11-28 12:49:15,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-11-28 12:49:15,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-11-28 12:49:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-11-28 12:49:15,207 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-11-28 12:49:15,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:15,207 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-11-28 12:49:15,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-28 12:49:15,207 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-11-28 12:49:15,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 12:49:15,209 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:15,209 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:15,209 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:15,209 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:15,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-11-28 12:49:15,209 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:15,210 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:15,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:15,212 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:49:15,212 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:15,283 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:15,283 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:15,294 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:49:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:15,318 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:15,393 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:15,393 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 12:49:15,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:49:15,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:49:15,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:49:15,394 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2018-11-28 12:49:15,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:15,521 INFO L93 Difference]: Finished difference Result 466 states and 1115 transitions. [2018-11-28 12:49:15,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 12:49:15,521 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-28 12:49:15,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:15,523 INFO L225 Difference]: With dead ends: 466 [2018-11-28 12:49:15,523 INFO L226 Difference]: Without dead ends: 335 [2018-11-28 12:49:15,523 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:49:15,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2018-11-28 12:49:15,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2018-11-28 12:49:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2018-11-28 12:49:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 734 transitions. [2018-11-28 12:49:15,531 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 734 transitions. Word has length 29 [2018-11-28 12:49:15,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:15,531 INFO L480 AbstractCegarLoop]: Abstraction has 300 states and 734 transitions. [2018-11-28 12:49:15,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:49:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 734 transitions. [2018-11-28 12:49:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-28 12:49:15,533 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:15,533 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:15,533 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:15,533 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:15,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-11-28 12:49:15,534 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:15,534 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:15,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:15,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:49:15,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:15,595 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:15,596 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:15,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:49:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:15,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:15,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:15,680 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:15,680 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-11-28 12:49:15,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-28 12:49:15,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 12:49:15,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-11-28 12:49:15,681 INFO L87 Difference]: Start difference. First operand 300 states and 734 transitions. Second operand 8 states. [2018-11-28 12:49:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:15,769 INFO L93 Difference]: Finished difference Result 482 states and 1147 transitions. [2018-11-28 12:49:15,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-28 12:49:15,770 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-11-28 12:49:15,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:15,771 INFO L225 Difference]: With dead ends: 482 [2018-11-28 12:49:15,771 INFO L226 Difference]: Without dead ends: 351 [2018-11-28 12:49:15,772 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2018-11-28 12:49:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2018-11-28 12:49:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2018-11-28 12:49:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-11-28 12:49:15,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-11-28 12:49:15,781 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-11-28 12:49:15,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:15,781 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-11-28 12:49:15,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-28 12:49:15,781 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-11-28 12:49:15,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-28 12:49:15,782 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:15,783 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:15,784 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:15,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:15,784 INFO L82 PathProgramCache]: Analyzing trace with hash -460714038, now seen corresponding path program 1 times [2018-11-28 12:49:15,785 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:15,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:15,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:15,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:49:15,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:15,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:15,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:15,868 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:15,887 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:49:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:15,906 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:15,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:15,954 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 12:49:15,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 12:49:15,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 12:49:15,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-28 12:49:15,955 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 9 states. [2018-11-28 12:49:16,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:16,066 INFO L93 Difference]: Finished difference Result 498 states and 1179 transitions. [2018-11-28 12:49:16,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 12:49:16,067 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-28 12:49:16,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:16,069 INFO L225 Difference]: With dead ends: 498 [2018-11-28 12:49:16,069 INFO L226 Difference]: Without dead ends: 367 [2018-11-28 12:49:16,070 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:49:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2018-11-28 12:49:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 316. [2018-11-28 12:49:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2018-11-28 12:49:16,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 766 transitions. [2018-11-28 12:49:16,079 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 766 transitions. Word has length 33 [2018-11-28 12:49:16,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:16,079 INFO L480 AbstractCegarLoop]: Abstraction has 316 states and 766 transitions. [2018-11-28 12:49:16,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 12:49:16,080 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 766 transitions. [2018-11-28 12:49:16,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-11-28 12:49:16,080 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:16,080 INFO L402 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:16,081 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:16,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:16,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1110322378, now seen corresponding path program 2 times [2018-11-28 12:49:16,081 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:16,081 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:16,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:16,083 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:49:16,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:16,136 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:16,136 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:16,151 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:49:16,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:49:16,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:49:16,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:16,209 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:16,209 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-11-28 12:49:16,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-28 12:49:16,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-28 12:49:16,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-11-28 12:49:16,210 INFO L87 Difference]: Start difference. First operand 316 states and 766 transitions. Second operand 9 states. [2018-11-28 12:49:16,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:16,308 INFO L93 Difference]: Finished difference Result 514 states and 1211 transitions. [2018-11-28 12:49:16,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 12:49:16,309 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2018-11-28 12:49:16,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:16,310 INFO L225 Difference]: With dead ends: 514 [2018-11-28 12:49:16,310 INFO L226 Difference]: Without dead ends: 383 [2018-11-28 12:49:16,310 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:49:16,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-11-28 12:49:16,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 383. [2018-11-28 12:49:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-11-28 12:49:16,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 900 transitions. [2018-11-28 12:49:16,318 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 900 transitions. Word has length 33 [2018-11-28 12:49:16,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:16,318 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 900 transitions. [2018-11-28 12:49:16,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-28 12:49:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 900 transitions. [2018-11-28 12:49:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 12:49:16,319 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:16,319 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:16,320 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:16,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:16,320 INFO L82 PathProgramCache]: Analyzing trace with hash 2061178471, now seen corresponding path program 3 times [2018-11-28 12:49:16,320 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:16,320 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:16,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:16,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:49:16,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:16,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:16,380 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:16,393 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:49:16,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-28 12:49:16,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:49:16,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:16,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:16,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 12:49:16,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 12:49:16,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 12:49:16,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-28 12:49:16,446 INFO L87 Difference]: Start difference. First operand 383 states and 900 transitions. Second operand 10 states. [2018-11-28 12:49:16,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:16,522 INFO L93 Difference]: Finished difference Result 530 states and 1243 transitions. [2018-11-28 12:49:16,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 12:49:16,522 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-28 12:49:16,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:16,523 INFO L225 Difference]: With dead ends: 530 [2018-11-28 12:49:16,523 INFO L226 Difference]: Without dead ends: 399 [2018-11-28 12:49:16,523 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2018-11-28 12:49:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2018-11-28 12:49:16,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 332. [2018-11-28 12:49:16,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2018-11-28 12:49:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 798 transitions. [2018-11-28 12:49:16,527 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 798 transitions. Word has length 37 [2018-11-28 12:49:16,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:16,527 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 798 transitions. [2018-11-28 12:49:16,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 12:49:16,527 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 798 transitions. [2018-11-28 12:49:16,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-28 12:49:16,528 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:16,528 INFO L402 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:16,528 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:16,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:16,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1649592435, now seen corresponding path program 4 times [2018-11-28 12:49:16,528 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:16,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:16,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:16,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:49:16,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:16,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:16,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:16,617 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:16,625 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:49:16,641 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:49:16,641 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:49:16,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:16,686 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:16,686 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-11-28 12:49:16,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-11-28 12:49:16,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 12:49:16,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-11-28 12:49:16,687 INFO L87 Difference]: Start difference. First operand 332 states and 798 transitions. Second operand 10 states. [2018-11-28 12:49:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:16,751 INFO L93 Difference]: Finished difference Result 546 states and 1275 transitions. [2018-11-28 12:49:16,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-28 12:49:16,751 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-11-28 12:49:16,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:16,752 INFO L225 Difference]: With dead ends: 546 [2018-11-28 12:49:16,752 INFO L226 Difference]: Without dead ends: 415 [2018-11-28 12:49:16,753 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2018-11-28 12:49:16,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2018-11-28 12:49:16,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 415. [2018-11-28 12:49:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2018-11-28 12:49:16,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 964 transitions. [2018-11-28 12:49:16,759 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 964 transitions. Word has length 37 [2018-11-28 12:49:16,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:16,759 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 964 transitions. [2018-11-28 12:49:16,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-11-28 12:49:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 964 transitions. [2018-11-28 12:49:16,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 12:49:16,760 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:16,760 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:16,760 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:16,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:16,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2086800042, now seen corresponding path program 5 times [2018-11-28 12:49:16,761 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:16,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:16,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:16,764 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:49:16,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:16,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:16,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:16,820 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:16,828 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:49:16,839 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-11-28 12:49:16,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:49:16,840 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:16,866 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:16,866 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 12:49:16,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 12:49:16,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 12:49:16,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 12:49:16,867 INFO L87 Difference]: Start difference. First operand 415 states and 964 transitions. Second operand 11 states. [2018-11-28 12:49:16,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:16,976 INFO L93 Difference]: Finished difference Result 562 states and 1307 transitions. [2018-11-28 12:49:16,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 12:49:16,976 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-28 12:49:16,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:16,978 INFO L225 Difference]: With dead ends: 562 [2018-11-28 12:49:16,978 INFO L226 Difference]: Without dead ends: 431 [2018-11-28 12:49:16,978 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-11-28 12:49:16,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2018-11-28 12:49:16,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 348. [2018-11-28 12:49:16,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-11-28 12:49:16,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 830 transitions. [2018-11-28 12:49:16,984 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 830 transitions. Word has length 41 [2018-11-28 12:49:16,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:16,984 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 830 transitions. [2018-11-28 12:49:16,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 12:49:16,985 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 830 transitions. [2018-11-28 12:49:16,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-11-28 12:49:16,985 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:16,985 INFO L402 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:16,985 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:16,986 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:16,986 INFO L82 PathProgramCache]: Analyzing trace with hash 449750186, now seen corresponding path program 6 times [2018-11-28 12:49:16,986 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:16,986 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:16,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:16,987 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:49:16,987 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:17,052 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:17,052 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:17,071 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:49:17,088 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-11-28 12:49:17,088 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:49:17,091 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:17,146 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:17,146 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2018-11-28 12:49:17,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-28 12:49:17,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-28 12:49:17,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-11-28 12:49:17,146 INFO L87 Difference]: Start difference. First operand 348 states and 830 transitions. Second operand 11 states. [2018-11-28 12:49:17,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:17,222 INFO L93 Difference]: Finished difference Result 578 states and 1339 transitions. [2018-11-28 12:49:17,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 12:49:17,222 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2018-11-28 12:49:17,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:17,223 INFO L225 Difference]: With dead ends: 578 [2018-11-28 12:49:17,223 INFO L226 Difference]: Without dead ends: 447 [2018-11-28 12:49:17,223 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2018-11-28 12:49:17,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-11-28 12:49:17,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-11-28 12:49:17,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-11-28 12:49:17,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-11-28 12:49:17,230 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 41 [2018-11-28 12:49:17,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:17,230 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-11-28 12:49:17,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-28 12:49:17,230 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-11-28 12:49:17,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 12:49:17,231 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:17,231 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:17,231 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:17,231 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:17,231 INFO L82 PathProgramCache]: Analyzing trace with hash 511353159, now seen corresponding path program 7 times [2018-11-28 12:49:17,232 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:17,232 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:17,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:17,233 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:49:17,233 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:17,299 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:17,299 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:17,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:49:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:17,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:17,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:17,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 12:49:17,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 12:49:17,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 12:49:17,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:49:17,421 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 12 states. [2018-11-28 12:49:17,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:17,529 INFO L93 Difference]: Finished difference Result 594 states and 1371 transitions. [2018-11-28 12:49:17,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 12:49:17,530 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-28 12:49:17,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:17,531 INFO L225 Difference]: With dead ends: 594 [2018-11-28 12:49:17,531 INFO L226 Difference]: Without dead ends: 463 [2018-11-28 12:49:17,532 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2018-11-28 12:49:17,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2018-11-28 12:49:17,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 364. [2018-11-28 12:49:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364 states. [2018-11-28 12:49:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 862 transitions. [2018-11-28 12:49:17,536 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 862 transitions. Word has length 45 [2018-11-28 12:49:17,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:17,537 INFO L480 AbstractCegarLoop]: Abstraction has 364 states and 862 transitions. [2018-11-28 12:49:17,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 12:49:17,537 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 862 transitions. [2018-11-28 12:49:17,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-28 12:49:17,537 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:17,537 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:17,538 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:17,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:17,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1081163923, now seen corresponding path program 8 times [2018-11-28 12:49:17,538 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:17,538 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:17,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:17,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:49:17,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:17,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:17,588 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:17,612 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 12:49:17,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 12:49:17,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:49:17,628 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:17,659 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:17,674 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:17,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2018-11-28 12:49:17,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-28 12:49:17,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-28 12:49:17,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-11-28 12:49:17,675 INFO L87 Difference]: Start difference. First operand 364 states and 862 transitions. Second operand 12 states. [2018-11-28 12:49:17,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:17,776 INFO L93 Difference]: Finished difference Result 610 states and 1403 transitions. [2018-11-28 12:49:17,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-28 12:49:17,776 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2018-11-28 12:49:17,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:17,778 INFO L225 Difference]: With dead ends: 610 [2018-11-28 12:49:17,778 INFO L226 Difference]: Without dead ends: 479 [2018-11-28 12:49:17,778 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2018-11-28 12:49:17,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2018-11-28 12:49:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 479. [2018-11-28 12:49:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2018-11-28 12:49:17,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1092 transitions. [2018-11-28 12:49:17,784 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1092 transitions. Word has length 45 [2018-11-28 12:49:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:17,785 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1092 transitions. [2018-11-28 12:49:17,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-28 12:49:17,785 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1092 transitions. [2018-11-28 12:49:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 12:49:17,786 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:17,786 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:17,786 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:17,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash -578738806, now seen corresponding path program 9 times [2018-11-28 12:49:17,786 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:17,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:17,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:17,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:49:17,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:17,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:17,866 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:17,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-28 12:49:17,894 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-28 12:49:17,894 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:49:17,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:17,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:17,931 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:17,931 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-28 12:49:17,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 12:49:17,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 12:49:17,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-28 12:49:17,932 INFO L87 Difference]: Start difference. First operand 479 states and 1092 transitions. Second operand 13 states. [2018-11-28 12:49:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:18,053 INFO L93 Difference]: Finished difference Result 626 states and 1435 transitions. [2018-11-28 12:49:18,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 12:49:18,054 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-28 12:49:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:18,055 INFO L225 Difference]: With dead ends: 626 [2018-11-28 12:49:18,055 INFO L226 Difference]: Without dead ends: 495 [2018-11-28 12:49:18,056 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2018-11-28 12:49:18,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2018-11-28 12:49:18,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 380. [2018-11-28 12:49:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380 states. [2018-11-28 12:49:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 894 transitions. [2018-11-28 12:49:18,063 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 894 transitions. Word has length 49 [2018-11-28 12:49:18,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:18,063 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 894 transitions. [2018-11-28 12:49:18,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 12:49:18,063 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 894 transitions. [2018-11-28 12:49:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-28 12:49:18,064 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:18,064 INFO L402 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:18,064 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:18,064 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:18,064 INFO L82 PathProgramCache]: Analyzing trace with hash -555139958, now seen corresponding path program 10 times [2018-11-28 12:49:18,065 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:18,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:18,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:18,066 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:49:18,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:18,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:18,138 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:18,138 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:18,151 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-28 12:49:18,169 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-28 12:49:18,169 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:49:18,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:18,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:18,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-11-28 12:49:18,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-28 12:49:18,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-28 12:49:18,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2018-11-28 12:49:18,221 INFO L87 Difference]: Start difference. First operand 380 states and 894 transitions. Second operand 13 states. [2018-11-28 12:49:18,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:18,331 INFO L93 Difference]: Finished difference Result 642 states and 1467 transitions. [2018-11-28 12:49:18,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-28 12:49:18,331 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2018-11-28 12:49:18,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:18,332 INFO L225 Difference]: With dead ends: 642 [2018-11-28 12:49:18,332 INFO L226 Difference]: Without dead ends: 511 [2018-11-28 12:49:18,333 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2018-11-28 12:49:18,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2018-11-28 12:49:18,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2018-11-28 12:49:18,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2018-11-28 12:49:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1156 transitions. [2018-11-28 12:49:18,339 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1156 transitions. Word has length 49 [2018-11-28 12:49:18,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:18,339 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1156 transitions. [2018-11-28 12:49:18,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-28 12:49:18,339 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1156 transitions. [2018-11-28 12:49:18,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-28 12:49:18,340 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:18,340 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:18,340 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:18,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:18,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1389448231, now seen corresponding path program 11 times [2018-11-28 12:49:18,341 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:18,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:18,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:18,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:49:18,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:18,419 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:18,419 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:18,430 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-28 12:49:18,449 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-11-28 12:49:18,449 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:49:18,451 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:18,520 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:18,520 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-28 12:49:18,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 12:49:18,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 12:49:18,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:49:18,521 INFO L87 Difference]: Start difference. First operand 511 states and 1156 transitions. Second operand 14 states. [2018-11-28 12:49:18,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:18,648 INFO L93 Difference]: Finished difference Result 658 states and 1499 transitions. [2018-11-28 12:49:18,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 12:49:18,648 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-28 12:49:18,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:18,650 INFO L225 Difference]: With dead ends: 658 [2018-11-28 12:49:18,650 INFO L226 Difference]: Without dead ends: 527 [2018-11-28 12:49:18,650 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2018-11-28 12:49:18,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2018-11-28 12:49:18,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2018-11-28 12:49:18,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2018-11-28 12:49:18,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2018-11-28 12:49:18,658 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 53 [2018-11-28 12:49:18,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:18,658 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2018-11-28 12:49:18,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 12:49:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2018-11-28 12:49:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-11-28 12:49:18,659 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:18,659 INFO L402 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:18,659 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:18,659 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:18,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1121609549, now seen corresponding path program 12 times [2018-11-28 12:49:18,659 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:18,659 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:18,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:18,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:49:18,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:18,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:18,735 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:18,746 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-28 12:49:18,763 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-11-28 12:49:18,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 12:49:18,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:18,814 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:18,815 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2018-11-28 12:49:18,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-11-28 12:49:18,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-11-28 12:49:18,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-11-28 12:49:18,815 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2018-11-28 12:49:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:18,970 INFO L93 Difference]: Finished difference Result 674 states and 1531 transitions. [2018-11-28 12:49:18,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-28 12:49:18,970 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2018-11-28 12:49:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:18,972 INFO L225 Difference]: With dead ends: 674 [2018-11-28 12:49:18,972 INFO L226 Difference]: Without dead ends: 543 [2018-11-28 12:49:18,972 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2018-11-28 12:49:18,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2018-11-28 12:49:18,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2018-11-28 12:49:18,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2018-11-28 12:49:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1220 transitions. [2018-11-28 12:49:18,979 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1220 transitions. Word has length 53 [2018-11-28 12:49:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:18,979 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1220 transitions. [2018-11-28 12:49:18,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-11-28 12:49:18,980 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1220 transitions. [2018-11-28 12:49:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 12:49:18,980 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:18,981 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:18,981 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:18,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:18,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1590124650, now seen corresponding path program 13 times [2018-11-28 12:49:18,981 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:18,981 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:18,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:18,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 12:49:18,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:19,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 12:49:19,063 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 12:49:19,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:49:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 12:49:19,087 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 12:49:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 12:49:19,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 12:49:19,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2018-11-28 12:49:19,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-11-28 12:49:19,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-11-28 12:49:19,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2018-11-28 12:49:19,133 INFO L87 Difference]: Start difference. First operand 543 states and 1220 transitions. Second operand 15 states. [2018-11-28 12:49:19,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 12:49:19,270 INFO L93 Difference]: Finished difference Result 690 states and 1563 transitions. [2018-11-28 12:49:19,270 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-28 12:49:19,270 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2018-11-28 12:49:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-28 12:49:19,272 INFO L225 Difference]: With dead ends: 690 [2018-11-28 12:49:19,272 INFO L226 Difference]: Without dead ends: 559 [2018-11-28 12:49:19,273 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2018-11-28 12:49:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2018-11-28 12:49:19,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 412. [2018-11-28 12:49:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2018-11-28 12:49:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 958 transitions. [2018-11-28 12:49:19,279 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 958 transitions. Word has length 57 [2018-11-28 12:49:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-28 12:49:19,279 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 958 transitions. [2018-11-28 12:49:19,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-11-28 12:49:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 958 transitions. [2018-11-28 12:49:19,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-28 12:49:19,280 INFO L394 BasicCegarLoop]: Found error trace [2018-11-28 12:49:19,280 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 12:49:19,280 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-28 12:49:19,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 12:49:19,280 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 14 times [2018-11-28 12:49:19,280 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 12:49:19,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 12:49:19,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:19,282 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 12:49:19,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 12:49:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:49:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 12:49:19,317 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-11-28 12:49:19,361 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-11-28 12:49:19,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:49:19 BasicIcfg [2018-11-28 12:49:19,363 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-28 12:49:19,363 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 12:49:19,363 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 12:49:19,363 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 12:49:19,363 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:49:14" (3/4) ... [2018-11-28 12:49:19,365 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-11-28 12:49:19,420 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_4024337b-824f-4403-9c77-665b44b8a7d7/bin-2019/uautomizer/witness.graphml [2018-11-28 12:49:19,420 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 12:49:19,421 INFO L168 Benchmark]: Toolchain (without parser) took 5758.46 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 309.3 MB). Free memory was 956.0 MB in the beginning and 904.7 MB in the end (delta: 51.3 MB). Peak memory consumption was 360.6 MB. Max. memory is 11.5 GB. [2018-11-28 12:49:19,422 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 12:49:19,422 INFO L168 Benchmark]: CACSL2BoogieTranslator took 354.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 956.0 MB in the beginning and 1.1 GB in the end (delta: -155.0 MB). Peak memory consumption was 30.3 MB. Max. memory is 11.5 GB. [2018-11-28 12:49:19,422 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.52 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. [2018-11-28 12:49:19,423 INFO L168 Benchmark]: Boogie Preprocessor took 19.43 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. [2018-11-28 12:49:19,423 INFO L168 Benchmark]: RCFGBuilder took 223.33 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: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 11.5 GB. [2018-11-28 12:49:19,423 INFO L168 Benchmark]: TraceAbstraction took 5073.64 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 176.2 MB). Free memory was 1.1 GB in the beginning and 918.8 MB in the end (delta: 160.7 MB). Peak memory consumption was 336.8 MB. Max. memory is 11.5 GB. [2018-11-28 12:49:19,424 INFO L168 Benchmark]: Witness Printer took 57.50 ms. Allocated memory is still 1.3 GB. Free memory was 918.8 MB in the beginning and 904.7 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. [2018-11-28 12:49:19,425 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 354.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 956.0 MB in the beginning and 1.1 GB in the end (delta: -155.0 MB). Peak memory consumption was 30.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.52 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 19.43 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: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 223.33 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: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 11.5 GB. * TraceAbstraction took 5073.64 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 176.2 MB). Free memory was 1.1 GB in the beginning and 918.8 MB in the end (delta: 160.7 MB). Peak memory consumption was 336.8 MB. Max. memory is 11.5 GB. * Witness Printer took 57.50 ms. Allocated memory is still 1.3 GB. Free memory was 918.8 MB in the beginning and 904.7 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 688]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L660] -1 int i = 3, j = 6; VAL [i=3, j=6] [L678] -1 pthread_t id1, id2; VAL [i=3, j=6] [L679] FCALL, FORK -1 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L662] 0 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L680] FCALL, FORK -1 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L670] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L662] COND TRUE 0 k < 5 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L670] COND TRUE 1 k < 5 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L682] -1 int condI = i >= (2*5 +6); [L685] -1 int condJ = j >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L687] COND TRUE -1 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L688] -1 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. UNSAFE Result, 5.0s OverallTime, 20 OverallIterations, 5 TraceHistogramMax, 1.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1038 SDtfs, 3615 SDslu, 4258 SDs, 0 SdLazy, 854 SolverSat, 411 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 905 GetRequests, 639 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1012occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 738 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 1410 NumberOfCodeBlocks, 1410 NumberOfCodeBlocksAsserted, 56 NumberOfCheckSat, 1319 ConstructedInterpolants, 0 QuantifiedInterpolants, 167867 SizeOfPredicates, 139 NumberOfNonLiveVariables, 1682 ConjunctsInSsa, 187 ConjunctsInUnsatCore, 34 InterpolantComputations, 4 PerfectInterpolantSequences, 0/576 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...