./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-2.i -s /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 85b94be996486a7516ccc33e88e36127bb614ed5 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 09:00:05,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 09:00:05,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 09:00:05,276 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 09:00:05,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 09:00:05,278 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 09:00:05,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 09:00:05,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 09:00:05,285 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 09:00:05,287 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 09:00:05,290 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 09:00:05,291 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 09:00:05,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 09:00:05,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 09:00:05,298 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 09:00:05,299 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 09:00:05,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 09:00:05,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 09:00:05,301 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 09:00:05,303 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 09:00:05,307 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 09:00:05,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 09:00:05,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 09:00:05,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 09:00:05,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 09:00:05,320 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 09:00:05,321 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 09:00:05,322 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 09:00:05,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 09:00:05,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 09:00:05,323 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 09:00:05,324 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 09:00:05,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 09:00:05,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 09:00:05,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 09:00:05,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 09:00:05,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 09:00:05,327 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 09:00:05,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 09:00:05,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 09:00:05,331 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 09:00:05,332 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 09:00:05,357 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 09:00:05,357 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 09:00:05,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 09:00:05,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 09:00:05,359 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 09:00:05,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 09:00:05,360 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 09:00:05,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 09:00:05,360 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 09:00:05,360 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 09:00:05,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 09:00:05,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 09:00:05,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 09:00:05,361 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 09:00:05,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 09:00:05,362 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 09:00:05,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 09:00:05,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 09:00:05,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 09:00:05,362 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 09:00:05,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 09:00:05,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:00:05,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 09:00:05,363 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 09:00:05,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 09:00:05,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 09:00:05,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 09:00:05,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 09:00:05,365 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85b94be996486a7516ccc33e88e36127bb614ed5 [2019-10-22 09:00:05,407 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 09:00:05,419 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 09:00:05,423 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 09:00:05,427 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 09:00:05,427 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 09:00:05,427 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/../../sv-benchmarks/c/pthread/triangular-longer-2.i [2019-10-22 09:00:05,485 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/data/7af6753ac/43025cd1ac4f4272bc69a095b7b9381a/FLAG3c1b85c9e [2019-10-22 09:00:05,998 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 09:00:06,002 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/sv-benchmarks/c/pthread/triangular-longer-2.i [2019-10-22 09:00:06,014 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/data/7af6753ac/43025cd1ac4f4272bc69a095b7b9381a/FLAG3c1b85c9e [2019-10-22 09:00:06,454 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/data/7af6753ac/43025cd1ac4f4272bc69a095b7b9381a [2019-10-22 09:00:06,457 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 09:00:06,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 09:00:06,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:06,459 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 09:00:06,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 09:00:06,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:06" (1/1) ... [2019-10-22 09:00:06,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68eada55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:06, skipping insertion in model container [2019-10-22 09:00:06,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 09:00:06" (1/1) ... [2019-10-22 09:00:06,475 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 09:00:06,527 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 09:00:07,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:07,015 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 09:00:07,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 09:00:07,150 INFO L192 MainTranslator]: Completed translation [2019-10-22 09:00:07,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:07 WrapperNode [2019-10-22 09:00:07,152 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 09:00:07,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:07,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 09:00:07,153 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 09:00:07,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:07" (1/1) ... [2019-10-22 09:00:07,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:07" (1/1) ... [2019-10-22 09:00:07,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 09:00:07,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 09:00:07,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 09:00:07,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 09:00:07,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:07" (1/1) ... [2019-10-22 09:00:07,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:07" (1/1) ... [2019-10-22 09:00:07,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:07" (1/1) ... [2019-10-22 09:00:07,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:07" (1/1) ... [2019-10-22 09:00:07,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:07" (1/1) ... [2019-10-22 09:00:07,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:07" (1/1) ... [2019-10-22 09:00:07,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:07" (1/1) ... [2019-10-22 09:00:07,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 09:00:07,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 09:00:07,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 09:00:07,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 09:00:07,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:07" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 09:00:07,284 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2019-10-22 09:00:07,285 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2019-10-22 09:00:07,285 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2019-10-22 09:00:07,285 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2019-10-22 09:00:07,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-22 09:00:07,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2019-10-22 09:00:07,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-22 09:00:07,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-22 09:00:07,287 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2019-10-22 09:00:07,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 09:00:07,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 09:00:07,289 WARN L202 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2019-10-22 09:00:07,677 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 09:00:07,677 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-22 09:00:07,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:07 BoogieIcfgContainer [2019-10-22 09:00:07,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 09:00:07,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 09:00:07,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 09:00:07,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 09:00:07,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 09:00:06" (1/3) ... [2019-10-22 09:00:07,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d63e0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:00:07, skipping insertion in model container [2019-10-22 09:00:07,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 09:00:07" (2/3) ... [2019-10-22 09:00:07,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d63e0ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 09:00:07, skipping insertion in model container [2019-10-22 09:00:07,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:07" (3/3) ... [2019-10-22 09:00:07,696 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2019-10-22 09:00:07,736 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,737 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,737 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,737 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,738 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,738 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,738 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,738 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,739 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,739 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,739 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,739 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,740 WARN L315 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,740 WARN L315 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,741 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,741 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,741 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,741 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,741 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,742 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,742 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,742 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,742 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,743 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,743 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,743 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,743 WARN L315 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,744 WARN L315 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2019-10-22 09:00:07,762 WARN L141 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2019-10-22 09:00:07,762 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 09:00:07,773 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 09:00:07,782 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 09:00:07,802 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 09:00:07,803 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 09:00:07,803 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 09:00:07,803 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 09:00:07,803 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 09:00:07,803 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 09:00:07,803 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 09:00:07,804 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 09:00:07,813 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 48 transitions [2019-10-22 09:00:07,905 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2019-10-22 09:00:07,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2019-10-22 09:00:07,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-22 09:00:07,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:07,917 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:07,919 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:07,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1918718107, now seen corresponding path program 1 times [2019-10-22 09:00:07,934 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:07,935 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680351646] [2019-10-22 09:00:07,935 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:07,935 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:07,935 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:08,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680351646] [2019-10-22 09:00:08,275 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:08,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 09:00:08,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575359239] [2019-10-22 09:00:08,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:00:08,281 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:08,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:00:08,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:00:08,300 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2019-10-22 09:00:08,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:08,440 INFO L93 Difference]: Finished difference Result 1777 states and 5125 transitions. [2019-10-22 09:00:08,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:00:08,442 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2019-10-22 09:00:08,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:08,459 INFO L225 Difference]: With dead ends: 1777 [2019-10-22 09:00:08,459 INFO L226 Difference]: Without dead ends: 499 [2019-10-22 09:00:08,461 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:00:08,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2019-10-22 09:00:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 387. [2019-10-22 09:00:08,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2019-10-22 09:00:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 992 transitions. [2019-10-22 09:00:08,537 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 992 transitions. Word has length 19 [2019-10-22 09:00:08,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:08,538 INFO L462 AbstractCegarLoop]: Abstraction has 387 states and 992 transitions. [2019-10-22 09:00:08,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:00:08,538 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 992 transitions. [2019-10-22 09:00:08,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 09:00:08,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:08,540 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:08,540 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:08,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:08,540 INFO L82 PathProgramCache]: Analyzing trace with hash 146645817, now seen corresponding path program 1 times [2019-10-22 09:00:08,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:08,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985049862] [2019-10-22 09:00:08,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:08,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:08,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:08,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:08,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985049862] [2019-10-22 09:00:08,703 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:08,703 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 09:00:08,703 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55015420] [2019-10-22 09:00:08,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:00:08,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:08,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:00:08,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:00:08,706 INFO L87 Difference]: Start difference. First operand 387 states and 992 transitions. Second operand 5 states. [2019-10-22 09:00:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:08,830 INFO L93 Difference]: Finished difference Result 464 states and 1146 transitions. [2019-10-22 09:00:08,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:00:08,831 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-22 09:00:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:08,833 INFO L225 Difference]: With dead ends: 464 [2019-10-22 09:00:08,833 INFO L226 Difference]: Without dead ends: 343 [2019-10-22 09:00:08,834 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-22 09:00:08,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-22 09:00:08,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 319. [2019-10-22 09:00:08,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-10-22 09:00:08,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 814 transitions. [2019-10-22 09:00:08,870 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 814 transitions. Word has length 22 [2019-10-22 09:00:08,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:08,871 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 814 transitions. [2019-10-22 09:00:08,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:00:08,871 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 814 transitions. [2019-10-22 09:00:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-22 09:00:08,876 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:08,876 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:08,876 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:08,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:08,876 INFO L82 PathProgramCache]: Analyzing trace with hash -509840719, now seen corresponding path program 1 times [2019-10-22 09:00:08,876 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:08,877 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878260455] [2019-10-22 09:00:08,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:08,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:08,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:09,037 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878260455] [2019-10-22 09:00:09,037 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:09,037 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 09:00:09,037 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034238660] [2019-10-22 09:00:09,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 09:00:09,038 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:09,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 09:00:09,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-22 09:00:09,039 INFO L87 Difference]: Start difference. First operand 319 states and 814 transitions. Second operand 5 states. [2019-10-22 09:00:09,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:09,114 INFO L93 Difference]: Finished difference Result 420 states and 1016 transitions. [2019-10-22 09:00:09,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-22 09:00:09,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-22 09:00:09,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:09,116 INFO L225 Difference]: With dead ends: 420 [2019-10-22 09:00:09,116 INFO L226 Difference]: Without dead ends: 290 [2019-10-22 09:00:09,117 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:00:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2019-10-22 09:00:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2019-10-22 09:00:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2019-10-22 09:00:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2019-10-22 09:00:09,141 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2019-10-22 09:00:09,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:09,141 INFO L462 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2019-10-22 09:00:09,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 09:00:09,142 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2019-10-22 09:00:09,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 09:00:09,143 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:09,143 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:09,143 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:09,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:09,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1422570323, now seen corresponding path program 1 times [2019-10-22 09:00:09,144 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:09,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214988949] [2019-10-22 09:00:09,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:09,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:09,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:09,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214988949] [2019-10-22 09:00:09,252 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:09,252 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-22 09:00:09,252 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446592591] [2019-10-22 09:00:09,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:00:09,253 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:09,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:00:09,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:00:09,254 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2019-10-22 09:00:09,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:09,352 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2019-10-22 09:00:09,352 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-22 09:00:09,353 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-10-22 09:00:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:09,355 INFO L225 Difference]: With dead ends: 437 [2019-10-22 09:00:09,355 INFO L226 Difference]: Without dead ends: 300 [2019-10-22 09:00:09,355 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:00:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2019-10-22 09:00:09,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 287. [2019-10-22 09:00:09,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2019-10-22 09:00:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 708 transitions. [2019-10-22 09:00:09,370 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 708 transitions. Word has length 25 [2019-10-22 09:00:09,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:09,370 INFO L462 AbstractCegarLoop]: Abstraction has 287 states and 708 transitions. [2019-10-22 09:00:09,370 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:00:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 708 transitions. [2019-10-22 09:00:09,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-22 09:00:09,380 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:09,380 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:09,381 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:09,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:09,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1011235803, now seen corresponding path program 2 times [2019-10-22 09:00:09,381 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:09,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788500189] [2019-10-22 09:00:09,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:09,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:09,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:09,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788500189] [2019-10-22 09:00:09,523 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 09:00:09,523 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-22 09:00:09,523 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005152601] [2019-10-22 09:00:09,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 09:00:09,524 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:09,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 09:00:09,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-22 09:00:09,525 INFO L87 Difference]: Start difference. First operand 287 states and 708 transitions. Second operand 6 states. [2019-10-22 09:00:09,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:09,676 INFO L93 Difference]: Finished difference Result 447 states and 1077 transitions. [2019-10-22 09:00:09,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 09:00:09,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-10-22 09:00:09,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:09,680 INFO L225 Difference]: With dead ends: 447 [2019-10-22 09:00:09,680 INFO L226 Difference]: Without dead ends: 319 [2019-10-22 09:00:09,680 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:00:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-10-22 09:00:09,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2019-10-22 09:00:09,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-10-22 09:00:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2019-10-22 09:00:09,697 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2019-10-22 09:00:09,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:09,697 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2019-10-22 09:00:09,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 09:00:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2019-10-22 09:00:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-22 09:00:09,703 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:09,703 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:09,703 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:09,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:09,704 INFO L82 PathProgramCache]: Analyzing trace with hash -871830122, now seen corresponding path program 1 times [2019-10-22 09:00:09,704 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:09,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495478748] [2019-10-22 09:00:09,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:09,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:09,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:09,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:09,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495478748] [2019-10-22 09:00:09,833 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104327468] [2019-10-22 09:00:09,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:09,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 09:00:09,917 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:09,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:09,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:09,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:09,989 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:09,989 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-10-22 09:00:09,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489380256] [2019-10-22 09:00:09,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 09:00:09,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:09,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 09:00:09,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:00:09,992 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 8 states. [2019-10-22 09:00:10,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:10,136 INFO L93 Difference]: Finished difference Result 564 states and 1360 transitions. [2019-10-22 09:00:10,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-22 09:00:10,137 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2019-10-22 09:00:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:10,139 INFO L225 Difference]: With dead ends: 564 [2019-10-22 09:00:10,139 INFO L226 Difference]: Without dead ends: 375 [2019-10-22 09:00:10,140 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:00:10,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2019-10-22 09:00:10,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 337. [2019-10-22 09:00:10,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2019-10-22 09:00:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 808 transitions. [2019-10-22 09:00:10,153 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 808 transitions. Word has length 29 [2019-10-22 09:00:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:10,153 INFO L462 AbstractCegarLoop]: Abstraction has 337 states and 808 transitions. [2019-10-22 09:00:10,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 09:00:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 808 transitions. [2019-10-22 09:00:10,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-22 09:00:10,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:10,155 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:10,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:10,356 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:10,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:10,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1030341071, now seen corresponding path program 1 times [2019-10-22 09:00:10,356 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:10,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69639083] [2019-10-22 09:00:10,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:10,357 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:10,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:10,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:00:10,494 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69639083] [2019-10-22 09:00:10,494 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164784198] [2019-10-22 09:00:10,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:10,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-22 09:00:10,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:10,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:10,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:10,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:00:10,584 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:10,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-10-22 09:00:10,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337802291] [2019-10-22 09:00:10,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-22 09:00:10,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:10,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 09:00:10,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-22 09:00:10,586 INFO L87 Difference]: Start difference. First operand 337 states and 808 transitions. Second operand 8 states. [2019-10-22 09:00:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:10,728 INFO L93 Difference]: Finished difference Result 660 states and 1552 transitions. [2019-10-22 09:00:10,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-22 09:00:10,729 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2019-10-22 09:00:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:10,731 INFO L225 Difference]: With dead ends: 660 [2019-10-22 09:00:10,732 INFO L226 Difference]: Without dead ends: 459 [2019-10-22 09:00:10,732 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:00:10,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2019-10-22 09:00:10,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 391. [2019-10-22 09:00:10,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 391 states. [2019-10-22 09:00:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 916 transitions. [2019-10-22 09:00:10,748 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 916 transitions. Word has length 33 [2019-10-22 09:00:10,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:10,749 INFO L462 AbstractCegarLoop]: Abstraction has 391 states and 916 transitions. [2019-10-22 09:00:10,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-22 09:00:10,749 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 916 transitions. [2019-10-22 09:00:10,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-22 09:00:10,750 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:10,750 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:10,951 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:10,952 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:10,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:10,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1904071158, now seen corresponding path program 1 times [2019-10-22 09:00:10,952 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:10,952 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309018477] [2019-10-22 09:00:10,952 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:10,953 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:10,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:00:11,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309018477] [2019-10-22 09:00:11,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927479322] [2019-10-22 09:00:11,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:11,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 09:00:11,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:11,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:11,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:00:11,204 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:11,204 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-10-22 09:00:11,204 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887022485] [2019-10-22 09:00:11,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-22 09:00:11,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:11,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-22 09:00:11,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-22 09:00:11,207 INFO L87 Difference]: Start difference. First operand 391 states and 916 transitions. Second operand 9 states. [2019-10-22 09:00:11,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:11,362 INFO L93 Difference]: Finished difference Result 676 states and 1584 transitions. [2019-10-22 09:00:11,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 09:00:11,363 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-10-22 09:00:11,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:11,365 INFO L225 Difference]: With dead ends: 676 [2019-10-22 09:00:11,365 INFO L226 Difference]: Without dead ends: 475 [2019-10-22 09:00:11,366 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:00:11,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2019-10-22 09:00:11,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 353. [2019-10-22 09:00:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2019-10-22 09:00:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 840 transitions. [2019-10-22 09:00:11,379 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 840 transitions. Word has length 37 [2019-10-22 09:00:11,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:11,380 INFO L462 AbstractCegarLoop]: Abstraction has 353 states and 840 transitions. [2019-10-22 09:00:11,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-22 09:00:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 840 transitions. [2019-10-22 09:00:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-22 09:00:11,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:11,381 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:11,584 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:11,584 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:11,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:11,585 INFO L82 PathProgramCache]: Analyzing trace with hash 762173390, now seen corresponding path program 2 times [2019-10-22 09:00:11,585 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:11,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954083249] [2019-10-22 09:00:11,585 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:11,585 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:11,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:11,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954083249] [2019-10-22 09:00:11,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423939195] [2019-10-22 09:00:11,708 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:11,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:11,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:11,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-22 09:00:11,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:11,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:11,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:11,810 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:11,811 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-10-22 09:00:11,811 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131749262] [2019-10-22 09:00:11,811 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-22 09:00:11,813 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:11,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-22 09:00:11,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-10-22 09:00:11,814 INFO L87 Difference]: Start difference. First operand 353 states and 840 transitions. Second operand 10 states. [2019-10-22 09:00:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:12,000 INFO L93 Difference]: Finished difference Result 692 states and 1616 transitions. [2019-10-22 09:00:12,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-22 09:00:12,002 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2019-10-22 09:00:12,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:12,004 INFO L225 Difference]: With dead ends: 692 [2019-10-22 09:00:12,004 INFO L226 Difference]: Without dead ends: 455 [2019-10-22 09:00:12,004 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:00:12,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2019-10-22 09:00:12,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 427. [2019-10-22 09:00:12,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-10-22 09:00:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 992 transitions. [2019-10-22 09:00:12,017 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 992 transitions. Word has length 37 [2019-10-22 09:00:12,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:12,017 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 992 transitions. [2019-10-22 09:00:12,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-22 09:00:12,017 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 992 transitions. [2019-10-22 09:00:12,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-22 09:00:12,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:12,020 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:12,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:12,221 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:12,221 INFO L82 PathProgramCache]: Analyzing trace with hash 858521875, now seen corresponding path program 3 times [2019-10-22 09:00:12,221 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:12,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864616182] [2019-10-22 09:00:12,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:12,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:12,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:12,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:12,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864616182] [2019-10-22 09:00:12,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867766398] [2019-10-22 09:00:12,338 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:12,401 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-22 09:00:12,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:12,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 09:00:12,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:12,428 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:12,429 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:12,435 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:12,435 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-10-22 09:00:12,435 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396617047] [2019-10-22 09:00:12,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 09:00:12,436 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:12,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 09:00:12,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:00:12,436 INFO L87 Difference]: Start difference. First operand 427 states and 992 transitions. Second operand 11 states. [2019-10-22 09:00:12,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:12,661 INFO L93 Difference]: Finished difference Result 684 states and 1600 transitions. [2019-10-22 09:00:12,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-22 09:00:12,663 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2019-10-22 09:00:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:12,665 INFO L225 Difference]: With dead ends: 684 [2019-10-22 09:00:12,665 INFO L226 Difference]: Without dead ends: 447 [2019-10-22 09:00:12,665 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2019-10-22 09:00:12,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-22 09:00:12,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 345. [2019-10-22 09:00:12,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2019-10-22 09:00:12,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 824 transitions. [2019-10-22 09:00:12,678 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 824 transitions. Word has length 41 [2019-10-22 09:00:12,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:12,679 INFO L462 AbstractCegarLoop]: Abstraction has 345 states and 824 transitions. [2019-10-22 09:00:12,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 09:00:12,679 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 824 transitions. [2019-10-22 09:00:12,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-22 09:00:12,685 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:12,686 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:12,886 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:12,886 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:12,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:12,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1656791919, now seen corresponding path program 4 times [2019-10-22 09:00:12,887 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:12,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124678705] [2019-10-22 09:00:12,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:12,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:12,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:12,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124678705] [2019-10-22 09:00:12,997 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850784899] [2019-10-22 09:00:12,997 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:13,044 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:00:13,045 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:13,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-22 09:00:13,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:13,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:13,072 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:13,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:13,080 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:13,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-10-22 09:00:13,081 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475973179] [2019-10-22 09:00:13,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-22 09:00:13,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:13,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-22 09:00:13,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-22 09:00:13,082 INFO L87 Difference]: Start difference. First operand 345 states and 824 transitions. Second operand 11 states. [2019-10-22 09:00:13,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:13,254 INFO L93 Difference]: Finished difference Result 692 states and 1616 transitions. [2019-10-22 09:00:13,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 09:00:13,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2019-10-22 09:00:13,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:13,257 INFO L225 Difference]: With dead ends: 692 [2019-10-22 09:00:13,257 INFO L226 Difference]: Without dead ends: 503 [2019-10-22 09:00:13,257 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2019-10-22 09:00:13,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2019-10-22 09:00:13,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 475. [2019-10-22 09:00:13,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2019-10-22 09:00:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 1088 transitions. [2019-10-22 09:00:13,270 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 1088 transitions. Word has length 41 [2019-10-22 09:00:13,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:13,270 INFO L462 AbstractCegarLoop]: Abstraction has 475 states and 1088 transitions. [2019-10-22 09:00:13,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-22 09:00:13,270 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 1088 transitions. [2019-10-22 09:00:13,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-22 09:00:13,271 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:13,271 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:13,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:13,472 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:13,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:13,472 INFO L82 PathProgramCache]: Analyzing trace with hash -645047466, now seen corresponding path program 5 times [2019-10-22 09:00:13,472 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:13,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995400481] [2019-10-22 09:00:13,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:13,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:13,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:13,606 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:13,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995400481] [2019-10-22 09:00:13,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685968025] [2019-10-22 09:00:13,607 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:13,667 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-22 09:00:13,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:13,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-22 09:00:13,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:13,700 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:13,701 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:13,702 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:13,707 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:13,708 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-10-22 09:00:13,708 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680080631] [2019-10-22 09:00:13,708 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-22 09:00:13,709 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:13,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-22 09:00:13,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-22 09:00:13,709 INFO L87 Difference]: Start difference. First operand 475 states and 1088 transitions. Second operand 12 states. [2019-10-22 09:00:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:13,912 INFO L93 Difference]: Finished difference Result 732 states and 1696 transitions. [2019-10-22 09:00:13,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-22 09:00:13,913 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2019-10-22 09:00:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:13,915 INFO L225 Difference]: With dead ends: 732 [2019-10-22 09:00:13,915 INFO L226 Difference]: Without dead ends: 495 [2019-10-22 09:00:13,916 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2019-10-22 09:00:13,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2019-10-22 09:00:13,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 377. [2019-10-22 09:00:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2019-10-22 09:00:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 888 transitions. [2019-10-22 09:00:13,928 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 888 transitions. Word has length 45 [2019-10-22 09:00:13,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:13,928 INFO L462 AbstractCegarLoop]: Abstraction has 377 states and 888 transitions. [2019-10-22 09:00:13,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-22 09:00:13,928 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 888 transitions. [2019-10-22 09:00:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-22 09:00:13,929 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:13,929 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:14,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:14,130 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:14,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1356781681, now seen corresponding path program 6 times [2019-10-22 09:00:14,130 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:14,130 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145417159] [2019-10-22 09:00:14,130 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:14,131 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:14,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:14,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:14,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145417159] [2019-10-22 09:00:14,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032120017] [2019-10-22 09:00:14,264 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:14,322 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-22 09:00:14,322 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:14,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 09:00:14,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:14,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:14,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:14,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:14,357 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:14,357 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:14,357 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-10-22 09:00:14,357 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825377135] [2019-10-22 09:00:14,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-22 09:00:14,358 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:14,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-22 09:00:14,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-22 09:00:14,358 INFO L87 Difference]: Start difference. First operand 377 states and 888 transitions. Second operand 13 states. [2019-10-22 09:00:14,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:14,568 INFO L93 Difference]: Finished difference Result 740 states and 1712 transitions. [2019-10-22 09:00:14,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 09:00:14,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2019-10-22 09:00:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:14,571 INFO L225 Difference]: With dead ends: 740 [2019-10-22 09:00:14,571 INFO L226 Difference]: Without dead ends: 527 [2019-10-22 09:00:14,571 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2019-10-22 09:00:14,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2019-10-22 09:00:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 396. [2019-10-22 09:00:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 396 states. [2019-10-22 09:00:14,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 926 transitions. [2019-10-22 09:00:14,582 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 926 transitions. Word has length 49 [2019-10-22 09:00:14,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:14,582 INFO L462 AbstractCegarLoop]: Abstraction has 396 states and 926 transitions. [2019-10-22 09:00:14,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-22 09:00:14,582 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 926 transitions. [2019-10-22 09:00:14,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-22 09:00:14,583 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:14,583 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:14,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:14,784 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash -285720010, now seen corresponding path program 7 times [2019-10-22 09:00:14,785 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:14,785 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996631561] [2019-10-22 09:00:14,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:14,785 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:14,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:14,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996631561] [2019-10-22 09:00:14,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093642225] [2019-10-22 09:00:14,938 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:15,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-22 09:00:15,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:15,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:15,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:15,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:15,050 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:15,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-10-22 09:00:15,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583539468] [2019-10-22 09:00:15,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-22 09:00:15,051 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:15,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-22 09:00:15,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-10-22 09:00:15,052 INFO L87 Difference]: Start difference. First operand 396 states and 926 transitions. Second operand 14 states. [2019-10-22 09:00:15,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:15,333 INFO L93 Difference]: Finished difference Result 800 states and 1832 transitions. [2019-10-22 09:00:15,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-22 09:00:15,333 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2019-10-22 09:00:15,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:15,336 INFO L225 Difference]: With dead ends: 800 [2019-10-22 09:00:15,336 INFO L226 Difference]: Without dead ends: 611 [2019-10-22 09:00:15,337 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2019-10-22 09:00:15,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2019-10-22 09:00:15,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 571. [2019-10-22 09:00:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2019-10-22 09:00:15,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1280 transitions. [2019-10-22 09:00:15,352 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1280 transitions. Word has length 53 [2019-10-22 09:00:15,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:15,352 INFO L462 AbstractCegarLoop]: Abstraction has 571 states and 1280 transitions. [2019-10-22 09:00:15,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-22 09:00:15,352 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1280 transitions. [2019-10-22 09:00:15,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-22 09:00:15,353 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:15,353 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:15,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:15,554 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:15,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:15,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1833667503, now seen corresponding path program 8 times [2019-10-22 09:00:15,555 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:15,555 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201537678] [2019-10-22 09:00:15,555 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:15,555 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:15,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:15,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201537678] [2019-10-22 09:00:15,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146452683] [2019-10-22 09:00:15,717 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:15,780 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:15,780 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:15,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-22 09:00:15,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:15,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:15,819 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:15,820 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:15,823 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:15,823 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-10-22 09:00:15,823 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937291373] [2019-10-22 09:00:15,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 09:00:15,823 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:15,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 09:00:15,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:00:15,824 INFO L87 Difference]: Start difference. First operand 571 states and 1280 transitions. Second operand 15 states. [2019-10-22 09:00:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:16,103 INFO L93 Difference]: Finished difference Result 828 states and 1888 transitions. [2019-10-22 09:00:16,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 09:00:16,104 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2019-10-22 09:00:16,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:16,106 INFO L225 Difference]: With dead ends: 828 [2019-10-22 09:00:16,106 INFO L226 Difference]: Without dead ends: 615 [2019-10-22 09:00:16,107 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2019-10-22 09:00:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2019-10-22 09:00:16,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 603. [2019-10-22 09:00:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-22 09:00:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1344 transitions. [2019-10-22 09:00:16,123 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1344 transitions. Word has length 57 [2019-10-22 09:00:16,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:16,123 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1344 transitions. [2019-10-22 09:00:16,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 09:00:16,124 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1344 transitions. [2019-10-22 09:00:16,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-22 09:00:16,125 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:16,125 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:16,325 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:16,326 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:16,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:16,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1419675286, now seen corresponding path program 9 times [2019-10-22 09:00:16,327 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:16,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893353212] [2019-10-22 09:00:16,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:16,327 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:16,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:00:16,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893353212] [2019-10-22 09:00:16,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690168225] [2019-10-22 09:00:16,480 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:16,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-22 09:00:16,548 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:16,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-22 09:00:16,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:16,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:16,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:00:16,583 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:16,583 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-10-22 09:00:16,583 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305792208] [2019-10-22 09:00:16,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-22 09:00:16,583 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:16,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-22 09:00:16,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-10-22 09:00:16,584 INFO L87 Difference]: Start difference. First operand 603 states and 1344 transitions. Second operand 15 states. [2019-10-22 09:00:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:16,885 INFO L93 Difference]: Finished difference Result 876 states and 1984 transitions. [2019-10-22 09:00:16,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-22 09:00:16,885 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2019-10-22 09:00:16,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:16,888 INFO L225 Difference]: With dead ends: 876 [2019-10-22 09:00:16,888 INFO L226 Difference]: Without dead ends: 675 [2019-10-22 09:00:16,889 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2019-10-22 09:00:16,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2019-10-22 09:00:16,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 619. [2019-10-22 09:00:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-10-22 09:00:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1376 transitions. [2019-10-22 09:00:16,904 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1376 transitions. Word has length 61 [2019-10-22 09:00:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:16,904 INFO L462 AbstractCegarLoop]: Abstraction has 619 states and 1376 transitions. [2019-10-22 09:00:16,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-22 09:00:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1376 transitions. [2019-10-22 09:00:16,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-22 09:00:16,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:16,905 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:17,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:17,106 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:17,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:17,106 INFO L82 PathProgramCache]: Analyzing trace with hash 2007066035, now seen corresponding path program 10 times [2019-10-22 09:00:17,106 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:17,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861670109] [2019-10-22 09:00:17,106 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:17,107 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:17,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:17,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861670109] [2019-10-22 09:00:17,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104041151] [2019-10-22 09:00:17,278 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:17,343 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:00:17,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:17,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-22 09:00:17,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:17,369 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:17,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:17,376 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:17,376 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-10-22 09:00:17,376 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693759231] [2019-10-22 09:00:17,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-22 09:00:17,377 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:17,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-22 09:00:17,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-22 09:00:17,377 INFO L87 Difference]: Start difference. First operand 619 states and 1376 transitions. Second operand 17 states. [2019-10-22 09:00:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:17,759 INFO L93 Difference]: Finished difference Result 974 states and 2229 transitions. [2019-10-22 09:00:17,759 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-22 09:00:17,759 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2019-10-22 09:00:17,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:17,762 INFO L225 Difference]: With dead ends: 974 [2019-10-22 09:00:17,762 INFO L226 Difference]: Without dead ends: 679 [2019-10-22 09:00:17,762 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2019-10-22 09:00:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-10-22 09:00:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 481. [2019-10-22 09:00:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2019-10-22 09:00:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1096 transitions. [2019-10-22 09:00:17,774 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1096 transitions. Word has length 65 [2019-10-22 09:00:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:17,775 INFO L462 AbstractCegarLoop]: Abstraction has 481 states and 1096 transitions. [2019-10-22 09:00:17,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-22 09:00:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1096 transitions. [2019-10-22 09:00:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-22 09:00:17,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:17,776 INFO L380 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:17,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:17,977 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash 544491342, now seen corresponding path program 11 times [2019-10-22 09:00:17,977 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:17,978 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677514866] [2019-10-22 09:00:17,978 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:17,978 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:17,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:18,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677514866] [2019-10-22 09:00:18,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114215816] [2019-10-22 09:00:18,151 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:18,220 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-22 09:00:18,220 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:18,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-22 09:00:18,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:18,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:18,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:18,250 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:18,250 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:18,250 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-10-22 09:00:18,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985550989] [2019-10-22 09:00:18,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-22 09:00:18,251 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:18,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-22 09:00:18,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2019-10-22 09:00:18,251 INFO L87 Difference]: Start difference. First operand 481 states and 1096 transitions. Second operand 18 states. [2019-10-22 09:00:18,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:18,573 INFO L93 Difference]: Finished difference Result 1062 states and 2405 transitions. [2019-10-22 09:00:18,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-22 09:00:18,576 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2019-10-22 09:00:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:18,579 INFO L225 Difference]: With dead ends: 1062 [2019-10-22 09:00:18,579 INFO L226 Difference]: Without dead ends: 767 [2019-10-22 09:00:18,579 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=312, Invalid=810, Unknown=0, NotChecked=0, Total=1122 [2019-10-22 09:00:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2019-10-22 09:00:18,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 500. [2019-10-22 09:00:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2019-10-22 09:00:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1134 transitions. [2019-10-22 09:00:18,593 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1134 transitions. Word has length 69 [2019-10-22 09:00:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:18,593 INFO L462 AbstractCegarLoop]: Abstraction has 500 states and 1134 transitions. [2019-10-22 09:00:18,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-22 09:00:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1134 transitions. [2019-10-22 09:00:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-22 09:00:18,594 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:18,594 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:18,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:18,795 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:18,795 INFO L82 PathProgramCache]: Analyzing trace with hash 645143699, now seen corresponding path program 12 times [2019-10-22 09:00:18,795 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:18,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507995443] [2019-10-22 09:00:18,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:18,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:18,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:18,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507995443] [2019-10-22 09:00:18,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242534771] [2019-10-22 09:00:18,960 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:19,010 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-22 09:00:19,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:19,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-22 09:00:19,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:19,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:19,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:19,058 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:19,059 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:19,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-10-22 09:00:19,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880905266] [2019-10-22 09:00:19,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-22 09:00:19,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:19,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-22 09:00:19,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-10-22 09:00:19,060 INFO L87 Difference]: Start difference. First operand 500 states and 1134 transitions. Second operand 19 states. [2019-10-22 09:00:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:19,433 INFO L93 Difference]: Finished difference Result 1078 states and 2437 transitions. [2019-10-22 09:00:19,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-22 09:00:19,434 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2019-10-22 09:00:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:19,437 INFO L225 Difference]: With dead ends: 1078 [2019-10-22 09:00:19,437 INFO L226 Difference]: Without dead ends: 783 [2019-10-22 09:00:19,438 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=908, Unknown=0, NotChecked=0, Total=1260 [2019-10-22 09:00:19,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2019-10-22 09:00:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 513. [2019-10-22 09:00:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2019-10-22 09:00:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1160 transitions. [2019-10-22 09:00:19,452 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1160 transitions. Word has length 73 [2019-10-22 09:00:19,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:19,453 INFO L462 AbstractCegarLoop]: Abstraction has 513 states and 1160 transitions. [2019-10-22 09:00:19,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-22 09:00:19,453 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1160 transitions. [2019-10-22 09:00:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-22 09:00:19,454 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:19,454 INFO L380 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:19,654 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:19,655 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:19,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:19,655 INFO L82 PathProgramCache]: Analyzing trace with hash -934989010, now seen corresponding path program 13 times [2019-10-22 09:00:19,655 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:19,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770540515] [2019-10-22 09:00:19,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:19,656 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:19,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:19,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770540515] [2019-10-22 09:00:19,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675993058] [2019-10-22 09:00:19,917 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:19,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-22 09:00:19,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:20,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:20,017 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:20,029 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:20,029 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-10-22 09:00:20,029 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113115106] [2019-10-22 09:00:20,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-22 09:00:20,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:20,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-22 09:00:20,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-10-22 09:00:20,031 INFO L87 Difference]: Start difference. First operand 513 states and 1160 transitions. Second operand 20 states. [2019-10-22 09:00:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:20,441 INFO L93 Difference]: Finished difference Result 1012 states and 2256 transitions. [2019-10-22 09:00:20,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-22 09:00:20,442 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2019-10-22 09:00:20,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:20,444 INFO L225 Difference]: With dead ends: 1012 [2019-10-22 09:00:20,444 INFO L226 Difference]: Without dead ends: 775 [2019-10-22 09:00:20,445 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=388, Invalid=944, Unknown=0, NotChecked=0, Total=1332 [2019-10-22 09:00:20,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2019-10-22 09:00:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 747. [2019-10-22 09:00:20,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 747 states. [2019-10-22 09:00:20,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1632 transitions. [2019-10-22 09:00:20,458 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1632 transitions. Word has length 77 [2019-10-22 09:00:20,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:20,459 INFO L462 AbstractCegarLoop]: Abstraction has 747 states and 1632 transitions. [2019-10-22 09:00:20,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-22 09:00:20,459 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1632 transitions. [2019-10-22 09:00:20,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-22 09:00:20,460 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:20,460 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:20,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:20,661 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:20,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:20,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1175581555, now seen corresponding path program 14 times [2019-10-22 09:00:20,661 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:20,662 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360248096] [2019-10-22 09:00:20,662 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:20,662 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:20,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:20,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360248096] [2019-10-22 09:00:20,857 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475036116] [2019-10-22 09:00:20,857 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:20,916 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 09:00:20,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:20,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-22 09:00:20,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:20,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:20,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:20,956 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:20,956 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-10-22 09:00:20,956 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028967042] [2019-10-22 09:00:20,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-22 09:00:20,957 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:20,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-22 09:00:20,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:00:20,957 INFO L87 Difference]: Start difference. First operand 747 states and 1632 transitions. Second operand 21 states. [2019-10-22 09:00:21,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:21,365 INFO L93 Difference]: Finished difference Result 1004 states and 2240 transitions. [2019-10-22 09:00:21,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-22 09:00:21,366 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2019-10-22 09:00:21,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:21,367 INFO L225 Difference]: With dead ends: 1004 [2019-10-22 09:00:21,367 INFO L226 Difference]: Without dead ends: 767 [2019-10-22 09:00:21,368 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=433, Invalid=1049, Unknown=0, NotChecked=0, Total=1482 [2019-10-22 09:00:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2019-10-22 09:00:21,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 505. [2019-10-22 09:00:21,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2019-10-22 09:00:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1144 transitions. [2019-10-22 09:00:21,379 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1144 transitions. Word has length 81 [2019-10-22 09:00:21,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:21,380 INFO L462 AbstractCegarLoop]: Abstraction has 505 states and 1144 transitions. [2019-10-22 09:00:21,380 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-22 09:00:21,380 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1144 transitions. [2019-10-22 09:00:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-22 09:00:21,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:21,381 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:21,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:21,582 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:21,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:21,582 INFO L82 PathProgramCache]: Analyzing trace with hash -63305743, now seen corresponding path program 15 times [2019-10-22 09:00:21,582 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:21,582 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822637961] [2019-10-22 09:00:21,582 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:21,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:21,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:21,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822637961] [2019-10-22 09:00:21,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386418436] [2019-10-22 09:00:21,808 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:21,904 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-22 09:00:21,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:21,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-22 09:00:21,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:21,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:21,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:21,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:21,967 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:21,970 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:21,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-10-22 09:00:21,970 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872044742] [2019-10-22 09:00:21,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-22 09:00:21,971 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:21,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-22 09:00:21,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2019-10-22 09:00:21,971 INFO L87 Difference]: Start difference. First operand 505 states and 1144 transitions. Second operand 21 states. [2019-10-22 09:00:22,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:22,349 INFO L93 Difference]: Finished difference Result 1012 states and 2256 transitions. [2019-10-22 09:00:22,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-22 09:00:22,349 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2019-10-22 09:00:22,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:22,351 INFO L225 Difference]: With dead ends: 1012 [2019-10-22 09:00:22,351 INFO L226 Difference]: Without dead ends: 823 [2019-10-22 09:00:22,352 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2019-10-22 09:00:22,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2019-10-22 09:00:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 795. [2019-10-22 09:00:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2019-10-22 09:00:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1728 transitions. [2019-10-22 09:00:22,365 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1728 transitions. Word has length 81 [2019-10-22 09:00:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:22,365 INFO L462 AbstractCegarLoop]: Abstraction has 795 states and 1728 transitions. [2019-10-22 09:00:22,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-22 09:00:22,366 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1728 transitions. [2019-10-22 09:00:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-22 09:00:22,367 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:22,367 INFO L380 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:22,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:22,568 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:22,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1232281014, now seen corresponding path program 16 times [2019-10-22 09:00:22,568 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:22,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331554904] [2019-10-22 09:00:22,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:22,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:22,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:22,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331554904] [2019-10-22 09:00:22,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275759038] [2019-10-22 09:00:22,827 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:22,888 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-22 09:00:22,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:22,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-22 09:00:22,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:22,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:22,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:22,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:22,931 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:22,931 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-10-22 09:00:22,931 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886976682] [2019-10-22 09:00:22,931 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-22 09:00:22,931 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:22,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-22 09:00:22,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2019-10-22 09:00:22,932 INFO L87 Difference]: Start difference. First operand 795 states and 1728 transitions. Second operand 22 states. [2019-10-22 09:00:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:23,300 INFO L93 Difference]: Finished difference Result 1052 states and 2336 transitions. [2019-10-22 09:00:23,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-22 09:00:23,300 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2019-10-22 09:00:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:23,302 INFO L225 Difference]: With dead ends: 1052 [2019-10-22 09:00:23,302 INFO L226 Difference]: Without dead ends: 863 [2019-10-22 09:00:23,303 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=454, Invalid=1106, Unknown=0, NotChecked=0, Total=1560 [2019-10-22 09:00:23,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2019-10-22 09:00:23,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 561. [2019-10-22 09:00:23,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 561 states. [2019-10-22 09:00:23,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1256 transitions. [2019-10-22 09:00:23,313 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1256 transitions. Word has length 85 [2019-10-22 09:00:23,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:23,314 INFO L462 AbstractCegarLoop]: Abstraction has 561 states and 1256 transitions. [2019-10-22 09:00:23,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-22 09:00:23,314 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1256 transitions. [2019-10-22 09:00:23,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-22 09:00:23,315 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:23,315 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:23,515 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:23,516 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:23,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:23,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2008522415, now seen corresponding path program 17 times [2019-10-22 09:00:23,516 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:23,516 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586669479] [2019-10-22 09:00:23,516 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:23,516 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:23,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:00:23,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586669479] [2019-10-22 09:00:23,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999833206] [2019-10-22 09:00:23,761 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:23,823 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-22 09:00:23,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:23,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-22 09:00:23,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:23,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:23,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:23,865 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:00:23,866 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:23,866 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-10-22 09:00:23,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781661457] [2019-10-22 09:00:23,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-22 09:00:23,866 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:23,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-22 09:00:23,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2019-10-22 09:00:23,867 INFO L87 Difference]: Start difference. First operand 561 states and 1256 transitions. Second operand 22 states. [2019-10-22 09:00:24,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:24,357 INFO L93 Difference]: Finished difference Result 1010 states and 2203 transitions. [2019-10-22 09:00:24,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-22 09:00:24,357 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 89 [2019-10-22 09:00:24,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:24,359 INFO L225 Difference]: With dead ends: 1010 [2019-10-22 09:00:24,359 INFO L226 Difference]: Without dead ends: 867 [2019-10-22 09:00:24,359 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=470, Invalid=1090, Unknown=0, NotChecked=0, Total=1560 [2019-10-22 09:00:24,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2019-10-22 09:00:24,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 827. [2019-10-22 09:00:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2019-10-22 09:00:24,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1792 transitions. [2019-10-22 09:00:24,371 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1792 transitions. Word has length 89 [2019-10-22 09:00:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:24,371 INFO L462 AbstractCegarLoop]: Abstraction has 827 states and 1792 transitions. [2019-10-22 09:00:24,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-22 09:00:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1792 transitions. [2019-10-22 09:00:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-22 09:00:24,373 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:24,373 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:24,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:24,574 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:24,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:24,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1705518033, now seen corresponding path program 18 times [2019-10-22 09:00:24,574 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:24,574 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427796292] [2019-10-22 09:00:24,574 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:24,574 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:24,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:24,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427796292] [2019-10-22 09:00:24,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27170563] [2019-10-22 09:00:24,835 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:24,905 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-22 09:00:24,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 09:00:24,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-22 09:00:24,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:24,935 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:24,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:24,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 09:00:24,941 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:24,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-10-22 09:00:24,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678602824] [2019-10-22 09:00:24,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-22 09:00:24,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:24,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-22 09:00:24,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2019-10-22 09:00:24,942 INFO L87 Difference]: Start difference. First operand 827 states and 1792 transitions. Second operand 23 states. [2019-10-22 09:00:25,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:25,445 INFO L93 Difference]: Finished difference Result 1084 states and 2400 transitions. [2019-10-22 09:00:25,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-22 09:00:25,445 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2019-10-22 09:00:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:25,448 INFO L225 Difference]: With dead ends: 1084 [2019-10-22 09:00:25,448 INFO L226 Difference]: Without dead ends: 871 [2019-10-22 09:00:25,449 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=486, Invalid=1320, Unknown=0, NotChecked=0, Total=1806 [2019-10-22 09:00:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2019-10-22 09:00:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 859. [2019-10-22 09:00:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 859 states. [2019-10-22 09:00:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1856 transitions. [2019-10-22 09:00:25,461 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1856 transitions. Word has length 89 [2019-10-22 09:00:25,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:25,461 INFO L462 AbstractCegarLoop]: Abstraction has 859 states and 1856 transitions. [2019-10-22 09:00:25,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-22 09:00:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1856 transitions. [2019-10-22 09:00:25,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-22 09:00:25,463 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:25,463 INFO L380 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:25,664 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:25,664 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:25,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:25,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1111876118, now seen corresponding path program 19 times [2019-10-22 09:00:25,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:25,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709371044] [2019-10-22 09:00:25,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:25,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:25,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:00:25,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709371044] [2019-10-22 09:00:25,940 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517630078] [2019-10-22 09:00:25,940 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 09:00:26,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-22 09:00:26,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 09:00:26,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:26,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 09:00:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-22 09:00:26,053 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 09:00:26,053 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-10-22 09:00:26,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205770528] [2019-10-22 09:00:26,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-22 09:00:26,054 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 09:00:26,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-22 09:00:26,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2019-10-22 09:00:26,055 INFO L87 Difference]: Start difference. First operand 859 states and 1856 transitions. Second operand 23 states. [2019-10-22 09:00:26,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 09:00:26,538 INFO L93 Difference]: Finished difference Result 1132 states and 2496 transitions. [2019-10-22 09:00:26,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-22 09:00:26,538 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 93 [2019-10-22 09:00:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 09:00:26,542 INFO L225 Difference]: With dead ends: 1132 [2019-10-22 09:00:26,542 INFO L226 Difference]: Without dead ends: 931 [2019-10-22 09:00:26,542 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=524, Invalid=1282, Unknown=0, NotChecked=0, Total=1806 [2019-10-22 09:00:26,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2019-10-22 09:00:26,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 875. [2019-10-22 09:00:26,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 875 states. [2019-10-22 09:00:26,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1888 transitions. [2019-10-22 09:00:26,556 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1888 transitions. Word has length 93 [2019-10-22 09:00:26,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 09:00:26,556 INFO L462 AbstractCegarLoop]: Abstraction has 875 states and 1888 transitions. [2019-10-22 09:00:26,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-22 09:00:26,556 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1888 transitions. [2019-10-22 09:00:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-22 09:00:26,557 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 09:00:26,558 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 09:00:26,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 09:00:26,758 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 09:00:26,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 09:00:26,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1127153971, now seen corresponding path program 20 times [2019-10-22 09:00:26,759 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 09:00:26,759 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649637983] [2019-10-22 09:00:26,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:26,759 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 09:00:26,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 09:00:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 09:00:26,863 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 09:00:26,863 INFO L445 BasicCegarLoop]: Counterexample might be feasible [2019-10-22 09:00:26,975 INFO L303 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2019-10-22 09:00:26,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 09:00:26 BasicIcfg [2019-10-22 09:00:26,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 09:00:26,977 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 09:00:26,978 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 09:00:26,978 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 09:00:26,978 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 09:00:07" (3/4) ... [2019-10-22 09:00:26,985 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-10-22 09:00:27,076 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_e5b6ed64-5b06-4b84-bc71-a16cea0d46a6/bin/uautomizer/witness.graphml [2019-10-22 09:00:27,076 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 09:00:27,080 INFO L168 Benchmark]: Toolchain (without parser) took 20619.89 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 356.5 MB). Free memory was 939.3 MB in the beginning and 1.3 GB in the end (delta: -407.0 MB). Peak memory consumption was 412.1 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:27,080 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 09:00:27,081 INFO L168 Benchmark]: CACSL2BoogieTranslator took 693.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -162.0 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:27,081 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.18 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:27,081 INFO L168 Benchmark]: Boogie Preprocessor took 23.17 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:27,081 INFO L168 Benchmark]: RCFGBuilder took 463.67 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: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:27,082 INFO L168 Benchmark]: TraceAbstraction took 19297.11 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 179.8 MB). Free memory was 1.1 GB in the beginning and 848.9 MB in the end (delta: 224.3 MB). Peak memory consumption was 404.1 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:27,082 INFO L168 Benchmark]: Witness Printer took 98.95 ms. Allocated memory was 1.3 GB in the beginning and 1.4 GB in the end (delta: 47.2 MB). Free memory was 848.9 MB in the beginning and 1.3 GB in the end (delta: -497.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. [2019-10-22 09:00:27,085 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 693.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -162.0 MB). Peak memory consumption was 22.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 39.18 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.17 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: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 463.67 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: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 19297.11 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 179.8 MB). Free memory was 1.1 GB in the beginning and 848.9 MB in the end (delta: 224.3 MB). Peak memory consumption was 404.1 MB. Max. memory is 11.5 GB. * Witness Printer took 98.95 ms. Allocated memory was 1.3 GB in the beginning and 1.4 GB in the end (delta: 47.2 MB). Free memory was 848.9 MB in the beginning and 1.3 GB in the end (delta: -497.3 MB). Peak memory consumption was 12.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; VAL [i=3, j=6] [L693] 0 pthread_t id1, id2; VAL [i=3, j=6] [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=5] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=6] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=7] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=8] [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8] [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L697] 0 int condI = i >= (2*10 +6); [L700] 0 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L702] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. Result: UNSAFE, OverallTime: 19.1s, OverallIterations: 27, TraceHistogramMax: 10, AutomataDifference: 7.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 1477 SDtfs, 7185 SDslu, 9329 SDs, 0 SdLazy, 1938 SolverSat, 997 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1881 GetRequests, 1295 SyntacticMatches, 0 SemanticMatches, 586 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3070 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1012occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 26 MinimizatonAttempts, 2355 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 2780 NumberOfCodeBlocks, 2780 NumberOfCodeBlocksAsserted, 102 NumberOfCheckSat, 2636 ConstructedInterpolants, 0 QuantifiedInterpolants, 521732 SizeOfPredicates, 290 NumberOfNonLiveVariables, 3200 ConjunctsInSsa, 357 ConjunctsInUnsatCore, 47 InterpolantComputations, 5 PerfectInterpolantSequences, 10/4180 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...