/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/sigma.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-17 18:42:01,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-17 18:42:01,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-17 18:42:01,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-17 18:42:01,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-17 18:42:01,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-17 18:42:01,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-17 18:42:01,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-17 18:42:01,264 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-17 18:42:01,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-17 18:42:01,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-17 18:42:01,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-17 18:42:01,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-17 18:42:01,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-17 18:42:01,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-17 18:42:01,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-17 18:42:01,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-17 18:42:01,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-17 18:42:01,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-17 18:42:01,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-17 18:42:01,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-17 18:42:01,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-17 18:42:01,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-17 18:42:01,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-17 18:42:01,298 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-17 18:42:01,299 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-17 18:42:01,299 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-17 18:42:01,300 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-17 18:42:01,301 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-17 18:42:01,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-17 18:42:01,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-17 18:42:01,302 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-17 18:42:01,303 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-17 18:42:01,304 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-17 18:42:01,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-17 18:42:01,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-17 18:42:01,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-17 18:42:01,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-17 18:42:01,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-17 18:42:01,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-17 18:42:01,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-17 18:42:01,308 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2020-04-17 18:42:01,323 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-17 18:42:01,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-17 18:42:01,324 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-17 18:42:01,324 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-17 18:42:01,325 INFO L138 SettingsManager]: * Use SBE=true [2020-04-17 18:42:01,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-17 18:42:01,325 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-17 18:42:01,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-17 18:42:01,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-17 18:42:01,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-17 18:42:01,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-17 18:42:01,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-17 18:42:01,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-17 18:42:01,326 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-17 18:42:01,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-17 18:42:01,327 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-17 18:42:01,327 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-17 18:42:01,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-17 18:42:01,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-17 18:42:01,328 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-17 18:42:01,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-17 18:42:01,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-17 18:42:01,328 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-17 18:42:01,328 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-17 18:42:01,329 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-17 18:42:01,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-17 18:42:01,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-17 18:42:01,329 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-17 18:42:01,329 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-17 18:42:01,643 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-17 18:42:01,661 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-17 18:42:01,665 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-17 18:42:01,666 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-17 18:42:01,666 INFO L275 PluginConnector]: CDTParser initialized [2020-04-17 18:42:01,667 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/sigma.i [2020-04-17 18:42:01,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cbb53407/88ba537f08ee4c1a89c61e8513d01dc1/FLAGbd749ddf5 [2020-04-17 18:42:02,372 INFO L306 CDTParser]: Found 1 translation units. [2020-04-17 18:42:02,373 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/sigma.i [2020-04-17 18:42:02,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cbb53407/88ba537f08ee4c1a89c61e8513d01dc1/FLAGbd749ddf5 [2020-04-17 18:42:02,644 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0cbb53407/88ba537f08ee4c1a89c61e8513d01dc1 [2020-04-17 18:42:02,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-17 18:42:02,676 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-17 18:42:02,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-17 18:42:02,679 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-17 18:42:02,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-17 18:42:02,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:42:02" (1/1) ... [2020-04-17 18:42:02,693 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37e09c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:42:02, skipping insertion in model container [2020-04-17 18:42:02,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:42:02" (1/1) ... [2020-04-17 18:42:02,702 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-17 18:42:02,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-17 18:42:03,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:42:03,390 INFO L203 MainTranslator]: Completed pre-run [2020-04-17 18:42:03,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-17 18:42:03,630 INFO L208 MainTranslator]: Completed translation [2020-04-17 18:42:03,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:42:03 WrapperNode [2020-04-17 18:42:03,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-17 18:42:03,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-17 18:42:03,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-17 18:42:03,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-17 18:42:03,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:42:03" (1/1) ... [2020-04-17 18:42:03,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:42:03" (1/1) ... [2020-04-17 18:42:03,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-17 18:42:03,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-17 18:42:03,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-17 18:42:03,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-17 18:42:03,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:42:03" (1/1) ... [2020-04-17 18:42:03,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:42:03" (1/1) ... [2020-04-17 18:42:03,708 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:42:03" (1/1) ... [2020-04-17 18:42:03,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:42:03" (1/1) ... [2020-04-17 18:42:03,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:42:03" (1/1) ... [2020-04-17 18:42:03,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:42:03" (1/1) ... [2020-04-17 18:42:03,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:42:03" (1/1) ... [2020-04-17 18:42:03,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-17 18:42:03,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-17 18:42:03,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-17 18:42:03,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-17 18:42:03,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:42:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:42:03,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-17 18:42:03,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-04-17 18:42:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-17 18:42:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-04-17 18:42:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-17 18:42:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-04-17 18:42:03,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-04-17 18:42:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2020-04-17 18:42:03,811 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2020-04-17 18:42:03,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-17 18:42:03,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-17 18:42:03,813 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-17 18:42:04,302 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-17 18:42:04,303 INFO L295 CfgBuilder]: Removed 13 assume(true) statements. [2020-04-17 18:42:04,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:42:04 BoogieIcfgContainer [2020-04-17 18:42:04,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-17 18:42:04,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-17 18:42:04,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-17 18:42:04,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-17 18:42:04,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 06:42:02" (1/3) ... [2020-04-17 18:42:04,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee63603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:42:04, skipping insertion in model container [2020-04-17 18:42:04,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:42:03" (2/3) ... [2020-04-17 18:42:04,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee63603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:42:04, skipping insertion in model container [2020-04-17 18:42:04,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:42:04" (3/3) ... [2020-04-17 18:42:04,326 INFO L109 eAbstractionObserver]: Analyzing ICFG sigma.i [2020-04-17 18:42:04,339 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-17 18:42:04,339 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-17 18:42:04,348 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-17 18:42:04,349 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-17 18:42:04,389 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:04,389 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:04,390 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:04,390 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:04,390 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:04,390 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:04,394 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:04,394 WARN L315 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:04,394 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:04,395 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:04,414 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 18:42:04,433 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:42:04,434 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:42:04,434 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:42:04,434 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:42:04,434 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:42:04,434 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:42:04,434 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:42:04,434 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:42:04,448 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 84 transitions, 176 flow [2020-04-17 18:42:04,449 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 84 transitions, 176 flow [2020-04-17 18:42:04,499 INFO L129 PetriNetUnfolder]: 13/121 cut-off events. [2020-04-17 18:42:04,500 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-04-17 18:42:04,504 INFO L80 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 121 events. 13/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 205 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2020-04-17 18:42:04,506 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 79 places, 84 transitions, 176 flow [2020-04-17 18:42:04,535 INFO L129 PetriNetUnfolder]: 13/121 cut-off events. [2020-04-17 18:42:04,535 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-04-17 18:42:04,536 INFO L80 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 121 events. 13/121 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 205 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 67. Up to 4 conditions per place. [2020-04-17 18:42:04,537 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 344 [2020-04-17 18:42:04,538 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:42:04,652 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:04,683 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:04,689 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:04,716 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:04,718 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:04,719 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:134 [2020-04-17 18:42:04,737 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:04,768 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:04,773 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:04,803 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:04,805 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:04,806 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:134 [2020-04-17 18:42:07,607 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:07,651 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:07,658 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:07,697 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:07,698 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:07,699 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:42:07,718 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:07,755 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:07,785 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:07,825 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:07,826 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:07,827 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:42:10,045 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:10,086 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:10,094 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:10,139 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:10,141 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:10,144 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:42:10,159 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:10,202 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:10,218 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:10,261 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:10,262 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:10,263 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:42:13,195 WARN L192 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-04-17 18:42:13,644 WARN L192 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2020-04-17 18:42:13,753 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-04-17 18:42:13,758 INFO L206 etLargeBlockEncoding]: Checked pairs total: 293 [2020-04-17 18:42:13,759 INFO L214 etLargeBlockEncoding]: Total number of compositions: 77 [2020-04-17 18:42:13,763 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 17 transitions, 42 flow [2020-04-17 18:42:13,772 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 36 states. [2020-04-17 18:42:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-04-17 18:42:13,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 18:42:13,780 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:13,781 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 18:42:13,781 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:13,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:13,786 INFO L82 PathProgramCache]: Analyzing trace with hash 10051566, now seen corresponding path program 1 times [2020-04-17 18:42:13,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:13,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795958119] [2020-04-17 18:42:13,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:13,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795958119] [2020-04-17 18:42:13,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:42:13,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:42:13,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143634588] [2020-04-17 18:42:13,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:42:13,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:13,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:42:13,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:42:13,999 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-04-17 18:42:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:14,046 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2020-04-17 18:42:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:42:14,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 18:42:14,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:14,058 INFO L225 Difference]: With dead ends: 36 [2020-04-17 18:42:14,058 INFO L226 Difference]: Without dead ends: 31 [2020-04-17 18:42:14,059 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:42:14,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-04-17 18:42:14,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-04-17 18:42:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-04-17 18:42:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 43 transitions. [2020-04-17 18:42:14,096 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 43 transitions. Word has length 4 [2020-04-17 18:42:14,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:14,097 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 43 transitions. [2020-04-17 18:42:14,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:42:14,097 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 43 transitions. [2020-04-17 18:42:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-04-17 18:42:14,098 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:14,098 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:14,098 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:14,099 INFO L82 PathProgramCache]: Analyzing trace with hash -352775593, now seen corresponding path program 1 times [2020-04-17 18:42:14,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:14,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414157713] [2020-04-17 18:42:14,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:14,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:42:14,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414157713] [2020-04-17 18:42:14,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:42:14,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:42:14,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192649338] [2020-04-17 18:42:14,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:42:14,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:14,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:42:14,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:42:14,237 INFO L87 Difference]: Start difference. First operand 31 states and 43 transitions. Second operand 4 states. [2020-04-17 18:42:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:14,275 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2020-04-17 18:42:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:42:14,275 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-04-17 18:42:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:14,277 INFO L225 Difference]: With dead ends: 28 [2020-04-17 18:42:14,277 INFO L226 Difference]: Without dead ends: 28 [2020-04-17 18:42:14,278 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:42:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-04-17 18:42:14,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-04-17 18:42:14,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-04-17 18:42:14,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2020-04-17 18:42:14,285 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 9 [2020-04-17 18:42:14,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:14,285 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2020-04-17 18:42:14,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:42:14,285 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2020-04-17 18:42:14,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:42:14,286 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:14,286 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-04-17 18:42:14,287 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:14,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1949275916, now seen corresponding path program 1 times [2020-04-17 18:42:14,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:14,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853753514] [2020-04-17 18:42:14,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:42:14,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:42:14,387 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 18:42:14,387 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 18:42:14,388 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 18:42:14,389 WARN L363 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 18:42:14,389 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-04-17 18:42:14,398 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,398 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,398 WARN L315 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,398 WARN L315 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,399 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,399 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,399 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,399 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,399 WARN L315 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,399 WARN L315 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,400 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,400 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,400 WARN L315 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,400 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,401 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,401 WARN L315 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,403 WARN L315 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,404 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,404 WARN L315 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,404 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:14,408 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 18:42:14,408 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:42:14,408 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:42:14,408 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:42:14,408 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:42:14,408 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:42:14,408 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:42:14,409 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:42:14,409 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:42:14,411 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 90 transitions, 198 flow [2020-04-17 18:42:14,411 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 198 flow [2020-04-17 18:42:14,487 INFO L129 PetriNetUnfolder]: 24/209 cut-off events. [2020-04-17 18:42:14,490 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-04-17 18:42:14,492 INFO L80 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 209 events. 24/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 123. Up to 8 conditions per place. [2020-04-17 18:42:14,496 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 86 places, 90 transitions, 198 flow [2020-04-17 18:42:14,524 INFO L129 PetriNetUnfolder]: 24/209 cut-off events. [2020-04-17 18:42:14,525 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-04-17 18:42:14,525 INFO L80 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 209 events. 24/209 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 438 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 123. Up to 8 conditions per place. [2020-04-17 18:42:14,528 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 824 [2020-04-17 18:42:14,528 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:42:14,963 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:14,986 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:14,989 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:15,008 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:15,010 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:15,010 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:134 [2020-04-17 18:42:15,023 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:15,048 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:15,052 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:15,080 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:15,081 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:15,082 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:134 [2020-04-17 18:42:17,573 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:17,607 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:17,612 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:17,653 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:17,655 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:17,655 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:42:17,668 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:17,703 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:17,708 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:17,737 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:17,739 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:17,739 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:42:20,193 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:20,244 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:20,249 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:20,287 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:20,288 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:20,288 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:42:20,312 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:20,350 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:20,355 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:20,393 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:20,395 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:20,395 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:42:22,751 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-04-17 18:42:23,027 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-04-17 18:42:23,129 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-04-17 18:42:23,361 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-04-17 18:42:23,472 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-04-17 18:42:23,511 INFO L206 etLargeBlockEncoding]: Checked pairs total: 676 [2020-04-17 18:42:23,511 INFO L214 etLargeBlockEncoding]: Total number of compositions: 79 [2020-04-17 18:42:23,511 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 22 transitions, 62 flow [2020-04-17 18:42:23,517 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 109 states. [2020-04-17 18:42:23,517 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states. [2020-04-17 18:42:23,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 18:42:23,518 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:23,518 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 18:42:23,518 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:23,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:23,518 INFO L82 PathProgramCache]: Analyzing trace with hash 15623651, now seen corresponding path program 1 times [2020-04-17 18:42:23,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:23,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24484149] [2020-04-17 18:42:23,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:23,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24484149] [2020-04-17 18:42:23,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:42:23,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:42:23,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766481967] [2020-04-17 18:42:23,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:42:23,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:23,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:42:23,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:42:23,556 INFO L87 Difference]: Start difference. First operand 109 states. Second operand 3 states. [2020-04-17 18:42:23,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:23,590 INFO L93 Difference]: Finished difference Result 109 states and 191 transitions. [2020-04-17 18:42:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:42:23,590 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 18:42:23,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:23,593 INFO L225 Difference]: With dead ends: 109 [2020-04-17 18:42:23,594 INFO L226 Difference]: Without dead ends: 98 [2020-04-17 18:42:23,594 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:42:23,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-04-17 18:42:23,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-04-17 18:42:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-04-17 18:42:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 174 transitions. [2020-04-17 18:42:23,607 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 174 transitions. Word has length 4 [2020-04-17 18:42:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:23,608 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 174 transitions. [2020-04-17 18:42:23,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:42:23,608 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 174 transitions. [2020-04-17 18:42:23,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:42:23,609 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:23,609 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:23,609 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:23,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:23,609 INFO L82 PathProgramCache]: Analyzing trace with hash 125559316, now seen corresponding path program 1 times [2020-04-17 18:42:23,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:23,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643084460] [2020-04-17 18:42:23,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:42:23,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643084460] [2020-04-17 18:42:23,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:42:23,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:42:23,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113602139] [2020-04-17 18:42:23,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:42:23,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:23,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:42:23,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:42:23,663 INFO L87 Difference]: Start difference. First operand 98 states and 174 transitions. Second operand 4 states. [2020-04-17 18:42:23,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:23,705 INFO L93 Difference]: Finished difference Result 103 states and 171 transitions. [2020-04-17 18:42:23,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:42:23,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 18:42:23,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:23,707 INFO L225 Difference]: With dead ends: 103 [2020-04-17 18:42:23,707 INFO L226 Difference]: Without dead ends: 103 [2020-04-17 18:42:23,708 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:42:23,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-04-17 18:42:23,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2020-04-17 18:42:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-04-17 18:42:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 164 transitions. [2020-04-17 18:42:23,720 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 164 transitions. Word has length 10 [2020-04-17 18:42:23,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:23,720 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 164 transitions. [2020-04-17 18:42:23,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:42:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 164 transitions. [2020-04-17 18:42:23,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:42:23,721 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:23,721 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:23,722 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:23,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:23,722 INFO L82 PathProgramCache]: Analyzing trace with hash 823605760, now seen corresponding path program 1 times [2020-04-17 18:42:23,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:23,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43982735] [2020-04-17 18:42:23,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:23,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43982735] [2020-04-17 18:42:23,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147977267] [2020-04-17 18:42:23,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:42:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:23,882 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 18:42:23,883 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:42:23,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:23,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 18:42:23,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716823586] [2020-04-17 18:42:23,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:42:23,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:23,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:42:23,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:42:23,928 INFO L87 Difference]: Start difference. First operand 97 states and 164 transitions. Second operand 10 states. [2020-04-17 18:42:24,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:24,007 INFO L93 Difference]: Finished difference Result 95 states and 159 transitions. [2020-04-17 18:42:24,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:42:24,007 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 18:42:24,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:24,008 INFO L225 Difference]: With dead ends: 95 [2020-04-17 18:42:24,008 INFO L226 Difference]: Without dead ends: 95 [2020-04-17 18:42:24,008 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:42:24,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-04-17 18:42:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-04-17 18:42:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-04-17 18:42:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 159 transitions. [2020-04-17 18:42:24,017 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 159 transitions. Word has length 17 [2020-04-17 18:42:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:24,017 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 159 transitions. [2020-04-17 18:42:24,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:42:24,018 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 159 transitions. [2020-04-17 18:42:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:42:24,019 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:24,019 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1] [2020-04-17 18:42:24,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:24,223 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:24,223 INFO L82 PathProgramCache]: Analyzing trace with hash 26114190, now seen corresponding path program 1 times [2020-04-17 18:42:24,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:24,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166948690] [2020-04-17 18:42:24,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:42:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:42:24,273 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 18:42:24,273 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 18:42:24,274 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 18:42:24,274 WARN L363 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 18:42:24,275 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-04-17 18:42:24,282 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,282 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,282 WARN L315 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,282 WARN L315 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,282 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,283 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,283 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,283 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,283 WARN L315 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,283 WARN L315 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,284 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,284 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,284 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,284 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,284 WARN L315 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,284 WARN L315 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,284 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,285 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,287 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,287 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,287 WARN L315 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,287 WARN L315 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,289 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,289 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,289 WARN L315 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,289 WARN L315 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,291 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,291 WARN L315 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,291 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,291 WARN L315 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:24,307 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 18:42:24,308 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:42:24,308 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:42:24,308 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:42:24,308 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:42:24,308 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:42:24,308 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:42:24,308 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:42:24,308 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:42:24,310 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 96 transitions, 222 flow [2020-04-17 18:42:24,312 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 222 flow [2020-04-17 18:42:24,351 INFO L129 PetriNetUnfolder]: 46/368 cut-off events. [2020-04-17 18:42:24,351 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-04-17 18:42:24,354 INFO L80 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 368 events. 46/368 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1021 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 217. Up to 16 conditions per place. [2020-04-17 18:42:24,358 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 96 transitions, 222 flow [2020-04-17 18:42:24,392 INFO L129 PetriNetUnfolder]: 46/368 cut-off events. [2020-04-17 18:42:24,393 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-04-17 18:42:24,394 INFO L80 FinitePrefix]: Finished finitePrefix Result has 396 conditions, 368 events. 46/368 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1021 event pairs, 1 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 217. Up to 16 conditions per place. [2020-04-17 18:42:24,399 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1320 [2020-04-17 18:42:24,399 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:42:24,545 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:24,577 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:24,581 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:24,607 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:24,608 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:24,608 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:134 [2020-04-17 18:42:24,621 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:24,649 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:24,654 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:24,682 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:24,683 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:24,684 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:134 [2020-04-17 18:42:27,601 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:27,630 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:27,633 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:27,672 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:27,673 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:27,674 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:42:27,686 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:27,737 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:27,742 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:27,789 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:27,790 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:27,790 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:42:30,185 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:30,245 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:30,249 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:30,297 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:30,298 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:30,299 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:42:30,308 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:30,347 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:30,351 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:30,386 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:30,387 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:30,387 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:42:32,753 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-04-17 18:42:32,862 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-04-17 18:42:33,107 WARN L192 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-04-17 18:42:33,435 WARN L192 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-04-17 18:42:33,555 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-04-17 18:42:33,570 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1092 [2020-04-17 18:42:33,571 INFO L214 etLargeBlockEncoding]: Total number of compositions: 84 [2020-04-17 18:42:33,571 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 80 flow [2020-04-17 18:42:33,584 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 297 states. [2020-04-17 18:42:33,585 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states. [2020-04-17 18:42:33,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 18:42:33,585 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:33,586 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 18:42:33,586 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:33,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:33,586 INFO L82 PathProgramCache]: Analyzing trace with hash 21531642, now seen corresponding path program 1 times [2020-04-17 18:42:33,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:33,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344681270] [2020-04-17 18:42:33,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:33,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344681270] [2020-04-17 18:42:33,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:42:33,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:42:33,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157459999] [2020-04-17 18:42:33,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:42:33,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:33,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:42:33,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:42:33,640 INFO L87 Difference]: Start difference. First operand 297 states. Second operand 3 states. [2020-04-17 18:42:33,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:33,671 INFO L93 Difference]: Finished difference Result 297 states and 636 transitions. [2020-04-17 18:42:33,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:42:33,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 18:42:33,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:33,674 INFO L225 Difference]: With dead ends: 297 [2020-04-17 18:42:33,674 INFO L226 Difference]: Without dead ends: 268 [2020-04-17 18:42:33,675 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:42:33,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-04-17 18:42:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2020-04-17 18:42:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2020-04-17 18:42:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 580 transitions. [2020-04-17 18:42:33,700 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 580 transitions. Word has length 4 [2020-04-17 18:42:33,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:33,701 INFO L479 AbstractCegarLoop]: Abstraction has 268 states and 580 transitions. [2020-04-17 18:42:33,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:42:33,701 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 580 transitions. [2020-04-17 18:42:33,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:42:33,702 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:33,702 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:33,702 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:33,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:33,702 INFO L82 PathProgramCache]: Analyzing trace with hash 656916489, now seen corresponding path program 1 times [2020-04-17 18:42:33,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:33,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391749157] [2020-04-17 18:42:33,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:42:33,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391749157] [2020-04-17 18:42:33,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:42:33,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:42:33,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507122491] [2020-04-17 18:42:33,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:42:33,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:33,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:42:33,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:42:33,753 INFO L87 Difference]: Start difference. First operand 268 states and 580 transitions. Second operand 4 states. [2020-04-17 18:42:33,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:33,782 INFO L93 Difference]: Finished difference Result 299 states and 612 transitions. [2020-04-17 18:42:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:42:33,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 18:42:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:33,785 INFO L225 Difference]: With dead ends: 299 [2020-04-17 18:42:33,785 INFO L226 Difference]: Without dead ends: 299 [2020-04-17 18:42:33,785 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:42:33,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-04-17 18:42:33,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 277. [2020-04-17 18:42:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-04-17 18:42:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 577 transitions. [2020-04-17 18:42:33,800 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 577 transitions. Word has length 10 [2020-04-17 18:42:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:33,801 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 577 transitions. [2020-04-17 18:42:33,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:42:33,801 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 577 transitions. [2020-04-17 18:42:33,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:42:33,802 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:33,802 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:33,802 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:33,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:33,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1586347520, now seen corresponding path program 1 times [2020-04-17 18:42:33,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:33,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716608245] [2020-04-17 18:42:33,803 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:33,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716608245] [2020-04-17 18:42:33,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16735381] [2020-04-17 18:42:33,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:42:33,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:33,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 18:42:33,952 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:33,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:42:33,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:33,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 18:42:33,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926411979] [2020-04-17 18:42:33,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:42:33,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:33,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:42:33,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:42:33,982 INFO L87 Difference]: Start difference. First operand 277 states and 577 transitions. Second operand 10 states. [2020-04-17 18:42:34,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:34,043 INFO L93 Difference]: Finished difference Result 275 states and 572 transitions. [2020-04-17 18:42:34,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:42:34,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 18:42:34,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:34,049 INFO L225 Difference]: With dead ends: 275 [2020-04-17 18:42:34,050 INFO L226 Difference]: Without dead ends: 275 [2020-04-17 18:42:34,050 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:42:34,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-04-17 18:42:34,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2020-04-17 18:42:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-04-17 18:42:34,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 572 transitions. [2020-04-17 18:42:34,060 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 572 transitions. Word has length 17 [2020-04-17 18:42:34,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:34,061 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 572 transitions. [2020-04-17 18:42:34,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:42:34,061 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 572 transitions. [2020-04-17 18:42:34,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:42:34,062 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:34,063 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:34,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:34,273 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:34,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:34,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1691264658, now seen corresponding path program 1 times [2020-04-17 18:42:34,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:34,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776279355] [2020-04-17 18:42:34,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:34,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776279355] [2020-04-17 18:42:34,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68751937] [2020-04-17 18:42:34,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:42:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:34,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 18:42:34,431 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:42:34,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:34,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2020-04-17 18:42:34,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121606929] [2020-04-17 18:42:34,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:42:34,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:34,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:42:34,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:42:34,469 INFO L87 Difference]: Start difference. First operand 275 states and 572 transitions. Second operand 12 states. [2020-04-17 18:42:34,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:34,559 INFO L93 Difference]: Finished difference Result 271 states and 560 transitions. [2020-04-17 18:42:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:42:34,559 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 18:42:34,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:34,562 INFO L225 Difference]: With dead ends: 271 [2020-04-17 18:42:34,562 INFO L226 Difference]: Without dead ends: 271 [2020-04-17 18:42:34,562 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:42:34,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-04-17 18:42:34,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2020-04-17 18:42:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-04-17 18:42:34,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 560 transitions. [2020-04-17 18:42:34,570 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 560 transitions. Word has length 23 [2020-04-17 18:42:34,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:34,571 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 560 transitions. [2020-04-17 18:42:34,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:42:34,571 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 560 transitions. [2020-04-17 18:42:34,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:42:34,572 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:34,572 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2020-04-17 18:42:34,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:34,776 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:34,777 INFO L82 PathProgramCache]: Analyzing trace with hash 539631963, now seen corresponding path program 1 times [2020-04-17 18:42:34,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:34,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172500927] [2020-04-17 18:42:34,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:42:34,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:42:34,847 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 18:42:34,847 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 18:42:34,848 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 18:42:34,848 WARN L363 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 18:42:34,849 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-04-17 18:42:34,857 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,858 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,858 WARN L315 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,858 WARN L315 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,858 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,858 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,859 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,859 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,859 WARN L315 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,859 WARN L315 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,859 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,859 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,860 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,860 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,860 WARN L315 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,860 WARN L315 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,860 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,860 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,861 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,861 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,861 WARN L315 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,861 WARN L315 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,861 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,861 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,862 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,862 WARN L315 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,862 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,862 WARN L315 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,864 WARN L315 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,864 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,864 WARN L315 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,864 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,865 WARN L315 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,866 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,866 WARN L315 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,866 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,867 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,867 WARN L315 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,868 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,868 WARN L315 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:34,872 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 18:42:34,872 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:42:34,872 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:42:34,872 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:42:34,872 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:42:34,872 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:42:34,873 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:42:34,873 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:42:34,873 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:42:34,874 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 102 transitions, 248 flow [2020-04-17 18:42:34,874 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 248 flow [2020-04-17 18:42:34,963 INFO L129 PetriNetUnfolder]: 92/671 cut-off events. [2020-04-17 18:42:34,963 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-04-17 18:42:34,966 INFO L80 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 671 events. 92/671 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2596 event pairs, 6 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 388. Up to 32 conditions per place. [2020-04-17 18:42:34,980 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 100 places, 102 transitions, 248 flow [2020-04-17 18:42:35,127 INFO L129 PetriNetUnfolder]: 92/671 cut-off events. [2020-04-17 18:42:35,128 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-04-17 18:42:35,130 INFO L80 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 671 events. 92/671 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2596 event pairs, 6 based on Foata normal form. 0/563 useless extension candidates. Maximal degree in co-relation 388. Up to 32 conditions per place. [2020-04-17 18:42:35,141 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1872 [2020-04-17 18:42:35,142 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:42:35,421 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:35,442 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:35,445 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:35,462 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:35,462 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 18:42:35,462 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:108, output treesize:62 [2020-04-17 18:42:35,470 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:35,494 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:35,498 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:35,515 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:35,516 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 18:42:35,516 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:108, output treesize:62 [2020-04-17 18:42:35,610 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:35,640 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:35,649 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:35,679 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:35,680 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:35,680 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:134 [2020-04-17 18:42:35,690 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:35,718 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:35,722 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:35,745 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:35,746 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:35,746 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:134 [2020-04-17 18:42:37,921 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:37,936 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:37,939 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:37,948 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:37,948 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 18:42:37,949 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:108, output treesize:62 [2020-04-17 18:42:37,957 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:37,973 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:37,975 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:37,985 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:37,985 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 18:42:37,986 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:108, output treesize:62 [2020-04-17 18:42:38,408 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:38,441 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:38,446 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:38,477 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:38,478 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:38,478 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:42:38,491 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:38,522 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:38,526 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:38,553 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:38,554 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:38,555 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:42:41,182 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:41,220 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:41,224 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:41,264 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:41,265 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:41,265 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:42:41,281 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:41,321 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:41,327 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:41,368 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:41,369 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:41,370 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:42:43,655 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:43,696 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:43,701 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:43,739 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:43,740 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:43,740 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:42:43,749 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:43,789 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:43,792 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:43,832 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:43,833 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:43,833 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:42:46,181 WARN L192 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85 [2020-04-17 18:42:46,530 WARN L192 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-04-17 18:42:46,689 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-04-17 18:42:46,696 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1730 [2020-04-17 18:42:46,696 INFO L214 etLargeBlockEncoding]: Total number of compositions: 84 [2020-04-17 18:42:46,696 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 100 flow [2020-04-17 18:42:46,723 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 817 states. [2020-04-17 18:42:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states. [2020-04-17 18:42:46,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 18:42:46,724 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:46,724 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 18:42:46,724 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:46,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:46,724 INFO L82 PathProgramCache]: Analyzing trace with hash 27625699, now seen corresponding path program 1 times [2020-04-17 18:42:46,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:46,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244099498] [2020-04-17 18:42:46,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:46,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244099498] [2020-04-17 18:42:46,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:42:46,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:42:46,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989405508] [2020-04-17 18:42:46,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:42:46,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:46,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:42:46,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:42:46,759 INFO L87 Difference]: Start difference. First operand 817 states. Second operand 3 states. [2020-04-17 18:42:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:46,789 INFO L93 Difference]: Finished difference Result 817 states and 2065 transitions. [2020-04-17 18:42:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:42:46,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 18:42:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:46,795 INFO L225 Difference]: With dead ends: 817 [2020-04-17 18:42:46,795 INFO L226 Difference]: Without dead ends: 734 [2020-04-17 18:42:46,796 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:42:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2020-04-17 18:42:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2020-04-17 18:42:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-04-17 18:42:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1874 transitions. [2020-04-17 18:42:46,825 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1874 transitions. Word has length 4 [2020-04-17 18:42:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:46,825 INFO L479 AbstractCegarLoop]: Abstraction has 734 states and 1874 transitions. [2020-04-17 18:42:46,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:42:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1874 transitions. [2020-04-17 18:42:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:42:46,826 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:46,826 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:46,826 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:46,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:46,826 INFO L82 PathProgramCache]: Analyzing trace with hash -399158139, now seen corresponding path program 1 times [2020-04-17 18:42:46,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:46,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857792721] [2020-04-17 18:42:46,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:42:46,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857792721] [2020-04-17 18:42:46,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:42:46,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:42:46,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616220882] [2020-04-17 18:42:46,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:42:46,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:46,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:42:46,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:42:46,860 INFO L87 Difference]: Start difference. First operand 734 states and 1874 transitions. Second operand 4 states. [2020-04-17 18:42:46,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:46,899 INFO L93 Difference]: Finished difference Result 843 states and 2061 transitions. [2020-04-17 18:42:46,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:42:46,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 18:42:46,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:46,905 INFO L225 Difference]: With dead ends: 843 [2020-04-17 18:42:46,905 INFO L226 Difference]: Without dead ends: 843 [2020-04-17 18:42:46,906 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:42:46,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2020-04-17 18:42:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 781. [2020-04-17 18:42:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 781 states. [2020-04-17 18:42:46,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1934 transitions. [2020-04-17 18:42:46,931 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1934 transitions. Word has length 10 [2020-04-17 18:42:46,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:46,932 INFO L479 AbstractCegarLoop]: Abstraction has 781 states and 1934 transitions. [2020-04-17 18:42:46,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:42:46,932 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1934 transitions. [2020-04-17 18:42:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:42:46,933 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:46,933 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:46,933 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:46,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:46,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2066968861, now seen corresponding path program 1 times [2020-04-17 18:42:46,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:46,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273334532] [2020-04-17 18:42:46,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:46,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273334532] [2020-04-17 18:42:46,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253571] [2020-04-17 18:42:46,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:42:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:47,066 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 18:42:47,067 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:47,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:42:47,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:47,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 18:42:47,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575360859] [2020-04-17 18:42:47,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:42:47,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:47,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:42:47,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:42:47,103 INFO L87 Difference]: Start difference. First operand 781 states and 1934 transitions. Second operand 10 states. [2020-04-17 18:42:47,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:47,193 INFO L93 Difference]: Finished difference Result 779 states and 1929 transitions. [2020-04-17 18:42:47,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:42:47,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 18:42:47,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:47,198 INFO L225 Difference]: With dead ends: 779 [2020-04-17 18:42:47,199 INFO L226 Difference]: Without dead ends: 779 [2020-04-17 18:42:47,199 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:42:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2020-04-17 18:42:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 779. [2020-04-17 18:42:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 779 states. [2020-04-17 18:42:47,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 1929 transitions. [2020-04-17 18:42:47,223 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 1929 transitions. Word has length 17 [2020-04-17 18:42:47,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:47,223 INFO L479 AbstractCegarLoop]: Abstraction has 779 states and 1929 transitions. [2020-04-17 18:42:47,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:42:47,224 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 1929 transitions. [2020-04-17 18:42:47,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:42:47,228 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:47,228 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:47,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:47,439 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:47,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:47,439 INFO L82 PathProgramCache]: Analyzing trace with hash 899828126, now seen corresponding path program 1 times [2020-04-17 18:42:47,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:47,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788313606] [2020-04-17 18:42:47,440 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:47,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:47,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:47,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788313606] [2020-04-17 18:42:47,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31380059] [2020-04-17 18:42:47,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:42:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:47,596 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 18:42:47,602 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:42:47,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:47,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2020-04-17 18:42:47,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626882637] [2020-04-17 18:42:47,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:42:47,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:47,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:42:47,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:42:47,642 INFO L87 Difference]: Start difference. First operand 779 states and 1929 transitions. Second operand 12 states. [2020-04-17 18:42:47,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:47,706 INFO L93 Difference]: Finished difference Result 775 states and 1917 transitions. [2020-04-17 18:42:47,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:42:47,706 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 18:42:47,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:47,711 INFO L225 Difference]: With dead ends: 775 [2020-04-17 18:42:47,711 INFO L226 Difference]: Without dead ends: 775 [2020-04-17 18:42:47,712 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:42:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-04-17 18:42:47,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 775. [2020-04-17 18:42:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 775 states. [2020-04-17 18:42:47,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1917 transitions. [2020-04-17 18:42:47,741 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1917 transitions. Word has length 23 [2020-04-17 18:42:47,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:47,742 INFO L479 AbstractCegarLoop]: Abstraction has 775 states and 1917 transitions. [2020-04-17 18:42:47,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:42:47,742 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1917 transitions. [2020-04-17 18:42:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 18:42:47,744 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:47,745 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:47,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:47,949 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:47,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:47,950 INFO L82 PathProgramCache]: Analyzing trace with hash -683367746, now seen corresponding path program 1 times [2020-04-17 18:42:47,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:47,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714948370] [2020-04-17 18:42:47,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:42:48,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714948370] [2020-04-17 18:42:48,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798248325] [2020-04-17 18:42:48,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:42:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:42:48,135 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 18:42:48,136 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:42:48,190 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:42:48,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:42:48,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2020-04-17 18:42:48,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345930083] [2020-04-17 18:42:48,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:42:48,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:42:48,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:42:48,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:48,192 INFO L87 Difference]: Start difference. First operand 775 states and 1917 transitions. Second operand 14 states. [2020-04-17 18:42:48,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:42:48,305 INFO L93 Difference]: Finished difference Result 767 states and 1889 transitions. [2020-04-17 18:42:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 18:42:48,306 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-04-17 18:42:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:42:48,312 INFO L225 Difference]: With dead ends: 767 [2020-04-17 18:42:48,312 INFO L226 Difference]: Without dead ends: 767 [2020-04-17 18:42:48,313 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:42:48,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2020-04-17 18:42:48,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2020-04-17 18:42:48,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2020-04-17 18:42:48,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1889 transitions. [2020-04-17 18:42:48,336 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1889 transitions. Word has length 29 [2020-04-17 18:42:48,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:42:48,337 INFO L479 AbstractCegarLoop]: Abstraction has 767 states and 1889 transitions. [2020-04-17 18:42:48,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:42:48,337 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1889 transitions. [2020-04-17 18:42:48,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 18:42:48,338 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:42:48,338 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-04-17 18:42:48,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:42:48,543 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:42:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:42:48,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1728417408, now seen corresponding path program 1 times [2020-04-17 18:42:48,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:42:48,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905101398] [2020-04-17 18:42:48,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:42:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:42:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:42:48,603 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 18:42:48,603 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 18:42:48,603 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 18:42:48,603 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 18:42:48,606 WARN L363 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 18:42:48,606 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-04-17 18:42:48,617 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,617 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,617 WARN L315 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,617 WARN L315 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,618 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,618 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,618 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,618 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,618 WARN L315 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,618 WARN L315 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,618 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,619 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,619 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,619 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,619 WARN L315 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,619 WARN L315 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,619 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,619 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,620 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,620 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,620 WARN L315 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,620 WARN L315 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,620 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,620 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,621 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,621 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,621 WARN L315 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,621 WARN L315 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,621 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,621 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,622 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,622 WARN L315 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,622 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,622 WARN L315 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,624 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,624 WARN L315 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,624 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,625 WARN L315 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,626 WARN L315 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,626 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,626 WARN L315 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,626 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,628 WARN L315 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,628 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,628 WARN L315 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,628 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,630 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,630 WARN L315 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,630 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,630 WARN L315 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:42:48,635 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 18:42:48,635 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:42:48,635 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:42:48,635 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:42:48,635 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:42:48,635 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:42:48,636 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:42:48,636 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:42:48,636 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:42:48,637 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 108 transitions, 276 flow [2020-04-17 18:42:48,637 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 276 flow [2020-04-17 18:42:48,812 INFO L129 PetriNetUnfolder]: 190/1266 cut-off events. [2020-04-17 18:42:48,813 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-04-17 18:42:48,821 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 1266 events. 190/1266 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6695 event pairs, 23 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 716. Up to 80 conditions per place. [2020-04-17 18:42:48,852 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 276 flow [2020-04-17 18:42:49,018 INFO L129 PetriNetUnfolder]: 190/1266 cut-off events. [2020-04-17 18:42:49,018 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-04-17 18:42:49,023 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 1266 events. 190/1266 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 6695 event pairs, 23 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 716. Up to 80 conditions per place. [2020-04-17 18:42:49,042 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2480 [2020-04-17 18:42:49,042 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:42:49,896 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:49,940 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:49,946 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:49,977 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:49,978 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:49,979 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:42:50,001 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:50,053 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:50,058 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:50,104 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:50,105 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:50,105 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:42:52,191 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:52,223 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:52,227 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:52,261 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:52,261 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:52,262 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:42:52,271 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:52,305 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:52,309 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:52,339 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:52,339 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:52,340 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:42:54,448 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:54,486 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:54,490 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:54,523 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:54,524 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:54,524 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:42:54,535 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:54,569 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:54,573 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:54,603 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:54,604 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:54,604 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:42:56,832 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:56,876 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:56,880 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:56,920 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:56,921 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:56,921 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:42:56,934 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:56,976 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:56,980 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:57,021 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:57,022 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:42:57,022 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:42:59,034 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,071 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,075 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,108 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,109 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,109 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:86 [2020-04-17 18:42:59,116 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,158 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,161 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,193 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,193 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,194 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:86 [2020-04-17 18:42:59,208 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,246 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,250 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,284 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,284 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,284 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:86 [2020-04-17 18:42:59,301 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,339 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,347 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,380 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,380 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,380 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:86 [2020-04-17 18:42:59,388 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,425 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,429 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,464 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,465 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,465 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:86 [2020-04-17 18:42:59,473 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,513 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,516 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,551 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,552 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,552 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:86 [2020-04-17 18:42:59,568 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,607 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,610 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,642 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,643 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,643 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:86 [2020-04-17 18:42:59,658 INFO L539 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,710 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,713 INFO L539 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,746 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:42:59,746 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-04-17 18:42:59,747 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:86 [2020-04-17 18:43:00,456 WARN L192 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-04-17 18:43:00,853 WARN L192 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 88 [2020-04-17 18:43:00,991 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-04-17 18:43:01,000 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1953 [2020-04-17 18:43:01,000 INFO L214 etLargeBlockEncoding]: Total number of compositions: 87 [2020-04-17 18:43:01,000 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 31 transitions, 122 flow [2020-04-17 18:43:01,118 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 2289 states. [2020-04-17 18:43:01,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2289 states. [2020-04-17 18:43:01,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 18:43:01,119 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:01,119 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 18:43:01,119 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:01,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:01,120 INFO L82 PathProgramCache]: Analyzing trace with hash 33997000, now seen corresponding path program 1 times [2020-04-17 18:43:01,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:01,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313489898] [2020-04-17 18:43:01,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:01,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313489898] [2020-04-17 18:43:01,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:43:01,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:43:01,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058495856] [2020-04-17 18:43:01,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:43:01,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:01,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:43:01,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:43:01,143 INFO L87 Difference]: Start difference. First operand 2289 states. Second operand 3 states. [2020-04-17 18:43:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:01,183 INFO L93 Difference]: Finished difference Result 2289 states and 6658 transitions. [2020-04-17 18:43:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:43:01,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 18:43:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:01,201 INFO L225 Difference]: With dead ends: 2289 [2020-04-17 18:43:01,201 INFO L226 Difference]: Without dead ends: 2044 [2020-04-17 18:43:01,203 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:43:01,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2020-04-17 18:43:01,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 2044. [2020-04-17 18:43:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2020-04-17 18:43:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 6008 transitions. [2020-04-17 18:43:01,290 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 6008 transitions. Word has length 4 [2020-04-17 18:43:01,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:01,290 INFO L479 AbstractCegarLoop]: Abstraction has 2044 states and 6008 transitions. [2020-04-17 18:43:01,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:43:01,290 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 6008 transitions. [2020-04-17 18:43:01,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:43:01,291 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:01,291 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:01,291 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:01,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:01,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1850212091, now seen corresponding path program 1 times [2020-04-17 18:43:01,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:01,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385522607] [2020-04-17 18:43:01,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:43:01,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385522607] [2020-04-17 18:43:01,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:43:01,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:43:01,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854123387] [2020-04-17 18:43:01,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:43:01,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:01,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:43:01,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:43:01,332 INFO L87 Difference]: Start difference. First operand 2044 states and 6008 transitions. Second operand 4 states. [2020-04-17 18:43:01,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:01,374 INFO L93 Difference]: Finished difference Result 2379 states and 6766 transitions. [2020-04-17 18:43:01,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:43:01,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 18:43:01,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:01,390 INFO L225 Difference]: With dead ends: 2379 [2020-04-17 18:43:01,391 INFO L226 Difference]: Without dead ends: 2379 [2020-04-17 18:43:01,391 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:43:01,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2020-04-17 18:43:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 2221. [2020-04-17 18:43:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2221 states. [2020-04-17 18:43:01,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2221 states to 2221 states and 6367 transitions. [2020-04-17 18:43:01,519 INFO L78 Accepts]: Start accepts. Automaton has 2221 states and 6367 transitions. Word has length 10 [2020-04-17 18:43:01,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:01,519 INFO L479 AbstractCegarLoop]: Abstraction has 2221 states and 6367 transitions. [2020-04-17 18:43:01,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:43:01,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2221 states and 6367 transitions. [2020-04-17 18:43:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:43:01,520 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:01,520 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:01,520 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:01,520 INFO L82 PathProgramCache]: Analyzing trace with hash -50306259, now seen corresponding path program 1 times [2020-04-17 18:43:01,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:01,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240237144] [2020-04-17 18:43:01,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:01,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240237144] [2020-04-17 18:43:01,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746666082] [2020-04-17 18:43:01,584 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:01,658 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 18:43:01,660 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:01,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:01,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 18:43:01,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823096870] [2020-04-17 18:43:01,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:43:01,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:01,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:43:01,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:43:01,687 INFO L87 Difference]: Start difference. First operand 2221 states and 6367 transitions. Second operand 10 states. [2020-04-17 18:43:01,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:01,763 INFO L93 Difference]: Finished difference Result 2219 states and 6362 transitions. [2020-04-17 18:43:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:43:01,764 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 18:43:01,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:01,780 INFO L225 Difference]: With dead ends: 2219 [2020-04-17 18:43:01,780 INFO L226 Difference]: Without dead ends: 2219 [2020-04-17 18:43:01,780 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:43:01,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2020-04-17 18:43:01,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 2219. [2020-04-17 18:43:01,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2219 states. [2020-04-17 18:43:01,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 6362 transitions. [2020-04-17 18:43:01,846 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 6362 transitions. Word has length 17 [2020-04-17 18:43:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:01,847 INFO L479 AbstractCegarLoop]: Abstraction has 2219 states and 6362 transitions. [2020-04-17 18:43:01,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:43:01,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 6362 transitions. [2020-04-17 18:43:01,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:43:01,847 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:01,848 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:02,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:02,055 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:02,056 INFO L82 PathProgramCache]: Analyzing trace with hash -811477057, now seen corresponding path program 1 times [2020-04-17 18:43:02,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:02,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000311823] [2020-04-17 18:43:02,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:02,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:02,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000311823] [2020-04-17 18:43:02,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80117454] [2020-04-17 18:43:02,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:02,207 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 18:43:02,209 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:02,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:02,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:02,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2020-04-17 18:43:02,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411773165] [2020-04-17 18:43:02,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:43:02,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:02,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:43:02,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:43:02,250 INFO L87 Difference]: Start difference. First operand 2219 states and 6362 transitions. Second operand 12 states. [2020-04-17 18:43:02,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:02,326 INFO L93 Difference]: Finished difference Result 2215 states and 6350 transitions. [2020-04-17 18:43:02,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:43:02,326 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 18:43:02,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:02,342 INFO L225 Difference]: With dead ends: 2215 [2020-04-17 18:43:02,342 INFO L226 Difference]: Without dead ends: 2215 [2020-04-17 18:43:02,343 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:43:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2215 states. [2020-04-17 18:43:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2215 to 2215. [2020-04-17 18:43:02,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2215 states. [2020-04-17 18:43:02,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2215 states to 2215 states and 6350 transitions. [2020-04-17 18:43:02,409 INFO L78 Accepts]: Start accepts. Automaton has 2215 states and 6350 transitions. Word has length 23 [2020-04-17 18:43:02,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:02,410 INFO L479 AbstractCegarLoop]: Abstraction has 2215 states and 6350 transitions. [2020-04-17 18:43:02,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:43:02,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2215 states and 6350 transitions. [2020-04-17 18:43:02,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 18:43:02,412 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:02,412 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:02,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:02,624 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:02,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:02,625 INFO L82 PathProgramCache]: Analyzing trace with hash -346309584, now seen corresponding path program 1 times [2020-04-17 18:43:02,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:02,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941949356] [2020-04-17 18:43:02,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:02,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941949356] [2020-04-17 18:43:02,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558804435] [2020-04-17 18:43:02,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:02,800 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 18:43:02,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:02,866 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:02,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:02,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2020-04-17 18:43:02,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352542526] [2020-04-17 18:43:02,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:43:02,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:02,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:43:02,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:43:02,868 INFO L87 Difference]: Start difference. First operand 2215 states and 6350 transitions. Second operand 14 states. [2020-04-17 18:43:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:02,975 INFO L93 Difference]: Finished difference Result 2207 states and 6322 transitions. [2020-04-17 18:43:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 18:43:02,976 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-04-17 18:43:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:03,016 INFO L225 Difference]: With dead ends: 2207 [2020-04-17 18:43:03,017 INFO L226 Difference]: Without dead ends: 2207 [2020-04-17 18:43:03,017 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:43:03,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2020-04-17 18:43:03,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2207. [2020-04-17 18:43:03,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2207 states. [2020-04-17 18:43:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 6322 transitions. [2020-04-17 18:43:03,112 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 6322 transitions. Word has length 29 [2020-04-17 18:43:03,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:03,114 INFO L479 AbstractCegarLoop]: Abstraction has 2207 states and 6322 transitions. [2020-04-17 18:43:03,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:43:03,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 6322 transitions. [2020-04-17 18:43:03,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-17 18:43:03,118 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:03,118 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:03,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:03,323 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:03,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:03,323 INFO L82 PathProgramCache]: Analyzing trace with hash 107769152, now seen corresponding path program 1 times [2020-04-17 18:43:03,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:03,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740585590] [2020-04-17 18:43:03,324 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:03,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:03,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740585590] [2020-04-17 18:43:03,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132905748] [2020-04-17 18:43:03,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:03,593 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:43:03,595 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:03,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:03,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2020-04-17 18:43:03,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807357135] [2020-04-17 18:43:03,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:43:03,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:03,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:43:03,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:43:03,658 INFO L87 Difference]: Start difference. First operand 2207 states and 6322 transitions. Second operand 16 states. [2020-04-17 18:43:03,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:03,751 INFO L93 Difference]: Finished difference Result 2191 states and 6258 transitions. [2020-04-17 18:43:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:43:03,752 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-04-17 18:43:03,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:03,759 INFO L225 Difference]: With dead ends: 2191 [2020-04-17 18:43:03,759 INFO L226 Difference]: Without dead ends: 2191 [2020-04-17 18:43:03,759 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:43:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2020-04-17 18:43:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 2191. [2020-04-17 18:43:03,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2191 states. [2020-04-17 18:43:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 6258 transitions. [2020-04-17 18:43:03,819 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 6258 transitions. Word has length 35 [2020-04-17 18:43:03,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:03,820 INFO L479 AbstractCegarLoop]: Abstraction has 2191 states and 6258 transitions. [2020-04-17 18:43:03,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:43:03,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 6258 transitions. [2020-04-17 18:43:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-17 18:43:03,822 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:03,822 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:04,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:04,026 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:04,027 INFO L82 PathProgramCache]: Analyzing trace with hash -793168517, now seen corresponding path program 1 times [2020-04-17 18:43:04,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:04,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101711530] [2020-04-17 18:43:04,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:04,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:43:04,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:43:04,069 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 18:43:04,069 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 18:43:04,069 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 18:43:04,070 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 18:43:04,070 WARN L363 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 18:43:04,070 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-04-17 18:43:04,078 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,078 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,079 WARN L315 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,079 WARN L315 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,079 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,079 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,079 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,079 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,079 WARN L315 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,080 WARN L315 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,080 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,080 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,080 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,080 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,080 WARN L315 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,080 WARN L315 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,080 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,081 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,081 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,081 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,081 WARN L315 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,081 WARN L315 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,081 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,082 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,082 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,082 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,082 WARN L315 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,082 WARN L315 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,082 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,082 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,082 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,083 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,083 WARN L315 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,083 WARN L315 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,083 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,083 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,083 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,084 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,084 WARN L315 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,084 WARN L315 ript$VariableManager]: TermVariabe threadThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,085 WARN L315 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,085 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,086 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,086 WARN L315 ript$VariableManager]: TermVariabe threadThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,087 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,087 WARN L315 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,087 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,087 WARN L315 ript$VariableManager]: TermVariabe threadThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,088 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,089 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,089 WARN L315 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,089 WARN L315 ript$VariableManager]: TermVariabe threadThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,090 WARN L315 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,090 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,090 WARN L315 ript$VariableManager]: TermVariabe threadThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,090 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,092 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,092 WARN L315 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,092 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,092 WARN L315 ript$VariableManager]: TermVariabe threadThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:04,097 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 18:43:04,097 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:43:04,097 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:43:04,097 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:43:04,097 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:43:04,097 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:43:04,098 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:43:04,098 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:43:04,098 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:43:04,099 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 114 transitions, 306 flow [2020-04-17 18:43:04,099 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 114 places, 114 transitions, 306 flow [2020-04-17 18:43:04,398 INFO L129 PetriNetUnfolder]: 400/2453 cut-off events. [2020-04-17 18:43:04,398 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-04-17 18:43:04,408 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 2453 events. 400/2453 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 16405 event pairs, 72 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 1365. Up to 192 conditions per place. [2020-04-17 18:43:04,441 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 114 places, 114 transitions, 306 flow [2020-04-17 18:43:04,756 INFO L129 PetriNetUnfolder]: 400/2453 cut-off events. [2020-04-17 18:43:04,756 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-04-17 18:43:04,765 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 2453 events. 400/2453 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 16405 event pairs, 72 based on Foata normal form. 0/2053 useless extension candidates. Maximal degree in co-relation 1365. Up to 192 conditions per place. [2020-04-17 18:43:04,796 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 3144 [2020-04-17 18:43:04,796 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:43:05,403 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:05,443 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:05,446 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:05,479 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:05,479 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:05,480 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:43:05,493 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:05,535 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:05,539 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:05,577 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:05,578 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:05,578 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:43:07,649 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:07,683 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:07,686 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:07,714 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:07,715 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:07,715 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:43:07,724 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:07,754 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:07,757 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:07,786 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:07,787 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:07,788 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:43:09,868 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:09,901 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:09,904 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:09,940 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:09,941 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:09,941 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:43:09,955 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:10,008 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:10,012 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:10,040 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:10,040 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:10,041 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:43:12,155 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:12,202 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:12,206 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:12,244 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:12,244 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:12,245 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:43:12,258 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:12,302 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:12,306 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:12,344 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:12,345 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:12,345 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:43:14,748 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:14,792 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:14,799 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:14,835 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:14,836 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:14,836 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:43:14,846 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:14,884 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:14,888 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:14,919 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:14,920 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:14,920 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:43:17,100 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:17,164 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:17,168 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:17,222 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:17,223 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:17,223 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:43:17,238 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:17,292 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:17,297 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:17,343 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:17,344 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:17,344 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:43:19,989 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-04-17 18:43:20,331 WARN L192 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 92 [2020-04-17 18:43:20,439 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-04-17 18:43:20,444 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2432 [2020-04-17 18:43:20,445 INFO L214 etLargeBlockEncoding]: Total number of compositions: 90 [2020-04-17 18:43:20,445 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 34 transitions, 146 flow [2020-04-17 18:43:20,727 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 6529 states. [2020-04-17 18:43:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states. [2020-04-17 18:43:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 18:43:20,727 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:20,727 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 18:43:20,727 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:20,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:20,728 INFO L82 PathProgramCache]: Analyzing trace with hash 40649002, now seen corresponding path program 1 times [2020-04-17 18:43:20,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:20,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643208550] [2020-04-17 18:43:20,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:20,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643208550] [2020-04-17 18:43:20,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:43:20,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:43:20,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65761605] [2020-04-17 18:43:20,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:43:20,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:20,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:43:20,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:43:20,744 INFO L87 Difference]: Start difference. First operand 6529 states. Second operand 3 states. [2020-04-17 18:43:20,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:20,813 INFO L93 Difference]: Finished difference Result 6529 states and 21447 transitions. [2020-04-17 18:43:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:43:20,814 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 18:43:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:20,840 INFO L225 Difference]: With dead ends: 6529 [2020-04-17 18:43:20,840 INFO L226 Difference]: Without dead ends: 5798 [2020-04-17 18:43:20,841 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:43:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2020-04-17 18:43:21,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5798. [2020-04-17 18:43:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5798 states. [2020-04-17 18:43:21,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5798 states to 5798 states and 19258 transitions. [2020-04-17 18:43:21,026 INFO L78 Accepts]: Start accepts. Automaton has 5798 states and 19258 transitions. Word has length 4 [2020-04-17 18:43:21,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:21,027 INFO L479 AbstractCegarLoop]: Abstraction has 5798 states and 19258 transitions. [2020-04-17 18:43:21,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:43:21,027 INFO L276 IsEmpty]: Start isEmpty. Operand 5798 states and 19258 transitions. [2020-04-17 18:43:21,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:43:21,027 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:21,027 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:21,027 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:21,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:21,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1545227554, now seen corresponding path program 1 times [2020-04-17 18:43:21,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:21,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821712741] [2020-04-17 18:43:21,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:21,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:43:21,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821712741] [2020-04-17 18:43:21,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:43:21,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:43:21,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879154943] [2020-04-17 18:43:21,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:43:21,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:21,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:43:21,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:43:21,054 INFO L87 Difference]: Start difference. First operand 5798 states and 19258 transitions. Second operand 4 states. [2020-04-17 18:43:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:21,110 INFO L93 Difference]: Finished difference Result 6779 states and 21955 transitions. [2020-04-17 18:43:21,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:43:21,110 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 18:43:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:21,134 INFO L225 Difference]: With dead ends: 6779 [2020-04-17 18:43:21,134 INFO L226 Difference]: Without dead ends: 6779 [2020-04-17 18:43:21,135 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:43:21,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2020-04-17 18:43:21,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6397. [2020-04-17 18:43:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6397 states. [2020-04-17 18:43:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6397 states to 6397 states and 20804 transitions. [2020-04-17 18:43:21,343 INFO L78 Accepts]: Start accepts. Automaton has 6397 states and 20804 transitions. Word has length 10 [2020-04-17 18:43:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:21,343 INFO L479 AbstractCegarLoop]: Abstraction has 6397 states and 20804 transitions. [2020-04-17 18:43:21,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:43:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand 6397 states and 20804 transitions. [2020-04-17 18:43:21,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:43:21,343 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:21,344 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:21,344 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:21,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:21,344 INFO L82 PathProgramCache]: Analyzing trace with hash 2077640958, now seen corresponding path program 1 times [2020-04-17 18:43:21,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:21,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972606391] [2020-04-17 18:43:21,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:21,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:21,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972606391] [2020-04-17 18:43:21,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748375677] [2020-04-17 18:43:21,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:21,482 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 18:43:21,483 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:21,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:21,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 18:43:21,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531814103] [2020-04-17 18:43:21,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:43:21,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:21,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:43:21,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:43:21,509 INFO L87 Difference]: Start difference. First operand 6397 states and 20804 transitions. Second operand 10 states. [2020-04-17 18:43:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:21,596 INFO L93 Difference]: Finished difference Result 6395 states and 20799 transitions. [2020-04-17 18:43:21,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:43:21,596 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 18:43:21,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:21,618 INFO L225 Difference]: With dead ends: 6395 [2020-04-17 18:43:21,618 INFO L226 Difference]: Without dead ends: 6395 [2020-04-17 18:43:21,619 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:43:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6395 states. [2020-04-17 18:43:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6395 to 6395. [2020-04-17 18:43:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6395 states. [2020-04-17 18:43:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6395 states to 6395 states and 20799 transitions. [2020-04-17 18:43:21,897 INFO L78 Accepts]: Start accepts. Automaton has 6395 states and 20799 transitions. Word has length 17 [2020-04-17 18:43:21,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:21,897 INFO L479 AbstractCegarLoop]: Abstraction has 6395 states and 20799 transitions. [2020-04-17 18:43:21,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:43:21,897 INFO L276 IsEmpty]: Start isEmpty. Operand 6395 states and 20799 transitions. [2020-04-17 18:43:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:43:21,898 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:21,898 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:22,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:22,102 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:22,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:22,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1893591663, now seen corresponding path program 1 times [2020-04-17 18:43:22,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:22,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820558633] [2020-04-17 18:43:22,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:22,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:22,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820558633] [2020-04-17 18:43:22,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050779999] [2020-04-17 18:43:22,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:22,289 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 18:43:22,295 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:22,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:22,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2020-04-17 18:43:22,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008040889] [2020-04-17 18:43:22,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:43:22,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:22,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:43:22,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:43:22,337 INFO L87 Difference]: Start difference. First operand 6395 states and 20799 transitions. Second operand 12 states. [2020-04-17 18:43:22,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:22,426 INFO L93 Difference]: Finished difference Result 6391 states and 20787 transitions. [2020-04-17 18:43:22,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:43:22,427 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 18:43:22,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:22,452 INFO L225 Difference]: With dead ends: 6391 [2020-04-17 18:43:22,453 INFO L226 Difference]: Without dead ends: 6391 [2020-04-17 18:43:22,453 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:43:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6391 states. [2020-04-17 18:43:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6391 to 6391. [2020-04-17 18:43:22,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6391 states. [2020-04-17 18:43:22,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 20787 transitions. [2020-04-17 18:43:22,696 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 20787 transitions. Word has length 23 [2020-04-17 18:43:22,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:22,697 INFO L479 AbstractCegarLoop]: Abstraction has 6391 states and 20787 transitions. [2020-04-17 18:43:22,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:43:22,697 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 20787 transitions. [2020-04-17 18:43:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 18:43:22,698 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:22,698 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:22,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:22,903 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:22,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:22,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1656058557, now seen corresponding path program 1 times [2020-04-17 18:43:22,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:22,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791284415] [2020-04-17 18:43:22,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:23,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791284415] [2020-04-17 18:43:23,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956348447] [2020-04-17 18:43:23,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:23,097 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 18:43:23,098 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:23,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:23,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2020-04-17 18:43:23,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135878915] [2020-04-17 18:43:23,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:43:23,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:23,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:43:23,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:43:23,159 INFO L87 Difference]: Start difference. First operand 6391 states and 20787 transitions. Second operand 14 states. [2020-04-17 18:43:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:23,246 INFO L93 Difference]: Finished difference Result 6383 states and 20759 transitions. [2020-04-17 18:43:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 18:43:23,247 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-04-17 18:43:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:23,263 INFO L225 Difference]: With dead ends: 6383 [2020-04-17 18:43:23,263 INFO L226 Difference]: Without dead ends: 6383 [2020-04-17 18:43:23,264 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:43:23,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2020-04-17 18:43:23,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 6383. [2020-04-17 18:43:23,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6383 states. [2020-04-17 18:43:23,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 20759 transitions. [2020-04-17 18:43:23,885 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 20759 transitions. Word has length 29 [2020-04-17 18:43:23,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:23,885 INFO L479 AbstractCegarLoop]: Abstraction has 6383 states and 20759 transitions. [2020-04-17 18:43:23,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:43:23,886 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 20759 transitions. [2020-04-17 18:43:23,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-17 18:43:23,888 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:23,888 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:24,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:24,092 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:24,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:24,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1120181460, now seen corresponding path program 1 times [2020-04-17 18:43:24,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:24,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032026347] [2020-04-17 18:43:24,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:24,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032026347] [2020-04-17 18:43:24,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215173472] [2020-04-17 18:43:24,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:24,268 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:43:24,269 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:24,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:24,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2020-04-17 18:43:24,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440206503] [2020-04-17 18:43:24,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:43:24,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:24,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:43:24,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:43:24,336 INFO L87 Difference]: Start difference. First operand 6383 states and 20759 transitions. Second operand 16 states. [2020-04-17 18:43:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:24,454 INFO L93 Difference]: Finished difference Result 6367 states and 20695 transitions. [2020-04-17 18:43:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:43:24,455 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-04-17 18:43:24,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:24,466 INFO L225 Difference]: With dead ends: 6367 [2020-04-17 18:43:24,466 INFO L226 Difference]: Without dead ends: 6367 [2020-04-17 18:43:24,466 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:43:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2020-04-17 18:43:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 6367. [2020-04-17 18:43:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6367 states. [2020-04-17 18:43:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6367 states to 6367 states and 20695 transitions. [2020-04-17 18:43:24,645 INFO L78 Accepts]: Start accepts. Automaton has 6367 states and 20695 transitions. Word has length 35 [2020-04-17 18:43:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:24,646 INFO L479 AbstractCegarLoop]: Abstraction has 6367 states and 20695 transitions. [2020-04-17 18:43:24,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:43:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand 6367 states and 20695 transitions. [2020-04-17 18:43:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-17 18:43:24,652 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:24,653 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:24,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:24,857 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:24,858 INFO L82 PathProgramCache]: Analyzing trace with hash -531586812, now seen corresponding path program 1 times [2020-04-17 18:43:24,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:24,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017034446] [2020-04-17 18:43:24,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:24,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:24,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017034446] [2020-04-17 18:43:24,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318687769] [2020-04-17 18:43:24,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:25,063 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:43:25,064 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:25,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:25,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2020-04-17 18:43:25,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358116505] [2020-04-17 18:43:25,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:43:25,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:25,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:43:25,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:43:25,155 INFO L87 Difference]: Start difference. First operand 6367 states and 20695 transitions. Second operand 18 states. [2020-04-17 18:43:25,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:25,248 INFO L93 Difference]: Finished difference Result 6335 states and 20551 transitions. [2020-04-17 18:43:25,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:43:25,248 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-04-17 18:43:25,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:25,258 INFO L225 Difference]: With dead ends: 6335 [2020-04-17 18:43:25,259 INFO L226 Difference]: Without dead ends: 6335 [2020-04-17 18:43:25,259 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:43:25,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6335 states. [2020-04-17 18:43:25,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6335 to 6335. [2020-04-17 18:43:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6335 states. [2020-04-17 18:43:25,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6335 states to 6335 states and 20551 transitions. [2020-04-17 18:43:25,511 INFO L78 Accepts]: Start accepts. Automaton has 6335 states and 20551 transitions. Word has length 41 [2020-04-17 18:43:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:25,512 INFO L479 AbstractCegarLoop]: Abstraction has 6335 states and 20551 transitions. [2020-04-17 18:43:25,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:43:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6335 states and 20551 transitions. [2020-04-17 18:43:25,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-17 18:43:25,515 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:25,515 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:25,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:25,730 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:25,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:25,731 INFO L82 PathProgramCache]: Analyzing trace with hash -431266190, now seen corresponding path program 1 times [2020-04-17 18:43:25,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:25,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472858022] [2020-04-17 18:43:25,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:43:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:43:25,794 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 18:43:25,794 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 18:43:25,795 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 18:43:25,795 WARN L363 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 18:43:25,796 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-04-17 18:43:25,809 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,809 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,809 WARN L315 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,810 WARN L315 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,810 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,810 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,810 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,810 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,810 WARN L315 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,810 WARN L315 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,811 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,811 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,811 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,811 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,811 WARN L315 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,811 WARN L315 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,811 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,812 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,812 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,812 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,812 WARN L315 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,812 WARN L315 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,812 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,812 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,813 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,813 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,813 WARN L315 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,813 WARN L315 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,813 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,813 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,814 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,814 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,814 WARN L315 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,814 WARN L315 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,814 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,814 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,814 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,815 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,815 WARN L315 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,815 WARN L315 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,815 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,815 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,815 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,816 WARN L315 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,816 WARN L315 ript$VariableManager]: TermVariabe threadThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,816 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,817 WARN L315 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,818 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,818 WARN L315 ript$VariableManager]: TermVariabe threadThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,818 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,819 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,819 WARN L315 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,819 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,820 WARN L315 ript$VariableManager]: TermVariabe threadThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,821 WARN L315 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,821 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,822 WARN L315 ript$VariableManager]: TermVariabe threadThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,822 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,823 WARN L315 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,823 WARN L315 ript$VariableManager]: TermVariabe threadThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,823 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,823 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,824 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,824 WARN L315 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,825 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,825 WARN L315 ript$VariableManager]: TermVariabe threadThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,826 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,826 WARN L315 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,826 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,826 WARN L315 ript$VariableManager]: TermVariabe threadThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:25,832 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 18:43:25,833 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:43:25,833 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:43:25,833 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:43:25,833 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:43:25,833 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:43:25,833 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:43:25,833 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:43:25,833 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:43:25,835 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 120 transitions, 338 flow [2020-04-17 18:43:25,835 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 121 places, 120 transitions, 338 flow [2020-04-17 18:43:26,420 INFO L129 PetriNetUnfolder]: 850/4840 cut-off events. [2020-04-17 18:43:26,420 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-04-17 18:43:26,445 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5338 conditions, 4840 events. 850/4840 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 39298 event pairs, 201 based on Foata normal form. 0/4054 useless extension candidates. Maximal degree in co-relation 2671. Up to 448 conditions per place. [2020-04-17 18:43:26,533 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 121 places, 120 transitions, 338 flow [2020-04-17 18:43:27,159 INFO L129 PetriNetUnfolder]: 850/4840 cut-off events. [2020-04-17 18:43:27,159 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-04-17 18:43:27,183 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5338 conditions, 4840 events. 850/4840 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 39298 event pairs, 201 based on Foata normal form. 0/4054 useless extension candidates. Maximal degree in co-relation 2671. Up to 448 conditions per place. [2020-04-17 18:43:27,263 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 3864 [2020-04-17 18:43:27,264 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:43:27,752 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:27,776 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:27,782 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:27,803 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:27,804 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:27,804 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:134 [2020-04-17 18:43:27,814 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:27,839 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:27,842 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:27,865 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:27,866 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:27,866 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:134 [2020-04-17 18:43:30,144 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:30,182 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:30,185 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:30,213 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:30,214 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:30,214 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:43:30,223 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:30,256 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:30,261 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:30,293 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:30,294 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:30,294 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:43:33,224 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:33,269 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:33,272 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:33,316 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:33,317 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:33,317 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:43:33,330 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:33,370 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:33,376 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:33,415 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:33,416 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:33,416 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:43:35,964 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-04-17 18:43:36,384 WARN L192 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-04-17 18:43:36,500 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-04-17 18:43:36,503 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3124 [2020-04-17 18:43:36,503 INFO L214 etLargeBlockEncoding]: Total number of compositions: 95 [2020-04-17 18:43:36,504 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 37 transitions, 172 flow [2020-04-17 18:43:37,591 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 18897 states. [2020-04-17 18:43:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 18897 states. [2020-04-17 18:43:37,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 18:43:37,591 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:37,591 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 18:43:37,591 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:37,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:37,592 INFO L82 PathProgramCache]: Analyzing trace with hash 47630986, now seen corresponding path program 1 times [2020-04-17 18:43:37,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:37,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76583514] [2020-04-17 18:43:37,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:37,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76583514] [2020-04-17 18:43:37,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:43:37,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:43:37,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94006725] [2020-04-17 18:43:37,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:43:37,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:37,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:43:37,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:43:37,606 INFO L87 Difference]: Start difference. First operand 18897 states. Second operand 3 states. [2020-04-17 18:43:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:37,730 INFO L93 Difference]: Finished difference Result 18897 states and 69116 transitions. [2020-04-17 18:43:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:43:37,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 18:43:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:37,781 INFO L225 Difference]: With dead ends: 18897 [2020-04-17 18:43:37,781 INFO L226 Difference]: Without dead ends: 16708 [2020-04-17 18:43:37,782 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:43:37,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16708 states. [2020-04-17 18:43:38,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16708 to 16708. [2020-04-17 18:43:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16708 states. [2020-04-17 18:43:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16708 states to 16708 states and 61824 transitions. [2020-04-17 18:43:38,154 INFO L78 Accepts]: Start accepts. Automaton has 16708 states and 61824 transitions. Word has length 4 [2020-04-17 18:43:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:38,154 INFO L479 AbstractCegarLoop]: Abstraction has 16708 states and 61824 transitions. [2020-04-17 18:43:38,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:43:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 16708 states and 61824 transitions. [2020-04-17 18:43:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:43:38,154 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:38,154 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:38,154 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:38,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:38,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1252214789, now seen corresponding path program 1 times [2020-04-17 18:43:38,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:38,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497532288] [2020-04-17 18:43:38,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:43:38,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497532288] [2020-04-17 18:43:38,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:43:38,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:43:38,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537720798] [2020-04-17 18:43:38,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:43:38,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:38,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:43:38,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:43:38,189 INFO L87 Difference]: Start difference. First operand 16708 states and 61824 transitions. Second operand 4 states. [2020-04-17 18:43:38,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:38,529 INFO L93 Difference]: Finished difference Result 19531 states and 70840 transitions. [2020-04-17 18:43:38,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:43:38,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 18:43:38,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:38,589 INFO L225 Difference]: With dead ends: 19531 [2020-04-17 18:43:38,589 INFO L226 Difference]: Without dead ends: 19531 [2020-04-17 18:43:38,591 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:43:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19531 states. [2020-04-17 18:43:39,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19531 to 18637. [2020-04-17 18:43:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18637 states. [2020-04-17 18:43:39,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18637 states to 18637 states and 67705 transitions. [2020-04-17 18:43:39,154 INFO L78 Accepts]: Start accepts. Automaton has 18637 states and 67705 transitions. Word has length 10 [2020-04-17 18:43:39,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:39,154 INFO L479 AbstractCegarLoop]: Abstraction has 18637 states and 67705 transitions. [2020-04-17 18:43:39,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:43:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand 18637 states and 67705 transitions. [2020-04-17 18:43:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:43:39,155 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:39,155 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:39,155 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:39,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:39,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1432879296, now seen corresponding path program 1 times [2020-04-17 18:43:39,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:39,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396053065] [2020-04-17 18:43:39,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:39,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396053065] [2020-04-17 18:43:39,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728980347] [2020-04-17 18:43:39,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:39,300 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 18:43:39,301 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:39,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:39,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 18:43:39,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724193466] [2020-04-17 18:43:39,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:43:39,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:39,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:43:39,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:43:39,326 INFO L87 Difference]: Start difference. First operand 18637 states and 67705 transitions. Second operand 10 states. [2020-04-17 18:43:39,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:39,489 INFO L93 Difference]: Finished difference Result 18635 states and 67700 transitions. [2020-04-17 18:43:39,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:43:39,490 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 18:43:39,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:39,546 INFO L225 Difference]: With dead ends: 18635 [2020-04-17 18:43:39,546 INFO L226 Difference]: Without dead ends: 18635 [2020-04-17 18:43:39,546 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:43:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18635 states. [2020-04-17 18:43:41,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18635 to 18635. [2020-04-17 18:43:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18635 states. [2020-04-17 18:43:41,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18635 states to 18635 states and 67700 transitions. [2020-04-17 18:43:41,282 INFO L78 Accepts]: Start accepts. Automaton has 18635 states and 67700 transitions. Word has length 17 [2020-04-17 18:43:41,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:41,283 INFO L479 AbstractCegarLoop]: Abstraction has 18635 states and 67700 transitions. [2020-04-17 18:43:41,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:43:41,283 INFO L276 IsEmpty]: Start isEmpty. Operand 18635 states and 67700 transitions. [2020-04-17 18:43:41,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:43:41,284 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:41,284 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:41,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:41,490 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:41,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:41,490 INFO L82 PathProgramCache]: Analyzing trace with hash -619616742, now seen corresponding path program 1 times [2020-04-17 18:43:41,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:41,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413727631] [2020-04-17 18:43:41,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:41,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413727631] [2020-04-17 18:43:41,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311714946] [2020-04-17 18:43:41,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:41,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:41,639 INFO L264 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 18:43:41,640 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:41,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:41,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2020-04-17 18:43:41,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428428031] [2020-04-17 18:43:41,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:43:41,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:41,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:43:41,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:43:41,686 INFO L87 Difference]: Start difference. First operand 18635 states and 67700 transitions. Second operand 12 states. [2020-04-17 18:43:41,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:41,818 INFO L93 Difference]: Finished difference Result 18631 states and 67688 transitions. [2020-04-17 18:43:41,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:43:41,818 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 18:43:41,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:41,854 INFO L225 Difference]: With dead ends: 18631 [2020-04-17 18:43:41,855 INFO L226 Difference]: Without dead ends: 18631 [2020-04-17 18:43:41,855 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:43:41,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18631 states. [2020-04-17 18:43:42,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18631 to 18631. [2020-04-17 18:43:42,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18631 states. [2020-04-17 18:43:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18631 states to 18631 states and 67688 transitions. [2020-04-17 18:43:42,478 INFO L78 Accepts]: Start accepts. Automaton has 18631 states and 67688 transitions. Word has length 23 [2020-04-17 18:43:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:42,479 INFO L479 AbstractCegarLoop]: Abstraction has 18631 states and 67688 transitions. [2020-04-17 18:43:42,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:43:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 18631 states and 67688 transitions. [2020-04-17 18:43:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 18:43:42,480 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:42,480 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:42,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:42,681 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:42,681 INFO L82 PathProgramCache]: Analyzing trace with hash 872252755, now seen corresponding path program 1 times [2020-04-17 18:43:42,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:42,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391041518] [2020-04-17 18:43:42,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:42,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391041518] [2020-04-17 18:43:42,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383578023] [2020-04-17 18:43:42,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:42,845 INFO L264 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 18:43:42,845 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:42,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:42,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2020-04-17 18:43:42,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992674010] [2020-04-17 18:43:42,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:43:42,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:42,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:43:42,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:43:42,910 INFO L87 Difference]: Start difference. First operand 18631 states and 67688 transitions. Second operand 14 states. [2020-04-17 18:43:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:43,031 INFO L93 Difference]: Finished difference Result 18623 states and 67660 transitions. [2020-04-17 18:43:43,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 18:43:43,031 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-04-17 18:43:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:43,068 INFO L225 Difference]: With dead ends: 18623 [2020-04-17 18:43:43,068 INFO L226 Difference]: Without dead ends: 18623 [2020-04-17 18:43:43,069 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:43:43,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18623 states. [2020-04-17 18:43:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18623 to 18623. [2020-04-17 18:43:43,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18623 states. [2020-04-17 18:43:43,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18623 states to 18623 states and 67660 transitions. [2020-04-17 18:43:43,472 INFO L78 Accepts]: Start accepts. Automaton has 18623 states and 67660 transitions. Word has length 29 [2020-04-17 18:43:43,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:43,473 INFO L479 AbstractCegarLoop]: Abstraction has 18623 states and 67660 transitions. [2020-04-17 18:43:43,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:43:43,473 INFO L276 IsEmpty]: Start isEmpty. Operand 18623 states and 67660 transitions. [2020-04-17 18:43:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-17 18:43:43,474 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:43,474 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:43,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:43,675 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:43,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:43,675 INFO L82 PathProgramCache]: Analyzing trace with hash -603243733, now seen corresponding path program 1 times [2020-04-17 18:43:43,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:43,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477942099] [2020-04-17 18:43:43,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:43,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477942099] [2020-04-17 18:43:43,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693863658] [2020-04-17 18:43:43,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:43,858 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:43:43,858 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:44,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:44,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2020-04-17 18:43:44,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983390194] [2020-04-17 18:43:44,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:43:44,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:44,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:43:44,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:43:44,231 INFO L87 Difference]: Start difference. First operand 18623 states and 67660 transitions. Second operand 16 states. [2020-04-17 18:43:44,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:44,404 INFO L93 Difference]: Finished difference Result 18607 states and 67596 transitions. [2020-04-17 18:43:44,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:43:44,404 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-04-17 18:43:44,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:44,439 INFO L225 Difference]: With dead ends: 18607 [2020-04-17 18:43:44,439 INFO L226 Difference]: Without dead ends: 18607 [2020-04-17 18:43:44,440 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:43:44,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18607 states. [2020-04-17 18:43:44,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18607 to 18607. [2020-04-17 18:43:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18607 states. [2020-04-17 18:43:44,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18607 states to 18607 states and 67596 transitions. [2020-04-17 18:43:44,820 INFO L78 Accepts]: Start accepts. Automaton has 18607 states and 67596 transitions. Word has length 35 [2020-04-17 18:43:44,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:44,820 INFO L479 AbstractCegarLoop]: Abstraction has 18607 states and 67596 transitions. [2020-04-17 18:43:44,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:43:44,821 INFO L276 IsEmpty]: Start isEmpty. Operand 18607 states and 67596 transitions. [2020-04-17 18:43:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-17 18:43:44,824 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:44,824 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:45,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:45,025 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:45,025 INFO L82 PathProgramCache]: Analyzing trace with hash -131017630, now seen corresponding path program 1 times [2020-04-17 18:43:45,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:45,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993668882] [2020-04-17 18:43:45,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:45,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993668882] [2020-04-17 18:43:45,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545819103] [2020-04-17 18:43:45,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:45,220 INFO L264 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:43:45,221 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:45,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:45,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2020-04-17 18:43:45,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885155122] [2020-04-17 18:43:45,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:43:45,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:43:45,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:43:45,298 INFO L87 Difference]: Start difference. First operand 18607 states and 67596 transitions. Second operand 18 states. [2020-04-17 18:43:45,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:45,508 INFO L93 Difference]: Finished difference Result 18575 states and 67452 transitions. [2020-04-17 18:43:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:43:45,508 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-04-17 18:43:45,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:45,557 INFO L225 Difference]: With dead ends: 18575 [2020-04-17 18:43:45,558 INFO L226 Difference]: Without dead ends: 18575 [2020-04-17 18:43:45,558 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:43:45,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18575 states. [2020-04-17 18:43:46,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18575 to 18575. [2020-04-17 18:43:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18575 states. [2020-04-17 18:43:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18575 states to 18575 states and 67452 transitions. [2020-04-17 18:43:46,219 INFO L78 Accepts]: Start accepts. Automaton has 18575 states and 67452 transitions. Word has length 41 [2020-04-17 18:43:46,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:46,219 INFO L479 AbstractCegarLoop]: Abstraction has 18575 states and 67452 transitions. [2020-04-17 18:43:46,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:43:46,219 INFO L276 IsEmpty]: Start isEmpty. Operand 18575 states and 67452 transitions. [2020-04-17 18:43:46,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-17 18:43:46,227 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:46,227 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:46,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:46,431 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:46,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:46,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1557656136, now seen corresponding path program 1 times [2020-04-17 18:43:46,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:46,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144168540] [2020-04-17 18:43:46,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:46,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:43:46,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144168540] [2020-04-17 18:43:46,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521686597] [2020-04-17 18:43:46,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-04-17 18:43:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:43:46,657 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:43:46,658 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:43:46,750 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:43:46,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:43:46,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 19 [2020-04-17 18:43:46,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525256928] [2020-04-17 18:43:46,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:43:46,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:43:46,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:43:46,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:43:46,751 INFO L87 Difference]: Start difference. First operand 18575 states and 67452 transitions. Second operand 20 states. [2020-04-17 18:43:46,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:43:46,910 INFO L93 Difference]: Finished difference Result 18511 states and 67132 transitions. [2020-04-17 18:43:46,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:43:46,910 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-04-17 18:43:46,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:43:46,946 INFO L225 Difference]: With dead ends: 18511 [2020-04-17 18:43:46,947 INFO L226 Difference]: Without dead ends: 18511 [2020-04-17 18:43:46,947 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:43:47,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18511 states. [2020-04-17 18:43:47,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18511 to 18511. [2020-04-17 18:43:47,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18511 states. [2020-04-17 18:43:47,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18511 states to 18511 states and 67132 transitions. [2020-04-17 18:43:47,313 INFO L78 Accepts]: Start accepts. Automaton has 18511 states and 67132 transitions. Word has length 47 [2020-04-17 18:43:47,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:43:47,313 INFO L479 AbstractCegarLoop]: Abstraction has 18511 states and 67132 transitions. [2020-04-17 18:43:47,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:43:47,314 INFO L276 IsEmpty]: Start isEmpty. Operand 18511 states and 67132 transitions. [2020-04-17 18:43:47,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-17 18:43:47,316 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:43:47,316 INFO L425 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:43:47,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:43:47,517 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:43:47,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:43:47,518 INFO L82 PathProgramCache]: Analyzing trace with hash 230242214, now seen corresponding path program 1 times [2020-04-17 18:43:47,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:43:47,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740872372] [2020-04-17 18:43:47,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:43:47,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:43:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:43:47,556 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 18:43:47,557 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 18:43:47,557 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 18:43:47,557 WARN L363 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 18:43:47,557 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2020-04-17 18:43:47,846 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,846 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,846 WARN L315 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,846 WARN L315 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,846 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,847 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,847 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,847 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,847 WARN L315 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,847 WARN L315 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,847 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,848 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,848 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,848 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,851 WARN L315 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,851 WARN L315 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,851 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,852 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,852 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,852 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,852 WARN L315 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,852 WARN L315 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,852 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,853 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,853 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,853 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,853 WARN L315 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,854 WARN L315 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,854 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,854 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,854 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,854 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,854 WARN L315 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,855 WARN L315 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,855 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,857 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,857 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,857 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,857 WARN L315 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,857 WARN L315 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,858 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,858 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,858 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,858 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,858 WARN L315 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,858 WARN L315 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,858 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,858 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,858 WARN L315 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,859 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,859 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,859 WARN L315 ript$VariableManager]: TermVariabe threadThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,863 WARN L315 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,863 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,863 WARN L315 ript$VariableManager]: TermVariabe threadThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,863 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,864 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,865 WARN L315 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,865 WARN L315 ript$VariableManager]: TermVariabe threadThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,865 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,866 WARN L315 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,866 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,866 WARN L315 ript$VariableManager]: TermVariabe threadThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,867 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,868 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,868 WARN L315 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,868 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,868 WARN L315 ript$VariableManager]: TermVariabe threadThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,869 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,870 WARN L315 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,870 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,870 WARN L315 ript$VariableManager]: TermVariabe threadThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,871 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,871 WARN L315 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,871 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,872 WARN L315 ript$VariableManager]: TermVariabe threadThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,873 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,873 WARN L315 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,873 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,873 WARN L315 ript$VariableManager]: TermVariabe threadThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:43:47,880 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 18:43:47,880 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:43:47,880 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:43:47,881 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:43:47,881 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:43:47,881 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:43:47,881 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:43:47,881 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:43:47,881 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:43:47,882 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 126 transitions, 372 flow [2020-04-17 18:43:47,883 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 128 places, 126 transitions, 372 flow [2020-04-17 18:43:48,896 INFO L129 PetriNetUnfolder]: 1812/9659 cut-off events. [2020-04-17 18:43:48,896 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-04-17 18:43:48,947 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10744 conditions, 9659 events. 1812/9659 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 92403 event pairs, 522 based on Foata normal form. 0/8103 useless extension candidates. Maximal degree in co-relation 5322. Up to 1024 conditions per place. [2020-04-17 18:43:49,142 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 128 places, 126 transitions, 372 flow [2020-04-17 18:43:49,948 INFO L129 PetriNetUnfolder]: 1812/9659 cut-off events. [2020-04-17 18:43:49,948 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-04-17 18:43:49,982 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10744 conditions, 9659 events. 1812/9659 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 92403 event pairs, 522 based on Foata normal form. 0/8103 useless extension candidates. Maximal degree in co-relation 5322. Up to 1024 conditions per place. [2020-04-17 18:43:50,092 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 4640 [2020-04-17 18:43:50,092 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:43:50,263 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:50,287 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:50,291 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:50,314 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:50,314 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:50,315 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:134 [2020-04-17 18:43:50,330 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:50,358 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:50,362 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:50,386 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:50,386 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:50,387 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:132, output treesize:134 [2020-04-17 18:43:53,514 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:53,547 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:53,550 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:53,580 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:53,580 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:53,581 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:43:53,592 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:53,632 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:53,636 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:53,666 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:53,667 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:53,667 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:43:56,269 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:56,341 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:56,346 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:56,409 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:56,410 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:56,410 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:43:56,426 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:56,498 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:56,503 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:56,576 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:56,577 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:56,577 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:43:58,863 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:58,905 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:58,915 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:58,952 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:58,953 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:58,953 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:43:58,962 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:59,001 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:59,004 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:59,051 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:43:59,051 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:43:59,052 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:44:01,542 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-04-17 18:44:01,650 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-04-17 18:44:02,136 WARN L192 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 94 [2020-04-17 18:44:02,251 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-04-17 18:44:02,269 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3851 [2020-04-17 18:44:02,269 INFO L214 etLargeBlockEncoding]: Total number of compositions: 98 [2020-04-17 18:44:02,269 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 40 transitions, 200 flow [2020-04-17 18:44:08,738 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 55297 states. [2020-04-17 18:44:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 55297 states. [2020-04-17 18:44:08,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 18:44:08,738 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:08,738 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 18:44:08,739 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:08,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:08,739 INFO L82 PathProgramCache]: Analyzing trace with hash 54894463, now seen corresponding path program 1 times [2020-04-17 18:44:08,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:08,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10849180] [2020-04-17 18:44:08,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:08,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:08,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10849180] [2020-04-17 18:44:08,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:44:08,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:44:08,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389824878] [2020-04-17 18:44:08,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:44:08,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:08,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:44:08,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:44:08,764 INFO L87 Difference]: Start difference. First operand 55297 states. Second operand 3 states. [2020-04-17 18:44:09,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:09,030 INFO L93 Difference]: Finished difference Result 55297 states and 222749 transitions. [2020-04-17 18:44:09,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:44:09,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 18:44:09,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:09,154 INFO L225 Difference]: With dead ends: 55297 [2020-04-17 18:44:09,155 INFO L226 Difference]: Without dead ends: 48734 [2020-04-17 18:44:09,155 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:44:10,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48734 states. [2020-04-17 18:44:10,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48734 to 48734. [2020-04-17 18:44:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48734 states. [2020-04-17 18:44:10,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48734 states to 48734 states and 198690 transitions. [2020-04-17 18:44:10,875 INFO L78 Accepts]: Start accepts. Automaton has 48734 states and 198690 transitions. Word has length 4 [2020-04-17 18:44:10,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:10,876 INFO L479 AbstractCegarLoop]: Abstraction has 48734 states and 198690 transitions. [2020-04-17 18:44:10,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-17 18:44:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 48734 states and 198690 transitions. [2020-04-17 18:44:10,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-04-17 18:44:10,876 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:10,876 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:10,876 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:10,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:10,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1411257051, now seen corresponding path program 1 times [2020-04-17 18:44:10,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:10,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905342822] [2020-04-17 18:44:10,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-04-17 18:44:10,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905342822] [2020-04-17 18:44:10,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:44:10,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-17 18:44:10,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071873851] [2020-04-17 18:44:10,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-04-17 18:44:10,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:10,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-04-17 18:44:10,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:44:10,907 INFO L87 Difference]: Start difference. First operand 48734 states and 198690 transitions. Second operand 4 states. [2020-04-17 18:44:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:11,165 INFO L93 Difference]: Finished difference Result 56827 states and 227865 transitions. [2020-04-17 18:44:11,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:44:11,166 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-04-17 18:44:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:14,025 INFO L225 Difference]: With dead ends: 56827 [2020-04-17 18:44:14,025 INFO L226 Difference]: Without dead ends: 56827 [2020-04-17 18:44:14,026 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-04-17 18:44:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56827 states. [2020-04-17 18:44:15,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56827 to 54781. [2020-04-17 18:44:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54781 states. [2020-04-17 18:44:15,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54781 states to 54781 states and 219674 transitions. [2020-04-17 18:44:15,558 INFO L78 Accepts]: Start accepts. Automaton has 54781 states and 219674 transitions. Word has length 10 [2020-04-17 18:44:15,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:15,558 INFO L479 AbstractCegarLoop]: Abstraction has 54781 states and 219674 transitions. [2020-04-17 18:44:15,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-04-17 18:44:15,558 INFO L276 IsEmpty]: Start isEmpty. Operand 54781 states and 219674 transitions. [2020-04-17 18:44:15,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-04-17 18:44:15,558 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:15,558 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:15,558 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:15,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:15,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1775097937, now seen corresponding path program 1 times [2020-04-17 18:44:15,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:15,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773144236] [2020-04-17 18:44:15,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:15,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773144236] [2020-04-17 18:44:15,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42459769] [2020-04-17 18:44:15,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:18,546 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-17 18:44:18,546 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:44:18,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:18,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 9 [2020-04-17 18:44:18,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335993022] [2020-04-17 18:44:18,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-04-17 18:44:18,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:18,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-04-17 18:44:18,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:44:18,567 INFO L87 Difference]: Start difference. First operand 54781 states and 219674 transitions. Second operand 10 states. [2020-04-17 18:44:18,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:18,862 INFO L93 Difference]: Finished difference Result 54779 states and 219669 transitions. [2020-04-17 18:44:18,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-04-17 18:44:18,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-04-17 18:44:18,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:18,996 INFO L225 Difference]: With dead ends: 54779 [2020-04-17 18:44:18,996 INFO L226 Difference]: Without dead ends: 54779 [2020-04-17 18:44:18,996 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-04-17 18:44:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54779 states. [2020-04-17 18:44:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54779 to 54779. [2020-04-17 18:44:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54779 states. [2020-04-17 18:44:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54779 states to 54779 states and 219669 transitions. [2020-04-17 18:44:21,353 INFO L78 Accepts]: Start accepts. Automaton has 54779 states and 219669 transitions. Word has length 17 [2020-04-17 18:44:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:21,354 INFO L479 AbstractCegarLoop]: Abstraction has 54779 states and 219669 transitions. [2020-04-17 18:44:21,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-04-17 18:44:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 54779 states and 219669 transitions. [2020-04-17 18:44:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-04-17 18:44:21,354 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:21,354 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:21,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:21,555 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:21,555 INFO L82 PathProgramCache]: Analyzing trace with hash 911691700, now seen corresponding path program 1 times [2020-04-17 18:44:21,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:21,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336402216] [2020-04-17 18:44:21,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:21,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336402216] [2020-04-17 18:44:21,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418522407] [2020-04-17 18:44:21,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:21,711 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2020-04-17 18:44:21,712 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:44:21,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:21,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2020-04-17 18:44:21,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481552288] [2020-04-17 18:44:21,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-17 18:44:21,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:21,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-17 18:44:21,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:44:21,746 INFO L87 Difference]: Start difference. First operand 54779 states and 219669 transitions. Second operand 12 states. [2020-04-17 18:44:22,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:22,046 INFO L93 Difference]: Finished difference Result 54775 states and 219657 transitions. [2020-04-17 18:44:22,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-04-17 18:44:22,046 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-04-17 18:44:22,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:22,185 INFO L225 Difference]: With dead ends: 54775 [2020-04-17 18:44:22,185 INFO L226 Difference]: Without dead ends: 54775 [2020-04-17 18:44:22,185 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-04-17 18:44:22,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54775 states. [2020-04-17 18:44:23,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54775 to 54775. [2020-04-17 18:44:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54775 states. [2020-04-17 18:44:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54775 states to 54775 states and 219657 transitions. [2020-04-17 18:44:27,146 INFO L78 Accepts]: Start accepts. Automaton has 54775 states and 219657 transitions. Word has length 23 [2020-04-17 18:44:27,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:27,147 INFO L479 AbstractCegarLoop]: Abstraction has 54775 states and 219657 transitions. [2020-04-17 18:44:27,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-17 18:44:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 54775 states and 219657 transitions. [2020-04-17 18:44:27,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-04-17 18:44:27,147 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:27,147 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:27,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:27,349 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:27,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1882146136, now seen corresponding path program 1 times [2020-04-17 18:44:27,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:27,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120602678] [2020-04-17 18:44:27,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:27,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120602678] [2020-04-17 18:44:27,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609271407] [2020-04-17 18:44:27,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:27,531 INFO L264 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-17 18:44:27,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:44:27,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:27,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2020-04-17 18:44:27,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672836561] [2020-04-17 18:44:27,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-04-17 18:44:27,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:27,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-04-17 18:44:27,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:44:27,589 INFO L87 Difference]: Start difference. First operand 54775 states and 219657 transitions. Second operand 14 states. [2020-04-17 18:44:27,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:27,900 INFO L93 Difference]: Finished difference Result 54767 states and 219629 transitions. [2020-04-17 18:44:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-04-17 18:44:27,901 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-04-17 18:44:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:28,049 INFO L225 Difference]: With dead ends: 54767 [2020-04-17 18:44:28,049 INFO L226 Difference]: Without dead ends: 54767 [2020-04-17 18:44:28,049 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-04-17 18:44:28,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54767 states. [2020-04-17 18:44:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54767 to 54767. [2020-04-17 18:44:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54767 states. [2020-04-17 18:44:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54767 states to 54767 states and 219629 transitions. [2020-04-17 18:44:30,264 INFO L78 Accepts]: Start accepts. Automaton has 54767 states and 219629 transitions. Word has length 29 [2020-04-17 18:44:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:30,264 INFO L479 AbstractCegarLoop]: Abstraction has 54767 states and 219629 transitions. [2020-04-17 18:44:30,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-04-17 18:44:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 54767 states and 219629 transitions. [2020-04-17 18:44:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-04-17 18:44:30,266 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:30,266 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:30,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:30,467 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:30,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:30,467 INFO L82 PathProgramCache]: Analyzing trace with hash -290777765, now seen corresponding path program 1 times [2020-04-17 18:44:30,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:30,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081576248] [2020-04-17 18:44:30,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:30,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081576248] [2020-04-17 18:44:30,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265328181] [2020-04-17 18:44:30,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:30,661 INFO L264 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2020-04-17 18:44:30,662 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:44:30,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:30,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2020-04-17 18:44:30,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497531543] [2020-04-17 18:44:30,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-04-17 18:44:30,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-04-17 18:44:30,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:44:30,731 INFO L87 Difference]: Start difference. First operand 54767 states and 219629 transitions. Second operand 16 states. [2020-04-17 18:44:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:31,039 INFO L93 Difference]: Finished difference Result 54751 states and 219565 transitions. [2020-04-17 18:44:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-04-17 18:44:31,039 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-04-17 18:44:31,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:31,171 INFO L225 Difference]: With dead ends: 54751 [2020-04-17 18:44:31,171 INFO L226 Difference]: Without dead ends: 54751 [2020-04-17 18:44:31,171 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-04-17 18:44:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54751 states. [2020-04-17 18:44:32,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54751 to 54751. [2020-04-17 18:44:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54751 states. [2020-04-17 18:44:33,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54751 states to 54751 states and 219565 transitions. [2020-04-17 18:44:33,619 INFO L78 Accepts]: Start accepts. Automaton has 54751 states and 219565 transitions. Word has length 35 [2020-04-17 18:44:33,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:33,619 INFO L479 AbstractCegarLoop]: Abstraction has 54751 states and 219565 transitions. [2020-04-17 18:44:33,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-04-17 18:44:33,619 INFO L276 IsEmpty]: Start isEmpty. Operand 54751 states and 219565 transitions. [2020-04-17 18:44:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-04-17 18:44:33,621 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:33,622 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:33,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:33,823 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:33,824 INFO L82 PathProgramCache]: Analyzing trace with hash 460274813, now seen corresponding path program 1 times [2020-04-17 18:44:33,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:33,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311370008] [2020-04-17 18:44:33,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:33,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311370008] [2020-04-17 18:44:33,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207450844] [2020-04-17 18:44:33,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:34,065 INFO L264 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-17 18:44:34,066 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:44:34,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:34,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2020-04-17 18:44:34,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977736355] [2020-04-17 18:44:34,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-04-17 18:44:34,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:34,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-04-17 18:44:34,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:44:34,181 INFO L87 Difference]: Start difference. First operand 54751 states and 219565 transitions. Second operand 18 states. [2020-04-17 18:44:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:34,617 INFO L93 Difference]: Finished difference Result 54719 states and 219421 transitions. [2020-04-17 18:44:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-04-17 18:44:34,617 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-04-17 18:44:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:34,751 INFO L225 Difference]: With dead ends: 54719 [2020-04-17 18:44:34,751 INFO L226 Difference]: Without dead ends: 54719 [2020-04-17 18:44:34,751 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-04-17 18:44:35,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54719 states. [2020-04-17 18:44:36,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54719 to 54719. [2020-04-17 18:44:36,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54719 states. [2020-04-17 18:44:40,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54719 states to 54719 states and 219421 transitions. [2020-04-17 18:44:40,304 INFO L78 Accepts]: Start accepts. Automaton has 54719 states and 219421 transitions. Word has length 41 [2020-04-17 18:44:40,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:40,304 INFO L479 AbstractCegarLoop]: Abstraction has 54719 states and 219421 transitions. [2020-04-17 18:44:40,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-04-17 18:44:40,304 INFO L276 IsEmpty]: Start isEmpty. Operand 54719 states and 219421 transitions. [2020-04-17 18:44:40,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-04-17 18:44:40,308 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:40,309 INFO L425 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:40,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:40,509 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:40,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:40,510 INFO L82 PathProgramCache]: Analyzing trace with hash -964712578, now seen corresponding path program 1 times [2020-04-17 18:44:40,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:40,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042159792] [2020-04-17 18:44:40,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:40,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042159792] [2020-04-17 18:44:40,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341884396] [2020-04-17 18:44:40,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:40,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:40,744 INFO L264 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2020-04-17 18:44:40,745 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:44:40,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:40,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 19 [2020-04-17 18:44:40,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556493998] [2020-04-17 18:44:40,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-04-17 18:44:40,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:40,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-04-17 18:44:40,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:44:40,840 INFO L87 Difference]: Start difference. First operand 54719 states and 219421 transitions. Second operand 20 states. [2020-04-17 18:44:41,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:41,180 INFO L93 Difference]: Finished difference Result 54655 states and 219101 transitions. [2020-04-17 18:44:41,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-04-17 18:44:41,180 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 47 [2020-04-17 18:44:41,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:41,319 INFO L225 Difference]: With dead ends: 54655 [2020-04-17 18:44:41,319 INFO L226 Difference]: Without dead ends: 54655 [2020-04-17 18:44:41,319 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-04-17 18:44:42,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54655 states. [2020-04-17 18:44:42,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54655 to 54655. [2020-04-17 18:44:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54655 states. [2020-04-17 18:44:43,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54655 states to 54655 states and 219101 transitions. [2020-04-17 18:44:43,435 INFO L78 Accepts]: Start accepts. Automaton has 54655 states and 219101 transitions. Word has length 47 [2020-04-17 18:44:43,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:43,436 INFO L479 AbstractCegarLoop]: Abstraction has 54655 states and 219101 transitions. [2020-04-17 18:44:43,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-04-17 18:44:43,436 INFO L276 IsEmpty]: Start isEmpty. Operand 54655 states and 219101 transitions. [2020-04-17 18:44:43,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-04-17 18:44:43,445 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:43,445 INFO L425 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:43,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:43,647 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:43,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:43,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1558950686, now seen corresponding path program 1 times [2020-04-17 18:44:43,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:43,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982584611] [2020-04-17 18:44:43,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:44:43,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982584611] [2020-04-17 18:44:43,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577203265] [2020-04-17 18:44:43,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:44:43,883 INFO L264 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-17 18:44:43,884 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-17 18:44:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-17 18:44:44,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-17 18:44:44,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 21 [2020-04-17 18:44:44,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823474149] [2020-04-17 18:44:44,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-04-17 18:44:44,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:44:44,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-04-17 18:44:44,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:44:44,021 INFO L87 Difference]: Start difference. First operand 54655 states and 219101 transitions. Second operand 22 states. [2020-04-17 18:44:44,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:44:44,361 INFO L93 Difference]: Finished difference Result 54527 states and 218397 transitions. [2020-04-17 18:44:44,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-04-17 18:44:44,362 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 53 [2020-04-17 18:44:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:44:44,496 INFO L225 Difference]: With dead ends: 54527 [2020-04-17 18:44:44,496 INFO L226 Difference]: Without dead ends: 54527 [2020-04-17 18:44:44,497 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2020-04-17 18:44:45,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54527 states. [2020-04-17 18:44:45,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54527 to 54527. [2020-04-17 18:44:45,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54527 states. [2020-04-17 18:44:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54527 states to 54527 states and 218397 transitions. [2020-04-17 18:44:46,027 INFO L78 Accepts]: Start accepts. Automaton has 54527 states and 218397 transitions. Word has length 53 [2020-04-17 18:44:46,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-17 18:44:46,027 INFO L479 AbstractCegarLoop]: Abstraction has 54527 states and 218397 transitions. [2020-04-17 18:44:46,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-04-17 18:44:46,027 INFO L276 IsEmpty]: Start isEmpty. Operand 54527 states and 218397 transitions. [2020-04-17 18:44:46,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-04-17 18:44:46,033 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:44:46,033 INFO L425 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-17 18:44:46,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-17 18:44:46,234 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:44:46,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:44:46,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1378182391, now seen corresponding path program 1 times [2020-04-17 18:44:46,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:44:46,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189109945] [2020-04-17 18:44:46,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:44:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:44:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-04-17 18:44:46,282 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-04-17 18:44:46,282 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-04-17 18:44:46,283 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-04-17 18:44:46,283 WARN L363 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2020-04-17 18:44:46,283 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2020-04-17 18:44:46,294 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,294 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,294 WARN L315 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,294 WARN L315 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,295 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,295 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,295 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,295 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,295 WARN L315 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,295 WARN L315 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,296 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,296 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,296 WARN L315 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,296 WARN L315 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,296 WARN L315 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,296 WARN L315 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,296 WARN L315 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,296 WARN L315 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,296 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,297 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,297 WARN L315 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,297 WARN L315 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,297 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,297 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,297 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,297 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,297 WARN L315 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,297 WARN L315 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,298 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,298 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,298 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,298 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,298 WARN L315 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,298 WARN L315 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,298 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,299 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,299 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,299 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,299 WARN L315 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,299 WARN L315 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,299 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,299 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,299 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,300 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,300 WARN L315 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,300 WARN L315 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,300 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,300 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,300 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,300 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,301 WARN L315 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,301 WARN L315 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,301 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,301 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,301 WARN L315 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,302 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,302 WARN L315 ript$VariableManager]: TermVariabe threadThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,302 WARN L315 ript$VariableManager]: TermVariabe |threadThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,303 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,303 WARN L315 ript$VariableManager]: TermVariabe |threadThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,303 WARN L315 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,304 WARN L315 ript$VariableManager]: TermVariabe threadThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,305 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,305 WARN L315 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,305 WARN L315 ript$VariableManager]: TermVariabe |threadThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,305 WARN L315 ript$VariableManager]: TermVariabe threadThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,306 WARN L315 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,306 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,306 WARN L315 ript$VariableManager]: TermVariabe |threadThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,307 WARN L315 ript$VariableManager]: TermVariabe threadThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,308 WARN L315 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,308 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,308 WARN L315 ript$VariableManager]: TermVariabe |threadThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,308 WARN L315 ript$VariableManager]: TermVariabe threadThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,309 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,309 WARN L315 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,309 WARN L315 ript$VariableManager]: TermVariabe |threadThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,309 WARN L315 ript$VariableManager]: TermVariabe threadThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,311 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,311 WARN L315 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,311 WARN L315 ript$VariableManager]: TermVariabe |threadThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,311 WARN L315 ript$VariableManager]: TermVariabe threadThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,313 WARN L315 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,314 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,314 WARN L315 ript$VariableManager]: TermVariabe threadThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,314 WARN L315 ript$VariableManager]: TermVariabe |threadThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,315 WARN L315 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,315 WARN L315 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,315 WARN L315 ript$VariableManager]: TermVariabe threadThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,316 WARN L315 ript$VariableManager]: TermVariabe |threadThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-17 18:44:46,327 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-04-17 18:44:46,328 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-17 18:44:46,328 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-17 18:44:46,328 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-17 18:44:46,328 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-17 18:44:46,328 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-17 18:44:46,328 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-17 18:44:46,328 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-17 18:44:46,328 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-17 18:44:46,330 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 132 transitions, 408 flow [2020-04-17 18:44:46,330 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 408 flow [2020-04-17 18:44:48,544 INFO L129 PetriNetUnfolder]: 3862/19406 cut-off events. [2020-04-17 18:44:48,544 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-04-17 18:44:48,657 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21783 conditions, 19406 events. 3862/19406 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 214634 event pairs, 1291 based on Foata normal form. 0/16312 useless extension candidates. Maximal degree in co-relation 10726. Up to 2304 conditions per place. [2020-04-17 18:44:49,010 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 408 flow [2020-04-17 18:44:51,086 INFO L129 PetriNetUnfolder]: 3862/19406 cut-off events. [2020-04-17 18:44:51,086 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-04-17 18:44:51,173 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21783 conditions, 19406 events. 3862/19406 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 214634 event pairs, 1291 based on Foata normal form. 0/16312 useless extension candidates. Maximal degree in co-relation 10726. Up to 2304 conditions per place. [2020-04-17 18:44:51,499 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 5472 [2020-04-17 18:44:51,499 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-04-17 18:44:52,567 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:52,597 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:44:52,601 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:52,631 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:44:52,632 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:52,632 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:44:52,641 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:52,672 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:44:52,683 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:52,710 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:44:52,711 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:52,711 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:138, output treesize:140 [2020-04-17 18:44:55,394 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:55,437 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:44:55,441 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:55,484 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:44:55,485 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:55,485 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:44:55,494 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:55,535 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:44:55,538 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:55,575 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:44:55,575 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:55,576 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:44:58,027 WARN L192 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-04-17 18:44:58,232 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:58,272 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:44:58,277 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:58,316 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:44:58,317 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:58,317 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:44:58,327 INFO L539 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:58,369 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:44:58,373 INFO L539 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:58,409 INFO L619 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-04-17 18:44:58,409 INFO L539 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-04-17 18:44:58,410 INFO L239 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:144, output treesize:146 [2020-04-17 18:45:00,666 WARN L192 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 92 [2020-04-17 18:45:00,789 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-04-17 18:45:01,039 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 90 [2020-04-17 18:45:01,159 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-04-17 18:45:01,163 INFO L206 etLargeBlockEncoding]: Checked pairs total: 4378 [2020-04-17 18:45:01,163 INFO L214 etLargeBlockEncoding]: Total number of compositions: 98 [2020-04-17 18:45:01,163 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 43 transitions, 230 flow [2020-04-17 18:45:44,591 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 163089 states. [2020-04-17 18:45:44,592 INFO L276 IsEmpty]: Start isEmpty. Operand 163089 states. [2020-04-17 18:45:44,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-04-17 18:45:44,592 INFO L417 BasicCegarLoop]: Found error trace [2020-04-17 18:45:44,592 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-04-17 18:45:44,592 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-04-17 18:45:44,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-17 18:45:44,593 INFO L82 PathProgramCache]: Analyzing trace with hash 62348159, now seen corresponding path program 1 times [2020-04-17 18:45:44,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-17 18:45:44,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318384884] [2020-04-17 18:45:44,593 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-17 18:45:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-17 18:45:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-17 18:45:44,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318384884] [2020-04-17 18:45:44,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-17 18:45:44,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-17 18:45:44,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464412728] [2020-04-17 18:45:44,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-17 18:45:44,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-17 18:45:44,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-17 18:45:44,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-17 18:45:44,605 INFO L87 Difference]: Start difference. First operand 163089 states. Second operand 3 states. [2020-04-17 18:45:46,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-17 18:45:46,205 INFO L93 Difference]: Finished difference Result 163089 states and 717318 transitions. [2020-04-17 18:45:46,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-17 18:45:46,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-04-17 18:45:46,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-17 18:45:46,703 INFO L225 Difference]: With dead ends: 163089 [2020-04-17 18:45:46,703 INFO L226 Difference]: Without dead ends: 143404 [2020-04-17 18:45:46,703 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 Received shutdown request... [2020-04-17 18:45:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143404 states. [2020-04-17 18:45:56,586 WARN L544 AbstractCegarLoop]: Verification canceled [2020-04-17 18:45:56,589 WARN L228 ceAbstractionStarter]: Timeout [2020-04-17 18:45:56,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 06:45:56 BasicIcfg [2020-04-17 18:45:56,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-17 18:45:56,591 INFO L168 Benchmark]: Toolchain (without parser) took 233937.44 ms. Allocated memory was 139.5 MB in the beginning and 3.1 GB in the end (delta: 3.0 GB). Free memory was 100.8 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. [2020-04-17 18:45:56,591 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-04-17 18:45:56,592 INFO L168 Benchmark]: CACSL2BoogieTranslator took 951.87 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 98.4 MB in the beginning and 123.0 MB in the end (delta: -24.5 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB. [2020-04-17 18:45:56,593 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.15 ms. Allocated memory is still 203.9 MB. Free memory was 123.0 MB in the beginning and 120.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-04-17 18:45:56,593 INFO L168 Benchmark]: Boogie Preprocessor took 52.18 ms. Allocated memory is still 203.9 MB. Free memory was 120.3 MB in the beginning and 118.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-04-17 18:45:56,593 INFO L168 Benchmark]: RCFGBuilder took 566.24 ms. Allocated memory is still 203.9 MB. Free memory was 118.9 MB in the beginning and 92.7 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. [2020-04-17 18:45:56,594 INFO L168 Benchmark]: TraceAbstraction took 232274.62 ms. Allocated memory was 203.9 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 92.7 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. [2020-04-17 18:45:56,595 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 951.87 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 98.4 MB in the beginning and 123.0 MB in the end (delta: -24.5 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 62.15 ms. Allocated memory is still 203.9 MB. Free memory was 123.0 MB in the beginning and 120.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 52.18 ms. Allocated memory is still 203.9 MB. Free memory was 120.3 MB in the beginning and 118.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 566.24 ms. Allocated memory is still 203.9 MB. Free memory was 118.9 MB in the beginning and 92.7 MB in the end (delta: 26.2 MB). Peak memory consumption was 26.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 232274.62 ms. Allocated memory was 203.9 MB in the beginning and 3.1 GB in the end (delta: 2.9 GB). Free memory was 92.7 MB in the beginning and 1.7 GB in the end (delta: -1.6 GB). Peak memory consumption was 2.9 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 9.3s, 79 ProgramPointsBefore, 18 ProgramPointsAfterwards, 84 TransitionsBefore, 17 TransitionsAfterwards, 344 CoEnabledTransitionPairs, 7 FixpointIterations, 33 TrivialSequentialCompositions, 28 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 163 VarBasedMoverChecksPositive, 14 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 13 SemBasedMoverChecksNegative, 3 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 6.9s, 0 MoverChecksTotal, 293 CheckedPairsTotal, 77 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 9.1s, 86 ProgramPointsBefore, 24 ProgramPointsAfterwards, 90 TransitionsBefore, 22 TransitionsAfterwards, 824 CoEnabledTransitionPairs, 8 FixpointIterations, 33 TrivialSequentialCompositions, 34 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 8 ConcurrentYvCompositions, 6 ChoiceCompositions, 391 VarBasedMoverChecksPositive, 15 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 14 SemBasedMoverChecksNegative, 3 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 6.6s, 0 MoverChecksTotal, 676 CheckedPairsTotal, 79 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 9.2s, 93 ProgramPointsBefore, 28 ProgramPointsAfterwards, 96 TransitionsBefore, 25 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 8 FixpointIterations, 29 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 9 ConcurrentYvCompositions, 6 ChoiceCompositions, 618 VarBasedMoverChecksPositive, 17 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 15 SemBasedMoverChecksNegative, 3 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 6.7s, 0 MoverChecksTotal, 1092 CheckedPairsTotal, 84 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 11.8s, 100 ProgramPointsBefore, 32 ProgramPointsAfterwards, 102 TransitionsBefore, 28 TransitionsAfterwards, 1872 CoEnabledTransitionPairs, 7 FixpointIterations, 28 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 920 VarBasedMoverChecksPositive, 28 VarBasedMoverChecksNegative, 2 SemBasedMoverChecksPositive, 28 SemBasedMoverChecksNegative, 4 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 9.1s, 0 MoverChecksTotal, 1730 CheckedPairsTotal, 84 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 12.3s, 107 ProgramPointsBefore, 36 ProgramPointsAfterwards, 108 TransitionsBefore, 31 TransitionsAfterwards, 2480 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 10 ConcurrentYvCompositions, 6 ChoiceCompositions, 1174 VarBasedMoverChecksPositive, 21 VarBasedMoverChecksNegative, 4 SemBasedMoverChecksPositive, 15 SemBasedMoverChecksNegative, 4 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 9.6s, 0 MoverChecksTotal, 1953 CheckedPairsTotal, 87 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 16.3s, 114 ProgramPointsBefore, 40 ProgramPointsAfterwards, 114 TransitionsBefore, 34 TransitionsAfterwards, 3144 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 10 ConcurrentYvCompositions, 6 ChoiceCompositions, 1453 VarBasedMoverChecksPositive, 17 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 13 SemBasedMoverChecksNegative, 6 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 13.3s, 0 MoverChecksTotal, 2432 CheckedPairsTotal, 90 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 10.6s, 121 ProgramPointsBefore, 44 ProgramPointsAfterwards, 120 TransitionsBefore, 37 TransitionsAfterwards, 3864 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 1791 VarBasedMoverChecksPositive, 23 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 22 SemBasedMoverChecksNegative, 3 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 6.7s, 0 MoverChecksTotal, 3124 CheckedPairsTotal, 95 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 14.3s, 128 ProgramPointsBefore, 48 ProgramPointsAfterwards, 126 TransitionsBefore, 40 TransitionsAfterwards, 4640 CoEnabledTransitionPairs, 7 FixpointIterations, 29 TrivialSequentialCompositions, 51 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 11 ConcurrentYvCompositions, 6 ChoiceCompositions, 2195 VarBasedMoverChecksPositive, 33 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 32 SemBasedMoverChecksNegative, 4 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 9.1s, 0 MoverChecksTotal, 3851 CheckedPairsTotal, 98 TotalNumberOfCompositions - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 14.8s, 135 ProgramPointsBefore, 52 ProgramPointsAfterwards, 132 TransitionsBefore, 43 TransitionsAfterwards, 5472 CoEnabledTransitionPairs, 7 FixpointIterations, 28 TrivialSequentialCompositions, 56 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 9 ConcurrentYvCompositions, 6 ChoiceCompositions, 2521 VarBasedMoverChecksPositive, 29 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 29 SemBasedMoverChecksNegative, 3 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 6.7s, 0 MoverChecksTotal, 4378 CheckedPairsTotal, 98 TotalNumberOfCompositions - TimeoutResultAtElement [Line: 1092]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 1092). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 76 locations, 1 error locations. Started 9 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 231.6s, OverallIterations: 53, TraceHistogramMax: 9, AutomataDifference: 12.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 159.5s, HoareTripleCheckerStatistics: 1264 SDtfs, 2002 SDslu, 4001 SDs, 0 SdLazy, 2232 SolverSat, 97 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1050 GetRequests, 689 SyntacticMatches, 0 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=163089occurred 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: 42.1s AutomataMinimizationTime, 45 MinimizatonAttempts, 3570 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 1994 NumberOfCodeBlocks, 1994 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 1666 ConstructedInterpolants, 0 QuantifiedInterpolants, 313822 SizeOfPredicates, 28 NumberOfNonLiveVariables, 4088 ConjunctsInSsa, 168 ConjunctsInUnsatCore, 73 InterpolantComputations, 17 PerfectInterpolantSequences, 64/1800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown