/usr/bin/java -Xmx16000000000 -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-nondet/nondet-array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-15 23:03:21,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 23:03:21,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 23:03:21,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 23:03:21,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 23:03:21,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 23:03:21,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 23:03:21,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 23:03:21,176 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 23:03:21,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 23:03:21,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 23:03:21,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 23:03:21,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 23:03:21,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 23:03:21,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 23:03:21,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 23:03:21,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 23:03:21,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 23:03:21,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 23:03:21,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 23:03:21,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 23:03:21,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 23:03:21,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 23:03:21,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 23:03:21,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 23:03:21,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 23:03:21,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 23:03:21,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 23:03:21,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 23:03:21,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 23:03:21,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 23:03:21,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 23:03:21,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 23:03:21,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 23:03:21,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 23:03:21,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 23:03:21,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 23:03:21,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 23:03:21,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 23:03:21,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 23:03:21,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 23:03:21,227 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 [2020-10-15 23:03:21,273 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 23:03:21,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 23:03:21,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 23:03:21,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 23:03:21,275 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 23:03:21,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 23:03:21,276 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 23:03:21,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 23:03:21,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 23:03:21,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 23:03:21,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 23:03:21,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 23:03:21,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 23:03:21,279 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 23:03:21,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 23:03:21,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 23:03:21,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 23:03:21,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 23:03:21,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 23:03:21,280 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 23:03:21,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 23:03:21,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 23:03:21,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 23:03:21,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 23:03:21,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 23:03:21,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 23:03:21,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 23:03:21,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 23:03:21,282 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-15 23:03:21,559 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 23:03:21,571 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 23:03:21,575 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 23:03:21,576 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 23:03:21,576 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 23:03:21,577 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-nondet/nondet-array-2.i [2020-10-15 23:03:21,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e5b81a3b/ffcf349eb0914cc59b7c7c27da67a1c9/FLAG2a132e347 [2020-10-15 23:03:22,200 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 23:03:22,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-nondet/nondet-array-2.i [2020-10-15 23:03:22,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e5b81a3b/ffcf349eb0914cc59b7c7c27da67a1c9/FLAG2a132e347 [2020-10-15 23:03:22,504 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e5b81a3b/ffcf349eb0914cc59b7c7c27da67a1c9 [2020-10-15 23:03:22,515 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 23:03:22,517 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-15 23:03:22,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 23:03:22,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 23:03:22,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 23:03:22,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 11:03:22" (1/1) ... [2020-10-15 23:03:22,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cbd39d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:03:22, skipping insertion in model container [2020-10-15 23:03:22,526 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 11:03:22" (1/1) ... [2020-10-15 23:03:22,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 23:03:22,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 23:03:23,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 23:03:23,089 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 23:03:23,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 23:03:23,202 INFO L208 MainTranslator]: Completed translation [2020-10-15 23:03:23,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:03:23 WrapperNode [2020-10-15 23:03:23,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 23:03:23,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-15 23:03:23,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-15 23:03:23,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-15 23:03:23,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:03:23" (1/1) ... [2020-10-15 23:03:23,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:03:23" (1/1) ... [2020-10-15 23:03:23,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-15 23:03:23,258 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 23:03:23,258 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 23:03:23,258 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 23:03:23,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:03:23" (1/1) ... [2020-10-15 23:03:23,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:03:23" (1/1) ... [2020-10-15 23:03:23,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:03:23" (1/1) ... [2020-10-15 23:03:23,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:03:23" (1/1) ... [2020-10-15 23:03:23,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:03:23" (1/1) ... [2020-10-15 23:03:23,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:03:23" (1/1) ... [2020-10-15 23:03:23,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:03:23" (1/1) ... [2020-10-15 23:03:23,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 23:03:23,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 23:03:23,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 23:03:23,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 23:03:23,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:03:23" (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 [2020-10-15 23:03:23,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-10-15 23:03:23,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-15 23:03:23,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-15 23:03:23,372 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2020-10-15 23:03:23,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2020-10-15 23:03:23,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-15 23:03:23,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-15 23:03:23,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 23:03:23,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 23:03:23,374 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-15 23:03:23,753 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 23:03:23,754 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-15 23:03:23,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 11:03:23 BoogieIcfgContainer [2020-10-15 23:03:23,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 23:03:23,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 23:03:23,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 23:03:23,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 23:03:23,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 11:03:22" (1/3) ... [2020-10-15 23:03:23,762 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f5b2f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 11:03:23, skipping insertion in model container [2020-10-15 23:03:23,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 11:03:23" (2/3) ... [2020-10-15 23:03:23,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f5b2f0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 11:03:23, skipping insertion in model container [2020-10-15 23:03:23,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 11:03:23" (3/3) ... [2020-10-15 23:03:23,765 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-array-2.i [2020-10-15 23:03:23,777 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-15 23:03:23,777 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-15 23:03:23,785 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 23:03:23,786 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-15 23:03:23,809 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:23,809 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:23,810 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:23,810 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:23,811 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:23,811 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:23,811 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:23,815 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:23,816 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:23,816 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:23,816 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:23,816 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:23,842 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-15 23:03:23,864 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 23:03:23,865 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 23:03:23,865 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 23:03:23,865 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 23:03:23,865 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 23:03:23,865 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 23:03:23,866 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 23:03:23,866 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 23:03:23,879 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 23:03:23,882 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 71 transitions, 150 flow [2020-10-15 23:03:23,884 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 71 transitions, 150 flow [2020-10-15 23:03:23,886 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 71 transitions, 150 flow [2020-10-15 23:03:23,940 INFO L129 PetriNetUnfolder]: 12/103 cut-off events. [2020-10-15 23:03:23,941 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-15 23:03:23,945 INFO L80 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 103 events. 12/103 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 206 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2020-10-15 23:03:23,948 INFO L117 LiptonReduction]: Number of co-enabled transitions 370 [2020-10-15 23:03:25,369 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-15 23:03:25,614 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-15 23:03:25,802 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-15 23:03:25,878 INFO L132 LiptonReduction]: Checked pairs total: 397 [2020-10-15 23:03:25,878 INFO L134 LiptonReduction]: Total number of compositions: 71 [2020-10-15 23:03:25,885 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 14 transitions, 36 flow [2020-10-15 23:03:25,895 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 27 states. [2020-10-15 23:03:25,897 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-15 23:03:25,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-15 23:03:25,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:25,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-15 23:03:25,904 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:25,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:25,911 INFO L82 PathProgramCache]: Analyzing trace with hash 8680406, now seen corresponding path program 1 times [2020-10-15 23:03:25,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:25,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267537679] [2020-10-15 23:03:25,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:03:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:03:26,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267537679] [2020-10-15 23:03:26,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:03:26,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 23:03:26,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090184601] [2020-10-15 23:03:26,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 23:03:26,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:03:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 23:03:26,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 23:03:26,137 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-10-15 23:03:26,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:03:26,176 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2020-10-15 23:03:26,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 23:03:26,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-15 23:03:26,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:03:26,189 INFO L225 Difference]: With dead ends: 27 [2020-10-15 23:03:26,190 INFO L226 Difference]: Without dead ends: 23 [2020-10-15 23:03:26,191 INFO L677 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 [2020-10-15 23:03:26,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-15 23:03:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-15 23:03:26,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-15 23:03:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2020-10-15 23:03:26,230 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 4 [2020-10-15 23:03:26,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:03:26,230 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2020-10-15 23:03:26,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 23:03:26,231 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2020-10-15 23:03:26,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-15 23:03:26,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:26,231 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2020-10-15 23:03:26,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 23:03:26,232 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:26,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:26,232 INFO L82 PathProgramCache]: Analyzing trace with hash -256835414, now seen corresponding path program 1 times [2020-10-15 23:03:26,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:26,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193057255] [2020-10-15 23:03:26,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 23:03:26,266 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 23:03:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 23:03:26,286 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 23:03:26,311 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-15 23:03:26,311 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 23:03:26,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 23:03:26,313 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-15 23:03:26,314 WARN L371 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-15 23:03:26,315 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-15 23:03:26,322 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,322 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,322 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,322 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,323 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,323 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,323 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,323 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,324 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,324 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,324 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,324 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,324 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,325 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,325 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,326 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,326 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,326 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,326 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,328 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,329 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,329 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,329 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,329 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:26,335 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-15 23:03:26,336 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 23:03:26,336 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 23:03:26,336 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 23:03:26,336 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 23:03:26,336 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 23:03:26,336 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 23:03:26,337 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 23:03:26,337 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 23:03:26,339 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 23:03:26,339 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 78 transitions, 174 flow [2020-10-15 23:03:26,339 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 78 transitions, 174 flow [2020-10-15 23:03:26,339 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 174 flow [2020-10-15 23:03:26,376 INFO L129 PetriNetUnfolder]: 23/183 cut-off events. [2020-10-15 23:03:26,377 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-15 23:03:26,379 INFO L80 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 183 events. 23/183 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 456 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2020-10-15 23:03:26,381 INFO L117 LiptonReduction]: Number of co-enabled transitions 900 [2020-10-15 23:03:27,525 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-15 23:03:27,827 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-15 23:03:28,067 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-15 23:03:28,146 INFO L132 LiptonReduction]: Checked pairs total: 2415 [2020-10-15 23:03:28,146 INFO L134 LiptonReduction]: Total number of compositions: 67 [2020-10-15 23:03:28,146 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 23 transitions, 64 flow [2020-10-15 23:03:28,159 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 242 states. [2020-10-15 23:03:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states. [2020-10-15 23:03:28,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-15 23:03:28,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:28,160 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-15 23:03:28,160 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:28,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:28,161 INFO L82 PathProgramCache]: Analyzing trace with hash 13452069, now seen corresponding path program 1 times [2020-10-15 23:03:28,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:28,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581092485] [2020-10-15 23:03:28,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:03:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:03:28,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581092485] [2020-10-15 23:03:28,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:03:28,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 23:03:28,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052236923] [2020-10-15 23:03:28,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 23:03:28,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:03:28,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 23:03:28,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 23:03:28,227 INFO L87 Difference]: Start difference. First operand 242 states. Second operand 3 states. [2020-10-15 23:03:28,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:03:28,267 INFO L93 Difference]: Finished difference Result 242 states and 550 transitions. [2020-10-15 23:03:28,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 23:03:28,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-15 23:03:28,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:03:28,280 INFO L225 Difference]: With dead ends: 242 [2020-10-15 23:03:28,280 INFO L226 Difference]: Without dead ends: 216 [2020-10-15 23:03:28,281 INFO L677 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 [2020-10-15 23:03:28,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-15 23:03:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-10-15 23:03:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-15 23:03:28,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 494 transitions. [2020-10-15 23:03:28,331 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 494 transitions. Word has length 4 [2020-10-15 23:03:28,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:03:28,331 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 494 transitions. [2020-10-15 23:03:28,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 23:03:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 494 transitions. [2020-10-15 23:03:28,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 23:03:28,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:28,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:03:28,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 23:03:28,334 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:28,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:28,334 INFO L82 PathProgramCache]: Analyzing trace with hash 76722491, now seen corresponding path program 1 times [2020-10-15 23:03:28,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:28,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755131188] [2020-10-15 23:03:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:03:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 23:03:28,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755131188] [2020-10-15 23:03:28,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:03:28,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 23:03:28,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304782833] [2020-10-15 23:03:28,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 23:03:28,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:03:28,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 23:03:28,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 23:03:28,422 INFO L87 Difference]: Start difference. First operand 216 states and 494 transitions. Second operand 4 states. [2020-10-15 23:03:28,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:03:28,468 INFO L93 Difference]: Finished difference Result 203 states and 426 transitions. [2020-10-15 23:03:28,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 23:03:28,473 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-15 23:03:28,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:03:28,475 INFO L225 Difference]: With dead ends: 203 [2020-10-15 23:03:28,475 INFO L226 Difference]: Without dead ends: 203 [2020-10-15 23:03:28,476 INFO L677 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 [2020-10-15 23:03:28,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-15 23:03:28,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 197. [2020-10-15 23:03:28,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-15 23:03:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 420 transitions. [2020-10-15 23:03:28,491 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 420 transitions. Word has length 8 [2020-10-15 23:03:28,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:03:28,491 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 420 transitions. [2020-10-15 23:03:28,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 23:03:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 420 transitions. [2020-10-15 23:03:28,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-15 23:03:28,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:28,493 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2020-10-15 23:03:28,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 23:03:28,493 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:28,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:28,494 INFO L82 PathProgramCache]: Analyzing trace with hash 94633273, now seen corresponding path program 1 times [2020-10-15 23:03:28,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:28,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980505530] [2020-10-15 23:03:28,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 23:03:28,513 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 23:03:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 23:03:28,534 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 23:03:28,545 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-15 23:03:28,545 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 23:03:28,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 23:03:28,546 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-15 23:03:28,546 WARN L371 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-15 23:03:28,550 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-15 23:03:28,557 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,562 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,563 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,563 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,563 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,563 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,563 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,564 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,564 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,564 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,567 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,568 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,568 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,568 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,568 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,569 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,569 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,569 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,569 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,569 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,570 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,572 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,572 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,573 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,573 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,573 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,582 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,583 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,583 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,583 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,583 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,587 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,587 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,588 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,588 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,588 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:28,605 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-15 23:03:28,606 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 23:03:28,606 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 23:03:28,606 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 23:03:28,606 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 23:03:28,606 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 23:03:28,606 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 23:03:28,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 23:03:28,606 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 23:03:28,608 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 23:03:28,608 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 85 transitions, 200 flow [2020-10-15 23:03:28,608 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 85 transitions, 200 flow [2020-10-15 23:03:28,608 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 200 flow [2020-10-15 23:03:28,696 INFO L129 PetriNetUnfolder]: 45/330 cut-off events. [2020-10-15 23:03:28,696 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-15 23:03:28,698 INFO L80 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 330 events. 45/330 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1086 event pairs, 1 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 191. Up to 16 conditions per place. [2020-10-15 23:03:28,702 INFO L117 LiptonReduction]: Number of co-enabled transitions 1470 [2020-10-15 23:03:30,040 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-15 23:03:30,136 INFO L132 LiptonReduction]: Checked pairs total: 4432 [2020-10-15 23:03:30,137 INFO L134 LiptonReduction]: Total number of compositions: 73 [2020-10-15 23:03:30,138 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 28 transitions, 86 flow [2020-10-15 23:03:30,201 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1150 states. [2020-10-15 23:03:30,202 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states. [2020-10-15 23:03:30,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-15 23:03:30,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:30,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-15 23:03:30,202 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:30,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:30,203 INFO L82 PathProgramCache]: Analyzing trace with hash 18528206, now seen corresponding path program 1 times [2020-10-15 23:03:30,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:30,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864935541] [2020-10-15 23:03:30,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:03:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:03:30,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864935541] [2020-10-15 23:03:30,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:03:30,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 23:03:30,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663178517] [2020-10-15 23:03:30,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 23:03:30,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:03:30,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 23:03:30,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 23:03:30,265 INFO L87 Difference]: Start difference. First operand 1150 states. Second operand 3 states. [2020-10-15 23:03:30,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:03:30,308 INFO L93 Difference]: Finished difference Result 1150 states and 3360 transitions. [2020-10-15 23:03:30,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 23:03:30,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-15 23:03:30,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:03:30,318 INFO L225 Difference]: With dead ends: 1150 [2020-10-15 23:03:30,319 INFO L226 Difference]: Without dead ends: 1024 [2020-10-15 23:03:30,319 INFO L677 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 [2020-10-15 23:03:30,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2020-10-15 23:03:30,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1024. [2020-10-15 23:03:30,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-10-15 23:03:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3009 transitions. [2020-10-15 23:03:30,385 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3009 transitions. Word has length 4 [2020-10-15 23:03:30,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:03:30,385 INFO L481 AbstractCegarLoop]: Abstraction has 1024 states and 3009 transitions. [2020-10-15 23:03:30,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 23:03:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3009 transitions. [2020-10-15 23:03:30,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 23:03:30,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:30,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:03:30,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 23:03:30,387 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:30,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:30,387 INFO L82 PathProgramCache]: Analyzing trace with hash 949696130, now seen corresponding path program 1 times [2020-10-15 23:03:30,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:30,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994201720] [2020-10-15 23:03:30,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:03:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 23:03:30,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994201720] [2020-10-15 23:03:30,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:03:30,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 23:03:30,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180869917] [2020-10-15 23:03:30,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 23:03:30,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:03:30,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 23:03:30,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 23:03:30,454 INFO L87 Difference]: Start difference. First operand 1024 states and 3009 transitions. Second operand 4 states. [2020-10-15 23:03:30,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:03:30,496 INFO L93 Difference]: Finished difference Result 1015 states and 2784 transitions. [2020-10-15 23:03:30,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 23:03:30,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-15 23:03:30,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:03:30,505 INFO L225 Difference]: With dead ends: 1015 [2020-10-15 23:03:30,505 INFO L226 Difference]: Without dead ends: 1015 [2020-10-15 23:03:30,506 INFO L677 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 [2020-10-15 23:03:30,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2020-10-15 23:03:30,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 977. [2020-10-15 23:03:30,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 977 states. [2020-10-15 23:03:30,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2718 transitions. [2020-10-15 23:03:30,540 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2718 transitions. Word has length 8 [2020-10-15 23:03:30,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:03:30,540 INFO L481 AbstractCegarLoop]: Abstraction has 977 states and 2718 transitions. [2020-10-15 23:03:30,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 23:03:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2718 transitions. [2020-10-15 23:03:30,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-15 23:03:30,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:30,543 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2020-10-15 23:03:30,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 23:03:30,544 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:30,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:30,544 INFO L82 PathProgramCache]: Analyzing trace with hash -515475845, now seen corresponding path program 1 times [2020-10-15 23:03:30,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:30,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030335188] [2020-10-15 23:03:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 23:03:30,559 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 23:03:30,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 23:03:30,571 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 23:03:30,577 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-15 23:03:30,577 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 23:03:30,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 23:03:30,578 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-15 23:03:30,578 WARN L371 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-15 23:03:30,579 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-15 23:03:30,585 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,585 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,585 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,586 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,586 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,586 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,586 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,586 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,586 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,587 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,587 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,587 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,587 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,587 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,588 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,588 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,588 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,588 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,588 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,588 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,589 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,589 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,589 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,589 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,589 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,589 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,590 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,590 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,590 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,590 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,591 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,591 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,591 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,596 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,597 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,597 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,597 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,597 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,599 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,599 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,599 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,599 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,599 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,600 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,601 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,601 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,601 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,601 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:30,605 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-15 23:03:30,605 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 23:03:30,605 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 23:03:30,606 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 23:03:30,606 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 23:03:30,606 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 23:03:30,606 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 23:03:30,606 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 23:03:30,606 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 23:03:30,607 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 23:03:30,608 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 92 transitions, 228 flow [2020-10-15 23:03:30,608 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 92 transitions, 228 flow [2020-10-15 23:03:30,608 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 228 flow [2020-10-15 23:03:30,672 INFO L129 PetriNetUnfolder]: 91/613 cut-off events. [2020-10-15 23:03:30,672 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-15 23:03:30,674 INFO L80 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 613 events. 91/613 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2732 event pairs, 6 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 350. Up to 32 conditions per place. [2020-10-15 23:03:30,686 INFO L117 LiptonReduction]: Number of co-enabled transitions 2120 [2020-10-15 23:03:32,266 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-15 23:03:32,359 INFO L132 LiptonReduction]: Checked pairs total: 7163 [2020-10-15 23:03:32,359 INFO L134 LiptonReduction]: Total number of compositions: 73 [2020-10-15 23:03:32,360 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 110 flow [2020-10-15 23:03:32,682 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 5482 states. [2020-10-15 23:03:32,683 INFO L276 IsEmpty]: Start isEmpty. Operand 5482 states. [2020-10-15 23:03:32,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-15 23:03:32,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:32,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-15 23:03:32,684 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:32,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:32,684 INFO L82 PathProgramCache]: Analyzing trace with hash 23824947, now seen corresponding path program 1 times [2020-10-15 23:03:32,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:32,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553002776] [2020-10-15 23:03:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:03:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:03:32,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553002776] [2020-10-15 23:03:32,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:03:32,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 23:03:32,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338869114] [2020-10-15 23:03:32,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 23:03:32,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:03:32,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 23:03:32,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 23:03:32,706 INFO L87 Difference]: Start difference. First operand 5482 states. Second operand 3 states. [2020-10-15 23:03:32,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:03:32,787 INFO L93 Difference]: Finished difference Result 5482 states and 19554 transitions. [2020-10-15 23:03:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 23:03:32,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-15 23:03:32,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:03:32,830 INFO L225 Difference]: With dead ends: 5482 [2020-10-15 23:03:32,831 INFO L226 Difference]: Without dead ends: 4856 [2020-10-15 23:03:32,831 INFO L677 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 [2020-10-15 23:03:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2020-10-15 23:03:33,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2020-10-15 23:03:33,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4856 states. [2020-10-15 23:03:33,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 17428 transitions. [2020-10-15 23:03:33,063 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 17428 transitions. Word has length 4 [2020-10-15 23:03:33,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:03:33,064 INFO L481 AbstractCegarLoop]: Abstraction has 4856 states and 17428 transitions. [2020-10-15 23:03:33,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 23:03:33,064 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 17428 transitions. [2020-10-15 23:03:33,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 23:03:33,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:33,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:03:33,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 23:03:33,065 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:33,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:33,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1205655351, now seen corresponding path program 1 times [2020-10-15 23:03:33,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:33,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722173895] [2020-10-15 23:03:33,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:03:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 23:03:33,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722173895] [2020-10-15 23:03:33,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:03:33,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 23:03:33,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160917678] [2020-10-15 23:03:33,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 23:03:33,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:03:33,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 23:03:33,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 23:03:33,095 INFO L87 Difference]: Start difference. First operand 4856 states and 17428 transitions. Second operand 4 states. [2020-10-15 23:03:33,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:03:33,167 INFO L93 Difference]: Finished difference Result 4995 states and 16978 transitions. [2020-10-15 23:03:33,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 23:03:33,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-15 23:03:33,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:03:33,209 INFO L225 Difference]: With dead ends: 4995 [2020-10-15 23:03:33,210 INFO L226 Difference]: Without dead ends: 4995 [2020-10-15 23:03:33,210 INFO L677 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 [2020-10-15 23:03:33,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4995 states. [2020-10-15 23:03:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4995 to 4797. [2020-10-15 23:03:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4797 states. [2020-10-15 23:03:33,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4797 states to 4797 states and 16480 transitions. [2020-10-15 23:03:33,475 INFO L78 Accepts]: Start accepts. Automaton has 4797 states and 16480 transitions. Word has length 8 [2020-10-15 23:03:33,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:03:33,476 INFO L481 AbstractCegarLoop]: Abstraction has 4797 states and 16480 transitions. [2020-10-15 23:03:33,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 23:03:33,476 INFO L276 IsEmpty]: Start isEmpty. Operand 4797 states and 16480 transitions. [2020-10-15 23:03:33,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 23:03:33,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:33,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:03:33,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 23:03:33,482 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:33,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:33,483 INFO L82 PathProgramCache]: Analyzing trace with hash 172994846, now seen corresponding path program 1 times [2020-10-15 23:03:33,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:33,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425596563] [2020-10-15 23:03:33,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:03:33,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 23:03:33,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425596563] [2020-10-15 23:03:33,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200427773] [2020-10-15 23:03:33,523 INFO L95 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 [2020-10-15 23:03:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:03:33,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-15 23:03:33,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:03:33,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 23:03:33,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:03:33,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-15 23:03:33,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696240193] [2020-10-15 23:03:33,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 23:03:33,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:03:33,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 23:03:33,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-15 23:03:33,626 INFO L87 Difference]: Start difference. First operand 4797 states and 16480 transitions. Second operand 6 states. [2020-10-15 23:03:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:03:33,727 INFO L93 Difference]: Finished difference Result 4793 states and 16469 transitions. [2020-10-15 23:03:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 23:03:33,727 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-15 23:03:33,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:03:33,784 INFO L225 Difference]: With dead ends: 4793 [2020-10-15 23:03:33,784 INFO L226 Difference]: Without dead ends: 4793 [2020-10-15 23:03:33,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-15 23:03:33,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4793 states. [2020-10-15 23:03:33,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4793 to 4793. [2020-10-15 23:03:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4793 states. [2020-10-15 23:03:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4793 states to 4793 states and 16469 transitions. [2020-10-15 23:03:33,952 INFO L78 Accepts]: Start accepts. Automaton has 4793 states and 16469 transitions. Word has length 16 [2020-10-15 23:03:33,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:03:33,952 INFO L481 AbstractCegarLoop]: Abstraction has 4793 states and 16469 transitions. [2020-10-15 23:03:33,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 23:03:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4793 states and 16469 transitions. [2020-10-15 23:03:33,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-15 23:03:33,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:33,955 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-10-15 23:03:34,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-15 23:03:34,169 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:34,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:34,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1534304145, now seen corresponding path program 1 times [2020-10-15 23:03:34,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:34,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960872408] [2020-10-15 23:03:34,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 23:03:34,191 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 23:03:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 23:03:34,208 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 23:03:34,226 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-15 23:03:34,226 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 23:03:34,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 23:03:34,227 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-15 23:03:34,227 WARN L371 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-15 23:03:34,228 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-10-15 23:03:34,237 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,238 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,238 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,238 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,238 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,238 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,238 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,239 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,239 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,239 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,239 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,239 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,239 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,239 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,240 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,240 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,241 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,241 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,241 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,241 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,241 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,242 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,242 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,242 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,242 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,243 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,243 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,243 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,243 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,243 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,243 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,243 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,244 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,244 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,244 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,244 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,244 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,245 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,245 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,247 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,248 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,249 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,249 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,249 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,249 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,250 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,250 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,251 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,251 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,251 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,252 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,252 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,252 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,253 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,253 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,254 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,254 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,254 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,254 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,255 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:34,259 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-15 23:03:34,260 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 23:03:34,260 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 23:03:34,260 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 23:03:34,260 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 23:03:34,260 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 23:03:34,260 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 23:03:34,261 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 23:03:34,261 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 23:03:34,262 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 23:03:34,262 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 258 flow [2020-10-15 23:03:34,262 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 99 transitions, 258 flow [2020-10-15 23:03:34,262 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 258 flow [2020-10-15 23:03:34,392 INFO L129 PetriNetUnfolder]: 189/1172 cut-off events. [2020-10-15 23:03:34,392 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-15 23:03:34,399 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 1172 events. 189/1172 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6706 event pairs, 23 based on Foata normal form. 0/967 useless extension candidates. Maximal degree in co-relation 658. Up to 80 conditions per place. [2020-10-15 23:03:34,424 INFO L117 LiptonReduction]: Number of co-enabled transitions 2850 [2020-10-15 23:03:35,854 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-15 23:03:36,269 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-15 23:03:36,348 INFO L132 LiptonReduction]: Checked pairs total: 9531 [2020-10-15 23:03:36,348 INFO L134 LiptonReduction]: Total number of compositions: 75 [2020-10-15 23:03:36,348 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 38 transitions, 136 flow [2020-10-15 23:03:38,696 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 26310 states. [2020-10-15 23:03:38,696 INFO L276 IsEmpty]: Start isEmpty. Operand 26310 states. [2020-10-15 23:03:38,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-15 23:03:38,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:38,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-15 23:03:38,697 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:38,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:38,697 INFO L82 PathProgramCache]: Analyzing trace with hash 29336307, now seen corresponding path program 1 times [2020-10-15 23:03:38,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:38,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382762129] [2020-10-15 23:03:38,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:03:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:03:38,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382762129] [2020-10-15 23:03:38,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:03:38,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 23:03:38,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199252533] [2020-10-15 23:03:38,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 23:03:38,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:03:38,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 23:03:38,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 23:03:38,714 INFO L87 Difference]: Start difference. First operand 26310 states. Second operand 3 states. [2020-10-15 23:03:38,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:03:38,924 INFO L93 Difference]: Finished difference Result 26310 states and 110676 transitions. [2020-10-15 23:03:38,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 23:03:38,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-15 23:03:38,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:03:39,044 INFO L225 Difference]: With dead ends: 26310 [2020-10-15 23:03:39,044 INFO L226 Difference]: Without dead ends: 23184 [2020-10-15 23:03:39,045 INFO L677 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 [2020-10-15 23:03:39,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23184 states. [2020-10-15 23:03:40,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23184 to 23184. [2020-10-15 23:03:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23184 states. [2020-10-15 23:03:41,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23184 states to 23184 states and 98175 transitions. [2020-10-15 23:03:41,026 INFO L78 Accepts]: Start accepts. Automaton has 23184 states and 98175 transitions. Word has length 4 [2020-10-15 23:03:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:03:41,027 INFO L481 AbstractCegarLoop]: Abstraction has 23184 states and 98175 transitions. [2020-10-15 23:03:41,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 23:03:41,027 INFO L276 IsEmpty]: Start isEmpty. Operand 23184 states and 98175 transitions. [2020-10-15 23:03:41,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 23:03:41,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:41,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:03:41,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 23:03:41,028 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:41,028 INFO L82 PathProgramCache]: Analyzing trace with hash 805936127, now seen corresponding path program 1 times [2020-10-15 23:03:41,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:41,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36956044] [2020-10-15 23:03:41,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:03:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 23:03:41,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36956044] [2020-10-15 23:03:41,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:03:41,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 23:03:41,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623294769] [2020-10-15 23:03:41,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 23:03:41,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:03:41,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 23:03:41,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 23:03:41,057 INFO L87 Difference]: Start difference. First operand 23184 states and 98175 transitions. Second operand 4 states. [2020-10-15 23:03:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:03:41,203 INFO L93 Difference]: Finished difference Result 24543 states and 99524 transitions. [2020-10-15 23:03:41,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 23:03:41,203 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-15 23:03:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:03:41,298 INFO L225 Difference]: With dead ends: 24543 [2020-10-15 23:03:41,298 INFO L226 Difference]: Without dead ends: 24543 [2020-10-15 23:03:41,299 INFO L677 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 [2020-10-15 23:03:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24543 states. [2020-10-15 23:03:42,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24543 to 23577. [2020-10-15 23:03:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23577 states. [2020-10-15 23:03:42,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23577 states to 23577 states and 96338 transitions. [2020-10-15 23:03:42,503 INFO L78 Accepts]: Start accepts. Automaton has 23577 states and 96338 transitions. Word has length 8 [2020-10-15 23:03:42,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:03:42,504 INFO L481 AbstractCegarLoop]: Abstraction has 23577 states and 96338 transitions. [2020-10-15 23:03:42,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 23:03:42,504 INFO L276 IsEmpty]: Start isEmpty. Operand 23577 states and 96338 transitions. [2020-10-15 23:03:42,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 23:03:42,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:42,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:03:42,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 23:03:42,505 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:42,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:42,505 INFO L82 PathProgramCache]: Analyzing trace with hash -447719219, now seen corresponding path program 1 times [2020-10-15 23:03:42,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:42,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358147928] [2020-10-15 23:03:42,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:03:42,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 23:03:42,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358147928] [2020-10-15 23:03:42,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252309465] [2020-10-15 23:03:42,561 INFO L95 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 [2020-10-15 23:03:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:03:42,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-15 23:03:42,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:03:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 23:03:42,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:03:42,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2020-10-15 23:03:42,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645778307] [2020-10-15 23:03:42,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 23:03:42,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:03:42,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 23:03:42,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-15 23:03:42,666 INFO L87 Difference]: Start difference. First operand 23577 states and 96338 transitions. Second operand 7 states. [2020-10-15 23:03:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:03:43,107 INFO L93 Difference]: Finished difference Result 22356 states and 87745 transitions. [2020-10-15 23:03:43,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 23:03:43,107 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-10-15 23:03:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:03:43,167 INFO L225 Difference]: With dead ends: 22356 [2020-10-15 23:03:43,168 INFO L226 Difference]: Without dead ends: 22356 [2020-10-15 23:03:43,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-15 23:03:43,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22356 states. [2020-10-15 23:03:43,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22356 to 21826. [2020-10-15 23:03:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21826 states. [2020-10-15 23:03:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21826 states to 21826 states and 86349 transitions. [2020-10-15 23:03:43,770 INFO L78 Accepts]: Start accepts. Automaton has 21826 states and 86349 transitions. Word has length 16 [2020-10-15 23:03:43,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:03:43,770 INFO L481 AbstractCegarLoop]: Abstraction has 21826 states and 86349 transitions. [2020-10-15 23:03:43,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 23:03:43,770 INFO L276 IsEmpty]: Start isEmpty. Operand 21826 states and 86349 transitions. [2020-10-15 23:03:43,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-15 23:03:43,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:03:43,777 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:03:43,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-15 23:03:43,992 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:03:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:03:43,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1012463302, now seen corresponding path program 1 times [2020-10-15 23:03:43,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:03:43,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452325382] [2020-10-15 23:03:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:03:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 23:03:44,020 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 23:03:44,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 23:03:44,034 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 23:03:44,047 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-15 23:03:44,047 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 23:03:44,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 23:03:44,047 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-15 23:03:44,048 WARN L371 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-15 23:03:44,048 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-10-15 23:03:44,063 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,063 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,063 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,063 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,064 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,064 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,064 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,064 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,064 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,064 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,064 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,065 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,065 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,065 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,065 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,065 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,065 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,065 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,065 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,066 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,066 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,066 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,066 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,066 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,066 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,066 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,067 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,067 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,067 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,067 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,067 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,067 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,067 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,067 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,068 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,068 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,068 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,068 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,069 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,069 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,069 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,069 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,069 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,069 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,069 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,070 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,070 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,075 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,075 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,075 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,075 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,075 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,076 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,076 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,076 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,076 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,076 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,077 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,077 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,077 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,078 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,078 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,079 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,079 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,079 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,079 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,080 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,080 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,080 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,081 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,081 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,081 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:03:44,086 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-15 23:03:44,086 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 23:03:44,086 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 23:03:44,086 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 23:03:44,086 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 23:03:44,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 23:03:44,086 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 23:03:44,087 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 23:03:44,087 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 23:03:44,088 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 23:03:44,088 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 106 transitions, 290 flow [2020-10-15 23:03:44,088 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 106 transitions, 290 flow [2020-10-15 23:03:44,088 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 106 transitions, 290 flow [2020-10-15 23:03:44,309 INFO L129 PetriNetUnfolder]: 399/2291 cut-off events. [2020-10-15 23:03:44,309 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-15 23:03:44,320 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2523 conditions, 2291 events. 399/2291 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 16164 event pairs, 72 based on Foata normal form. 0/1892 useless extension candidates. Maximal degree in co-relation 1271. Up to 192 conditions per place. [2020-10-15 23:03:44,372 INFO L117 LiptonReduction]: Number of co-enabled transitions 3660 [2020-10-15 23:03:44,892 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-10-15 23:03:46,306 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-15 23:03:46,396 INFO L132 LiptonReduction]: Checked pairs total: 14446 [2020-10-15 23:03:46,396 INFO L134 LiptonReduction]: Total number of compositions: 76 [2020-10-15 23:03:46,397 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 43 transitions, 164 flow [2020-10-15 23:04:21,354 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 127122 states. [2020-10-15 23:04:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 127122 states. [2020-10-15 23:04:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-15 23:04:21,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:04:21,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-15 23:04:21,355 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:04:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:04:21,356 INFO L82 PathProgramCache]: Analyzing trace with hash 35155697, now seen corresponding path program 1 times [2020-10-15 23:04:21,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:04:21,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635588072] [2020-10-15 23:04:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:04:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:04:21,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:04:21,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635588072] [2020-10-15 23:04:21,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:04:21,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 23:04:21,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025563794] [2020-10-15 23:04:21,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 23:04:21,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:04:21,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 23:04:21,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 23:04:21,378 INFO L87 Difference]: Start difference. First operand 127122 states. Second operand 3 states. [2020-10-15 23:04:22,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:04:22,041 INFO L93 Difference]: Finished difference Result 127122 states and 615398 transitions. [2020-10-15 23:04:22,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-15 23:04:22,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-10-15 23:04:22,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:04:22,430 INFO L225 Difference]: With dead ends: 127122 [2020-10-15 23:04:22,430 INFO L226 Difference]: Without dead ends: 111496 [2020-10-15 23:04:22,431 INFO L677 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 [2020-10-15 23:04:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111496 states. [2020-10-15 23:04:30,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111496 to 111496. [2020-10-15 23:04:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111496 states. [2020-10-15 23:04:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111496 states to 111496 states and 543522 transitions. [2020-10-15 23:04:31,363 INFO L78 Accepts]: Start accepts. Automaton has 111496 states and 543522 transitions. Word has length 4 [2020-10-15 23:04:31,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:04:31,363 INFO L481 AbstractCegarLoop]: Abstraction has 111496 states and 543522 transitions. [2020-10-15 23:04:31,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-15 23:04:31,363 INFO L276 IsEmpty]: Start isEmpty. Operand 111496 states and 543522 transitions. [2020-10-15 23:04:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-15 23:04:31,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:04:31,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:04:31,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 23:04:31,364 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:04:31,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:04:31,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1170285684, now seen corresponding path program 1 times [2020-10-15 23:04:31,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:04:31,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395086866] [2020-10-15 23:04:31,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:04:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:04:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-15 23:04:31,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395086866] [2020-10-15 23:04:31,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:04:31,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-15 23:04:31,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71443443] [2020-10-15 23:04:31,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 23:04:31,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:04:31,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 23:04:31,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-15 23:04:31,386 INFO L87 Difference]: Start difference. First operand 111496 states and 543522 transitions. Second operand 4 states. [2020-10-15 23:04:37,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:04:37,362 INFO L93 Difference]: Finished difference Result 120747 states and 568406 transitions. [2020-10-15 23:04:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 23:04:37,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-15 23:04:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:04:37,784 INFO L225 Difference]: With dead ends: 120747 [2020-10-15 23:04:37,784 INFO L226 Difference]: Without dead ends: 120747 [2020-10-15 23:04:37,784 INFO L677 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 [2020-10-15 23:04:39,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120747 states. [2020-10-15 23:04:42,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120747 to 116197. [2020-10-15 23:04:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116197 states. [2020-10-15 23:04:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116197 states to 116197 states and 549860 transitions. [2020-10-15 23:04:43,413 INFO L78 Accepts]: Start accepts. Automaton has 116197 states and 549860 transitions. Word has length 8 [2020-10-15 23:04:43,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:04:43,414 INFO L481 AbstractCegarLoop]: Abstraction has 116197 states and 549860 transitions. [2020-10-15 23:04:43,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 23:04:43,414 INFO L276 IsEmpty]: Start isEmpty. Operand 116197 states and 549860 transitions. [2020-10-15 23:04:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-15 23:04:43,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:04:43,415 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:04:43,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 23:04:43,415 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:04:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:04:43,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1082449829, now seen corresponding path program 1 times [2020-10-15 23:04:43,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:04:43,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499211077] [2020-10-15 23:04:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:04:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:04:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 23:04:43,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499211077] [2020-10-15 23:04:43,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319960010] [2020-10-15 23:04:43,453 INFO L95 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 [2020-10-15 23:04:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:04:43,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-15 23:04:43,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:04:43,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 23:04:43,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:04:43,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-15 23:04:43,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324553710] [2020-10-15 23:04:43,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 23:04:43,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:04:43,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 23:04:43,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 23:04:43,549 INFO L87 Difference]: Start difference. First operand 116197 states and 549860 transitions. Second operand 6 states. [2020-10-15 23:04:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:04:44,272 INFO L93 Difference]: Finished difference Result 116193 states and 549849 transitions. [2020-10-15 23:04:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-15 23:04:44,273 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-15 23:04:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:04:44,666 INFO L225 Difference]: With dead ends: 116193 [2020-10-15 23:04:44,667 INFO L226 Difference]: Without dead ends: 116193 [2020-10-15 23:04:44,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-15 23:04:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116193 states. [2020-10-15 23:04:54,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116193 to 116193. [2020-10-15 23:04:54,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116193 states. [2020-10-15 23:04:55,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116193 states to 116193 states and 549849 transitions. [2020-10-15 23:04:55,243 INFO L78 Accepts]: Start accepts. Automaton has 116193 states and 549849 transitions. Word has length 16 [2020-10-15 23:04:55,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:04:55,243 INFO L481 AbstractCegarLoop]: Abstraction has 116193 states and 549849 transitions. [2020-10-15 23:04:55,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 23:04:55,244 INFO L276 IsEmpty]: Start isEmpty. Operand 116193 states and 549849 transitions. [2020-10-15 23:04:55,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-15 23:04:55,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:04:55,245 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:04:55,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:04:55,446 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:04:55,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:04:55,447 INFO L82 PathProgramCache]: Analyzing trace with hash 173719339, now seen corresponding path program 1 times [2020-10-15 23:04:55,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:04:55,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090842695] [2020-10-15 23:04:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:04:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:04:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 23:04:55,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090842695] [2020-10-15 23:04:55,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245356045] [2020-10-15 23:04:55,489 INFO L95 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 [2020-10-15 23:04:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:04:55,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-15 23:04:55,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:04:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 23:04:55,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:04:55,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-15 23:04:55,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873729713] [2020-10-15 23:04:55,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 23:04:55,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:04:55,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 23:04:55,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-15 23:04:55,618 INFO L87 Difference]: Start difference. First operand 116193 states and 549849 transitions. Second operand 8 states. [2020-10-15 23:04:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:04:56,271 INFO L93 Difference]: Finished difference Result 116177 states and 549793 transitions. [2020-10-15 23:04:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 23:04:56,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-15 23:04:56,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:04:56,638 INFO L225 Difference]: With dead ends: 116177 [2020-10-15 23:04:56,638 INFO L226 Difference]: Without dead ends: 116177 [2020-10-15 23:04:56,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-15 23:05:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116177 states. [2020-10-15 23:05:06,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116177 to 116177. [2020-10-15 23:05:06,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116177 states. [2020-10-15 23:05:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116177 states to 116177 states and 549793 transitions. [2020-10-15 23:05:07,150 INFO L78 Accepts]: Start accepts. Automaton has 116177 states and 549793 transitions. Word has length 20 [2020-10-15 23:05:07,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:05:07,150 INFO L481 AbstractCegarLoop]: Abstraction has 116177 states and 549793 transitions. [2020-10-15 23:05:07,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 23:05:07,150 INFO L276 IsEmpty]: Start isEmpty. Operand 116177 states and 549793 transitions. [2020-10-15 23:05:07,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-15 23:05:07,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:05:07,156 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:05:07,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-15 23:05:07,370 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:05:07,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:05:07,370 INFO L82 PathProgramCache]: Analyzing trace with hash -999416206, now seen corresponding path program 1 times [2020-10-15 23:05:07,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:05:07,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055938514] [2020-10-15 23:05:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:05:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:05:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 23:05:07,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055938514] [2020-10-15 23:05:07,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117184151] [2020-10-15 23:05:07,415 INFO L95 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 [2020-10-15 23:05:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:05:07,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-15 23:05:07,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-15 23:05:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 23:05:07,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-15 23:05:07,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-15 23:05:07,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847350288] [2020-10-15 23:05:07,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 23:05:07,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:05:07,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 23:05:07,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-15 23:05:07,534 INFO L87 Difference]: Start difference. First operand 116177 states and 549793 transitions. Second operand 10 states. [2020-10-15 23:05:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 23:05:08,393 INFO L93 Difference]: Finished difference Result 116113 states and 549521 transitions. [2020-10-15 23:05:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 23:05:08,394 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-15 23:05:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 23:05:08,750 INFO L225 Difference]: With dead ends: 116113 [2020-10-15 23:05:08,750 INFO L226 Difference]: Without dead ends: 116113 [2020-10-15 23:05:08,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-15 23:05:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116113 states. [2020-10-15 23:05:13,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116113 to 116113. [2020-10-15 23:05:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116113 states. [2020-10-15 23:05:14,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116113 states to 116113 states and 549521 transitions. [2020-10-15 23:05:14,304 INFO L78 Accepts]: Start accepts. Automaton has 116113 states and 549521 transitions. Word has length 24 [2020-10-15 23:05:14,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 23:05:14,305 INFO L481 AbstractCegarLoop]: Abstraction has 116113 states and 549521 transitions. [2020-10-15 23:05:14,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 23:05:14,305 INFO L276 IsEmpty]: Start isEmpty. Operand 116113 states and 549521 transitions. [2020-10-15 23:05:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-15 23:05:14,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:05:14,320 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 23:05:14,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-15 23:05:14,534 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:05:14,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:05:14,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1963695170, now seen corresponding path program 1 times [2020-10-15 23:05:14,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:05:14,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094031492] [2020-10-15 23:05:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:05:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 23:05:14,548 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 23:05:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-15 23:05:14,557 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-15 23:05:14,563 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-15 23:05:14,564 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-15 23:05:14,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 23:05:14,564 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-15 23:05:14,565 WARN L371 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-15 23:05:14,565 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-10-15 23:05:14,573 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,574 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,574 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,574 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,574 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,574 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,574 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,575 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,575 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,575 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,575 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,575 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,575 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,575 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,576 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,576 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,576 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,576 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,576 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,576 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,576 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,577 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,577 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,577 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,577 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,577 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,577 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,577 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,578 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,578 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,578 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,578 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,578 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,578 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,578 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,579 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,579 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,579 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,579 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,579 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,579 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,580 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,580 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,580 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,580 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,580 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,580 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,580 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,581 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,581 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,581 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,581 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,581 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,582 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,583 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,583 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,583 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,583 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,583 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,584 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,584 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,584 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,585 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,585 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,586 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,586 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,586 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,586 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,586 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,587 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,587 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,587 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,587 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,587 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,588 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,588 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,588 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,588 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,589 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,589 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,590 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,590 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,590 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,590 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-15 23:05:14,595 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-15 23:05:14,595 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-15 23:05:14,595 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-15 23:05:14,595 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-15 23:05:14,595 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 23:05:14,595 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 23:05:14,595 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-15 23:05:14,596 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 23:05:14,596 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 23:05:14,597 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-15 23:05:14,597 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 113 transitions, 324 flow [2020-10-15 23:05:14,597 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 113 transitions, 324 flow [2020-10-15 23:05:14,597 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 115 places, 113 transitions, 324 flow [2020-10-15 23:05:16,837 INFO L129 PetriNetUnfolder]: 849/4546 cut-off events. [2020-10-15 23:05:16,838 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-15 23:05:16,862 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5044 conditions, 4546 events. 849/4546 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 38350 event pairs, 201 based on Foata normal form. 0/3761 useless extension candidates. Maximal degree in co-relation 2509. Up to 448 conditions per place. [2020-10-15 23:05:16,957 INFO L117 LiptonReduction]: Number of co-enabled transitions 4550 [2020-10-15 23:05:18,906 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-15 23:05:18,995 INFO L132 LiptonReduction]: Checked pairs total: 19547 [2020-10-15 23:05:18,995 INFO L134 LiptonReduction]: Total number of compositions: 80 [2020-10-15 23:05:18,996 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 48 transitions, 194 flow [2020-10-15 23:16:43,546 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 617870 states. [2020-10-15 23:16:43,547 INFO L276 IsEmpty]: Start isEmpty. Operand 617870 states. [2020-10-15 23:16:43,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-10-15 23:16:43,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 23:16:43,547 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-10-15 23:16:43,547 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 23:16:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 23:16:43,548 INFO L82 PathProgramCache]: Analyzing trace with hash 41370148, now seen corresponding path program 1 times [2020-10-15 23:16:43,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-15 23:16:43,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771510556] [2020-10-15 23:16:43,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 23:16:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 23:16:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 23:16:43,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771510556] [2020-10-15 23:16:43,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 23:16:43,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-15 23:16:43,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478013101] [2020-10-15 23:16:43,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-15 23:16:43,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-15 23:16:43,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-15 23:16:43,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-15 23:16:43,564 INFO L87 Difference]: Start difference. First operand 617870 states. Second operand 3 states.