/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 20:26:09,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 20:26:09,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 20:26:09,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 20:26:09,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 20:26:09,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 20:26:09,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 20:26:09,432 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 20:26:09,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 20:26:09,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 20:26:09,437 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 20:26:09,439 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 20:26:09,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 20:26:09,441 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 20:26:09,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 20:26:09,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 20:26:09,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 20:26:09,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 20:26:09,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 20:26:09,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 20:26:09,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 20:26:09,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 20:26:09,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 20:26:09,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 20:26:09,461 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-11 20:26:09,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 20:26:09,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 20:26:09,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 20:26:09,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 20:26:09,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 20:26:09,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 20:26:09,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 20:26:09,472 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 20:26:09,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 20:26:09,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 20:26:09,475 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 20:26:09,476 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-11 20:26:09,522 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 20:26:09,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 20:26:09,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 20:26:09,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 20:26:09,525 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 20:26:09,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 20:26:09,526 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 20:26:09,526 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 20:26:09,526 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 20:26:09,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 20:26:09,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 20:26:09,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 20:26:09,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 20:26:09,529 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 20:26:09,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 20:26:09,530 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 20:26:09,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 20:26:09,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 20:26:09,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 20:26:09,531 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 20:26:09,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 20:26:09,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 20:26:09,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 20:26:09,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-11 20:26:09,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 20:26:09,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 20:26:09,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 20:26:09,533 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-11 20:26:09,533 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-11 20:26:09,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 20:26:09,533 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-11 20:26:10,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 20:26:10,108 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 20:26:10,114 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 20:26:10,116 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 20:26:10,118 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 20:26:10,121 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2020-09-11 20:26:10,248 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27334a2c9/7dc8f603acfd44eba458c1033f552e69/FLAG770ea0479 [2020-09-11 20:26:11,090 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 20:26:11,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2020-09-11 20:26:11,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27334a2c9/7dc8f603acfd44eba458c1033f552e69/FLAG770ea0479 [2020-09-11 20:26:11,298 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/27334a2c9/7dc8f603acfd44eba458c1033f552e69 [2020-09-11 20:26:11,317 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 20:26:11,324 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 20:26:11,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 20:26:11,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 20:26:11,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 20:26:11,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:26:11" (1/1) ... [2020-09-11 20:26:11,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3365e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:26:11, skipping insertion in model container [2020-09-11 20:26:11,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:26:11" (1/1) ... [2020-09-11 20:26:11,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 20:26:11,411 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 20:26:12,081 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 20:26:12,103 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 20:26:12,163 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 20:26:12,257 INFO L208 MainTranslator]: Completed translation [2020-09-11 20:26:12,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:26:12 WrapperNode [2020-09-11 20:26:12,258 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 20:26:12,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 20:26:12,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 20:26:12,261 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 20:26:12,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:26:12" (1/1) ... [2020-09-11 20:26:12,304 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:26:12" (1/1) ... [2020-09-11 20:26:12,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 20:26:12,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 20:26:12,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 20:26:12,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 20:26:12,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:26:12" (1/1) ... [2020-09-11 20:26:12,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:26:12" (1/1) ... [2020-09-11 20:26:12,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:26:12" (1/1) ... [2020-09-11 20:26:12,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:26:12" (1/1) ... [2020-09-11 20:26:12,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:26:12" (1/1) ... [2020-09-11 20:26:12,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:26:12" (1/1) ... [2020-09-11 20:26:12,377 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:26:12" (1/1) ... [2020-09-11 20:26:12,381 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 20:26:12,382 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 20:26:12,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 20:26:12,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 20:26:12,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:26:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-11 20:26:12,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-11 20:26:12,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 20:26:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2020-09-11 20:26:12,499 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2020-09-11 20:26:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 20:26:12,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 20:26:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 20:26:12,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 20:26:12,500 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2020-09-11 20:26:12,500 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2020-09-11 20:26:12,503 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 20:26:13,125 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 20:26:13,126 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-11 20:26:13,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:26:13 BoogieIcfgContainer [2020-09-11 20:26:13,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 20:26:13,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 20:26:13,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 20:26:13,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 20:26:13,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:26:11" (1/3) ... [2020-09-11 20:26:13,142 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328cd822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:26:13, skipping insertion in model container [2020-09-11 20:26:13,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:26:12" (2/3) ... [2020-09-11 20:26:13,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@328cd822 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:26:13, skipping insertion in model container [2020-09-11 20:26:13,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:26:13" (3/3) ... [2020-09-11 20:26:13,147 INFO L109 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2020-09-11 20:26:13,162 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 20:26:13,162 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-11 20:26:13,176 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 20:26:13,177 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 20:26:13,222 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,222 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,223 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,223 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,223 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,224 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,224 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,224 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,225 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,225 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,226 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,226 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,226 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,227 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,227 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,228 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,228 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,228 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,228 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,229 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,229 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,229 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,230 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,230 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,231 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,231 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,232 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,232 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,232 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,232 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,233 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,233 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,233 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,234 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,234 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,235 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,235 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,235 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,235 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,236 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,236 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,236 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,242 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,242 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,243 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,243 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,243 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,243 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,247 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,247 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,248 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,248 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,248 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,248 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,249 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork1_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,252 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,252 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,253 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,253 WARN L313 ript$VariableManager]: TermVariabe |writerThread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,253 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,253 WARN L313 ript$VariableManager]: TermVariabe writerThread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,256 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~l~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,257 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,257 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,257 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,258 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,258 WARN L313 ript$VariableManager]: TermVariabe readerThread1of1ForFork3_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,258 WARN L313 ript$VariableManager]: TermVariabe |readerThread1of1ForFork3_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 20:26:13,310 INFO L251 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-09-11 20:26:13,339 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 20:26:13,339 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 20:26:13,339 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-11 20:26:13,339 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-11 20:26:13,339 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 20:26:13,340 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 20:26:13,340 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 20:26:13,340 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 20:26:13,363 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 102 transitions, 272 flow [2020-09-11 20:26:13,367 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 101 places, 102 transitions, 272 flow [2020-09-11 20:26:13,458 INFO L129 PetriNetUnfolder]: 19/136 cut-off events. [2020-09-11 20:26:13,458 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-09-11 20:26:13,467 INFO L80 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 136 events. 19/136 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 329 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 93. Up to 12 conditions per place. [2020-09-11 20:26:13,475 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 101 places, 102 transitions, 272 flow [2020-09-11 20:26:13,517 INFO L129 PetriNetUnfolder]: 19/136 cut-off events. [2020-09-11 20:26:13,517 INFO L130 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2020-09-11 20:26:13,519 INFO L80 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 136 events. 19/136 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 329 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 93. Up to 12 conditions per place. [2020-09-11 20:26:13,525 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2626 [2020-09-11 20:26:13,527 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-11 20:26:15,051 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-09-11 20:26:15,212 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-09-11 20:26:15,525 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-09-11 20:26:15,665 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-09-11 20:26:15,692 INFO L206 etLargeBlockEncoding]: Checked pairs total: 8607 [2020-09-11 20:26:15,692 INFO L214 etLargeBlockEncoding]: Total number of compositions: 47 [2020-09-11 20:26:15,699 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 59 places, 59 transitions, 186 flow [2020-09-11 20:26:16,321 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 5928 states. [2020-09-11 20:26:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 5928 states. [2020-09-11 20:26:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 20:26:16,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:16,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:16,344 INFO L427 AbstractCegarLoop]: === Iteration 1 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-11 20:26:16,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:16,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1320505735, now seen corresponding path program 1 times [2020-09-11 20:26:16,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:16,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150309307] [2020-09-11 20:26:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:16,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150309307] [2020-09-11 20:26:16,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:26:16,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 20:26:16,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1957329705] [2020-09-11 20:26:16,740 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:16,745 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:16,769 INFO L274 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-09-11 20:26:16,769 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:16,773 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 20:26:16,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 20:26:16,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:16,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 20:26:16,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 20:26:16,806 INFO L87 Difference]: Start difference. First operand 5928 states. Second operand 4 states. [2020-09-11 20:26:17,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:17,184 INFO L93 Difference]: Finished difference Result 11925 states and 39965 transitions. [2020-09-11 20:26:17,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 20:26:17,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-09-11 20:26:17,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:17,298 INFO L225 Difference]: With dead ends: 11925 [2020-09-11 20:26:17,298 INFO L226 Difference]: Without dead ends: 8145 [2020-09-11 20:26:17,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 20:26:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2020-09-11 20:26:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 5365. [2020-09-11 20:26:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5365 states. [2020-09-11 20:26:17,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5365 states to 5365 states and 18240 transitions. [2020-09-11 20:26:17,867 INFO L78 Accepts]: Start accepts. Automaton has 5365 states and 18240 transitions. Word has length 8 [2020-09-11 20:26:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:17,868 INFO L479 AbstractCegarLoop]: Abstraction has 5365 states and 18240 transitions. [2020-09-11 20:26:17,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 20:26:17,869 INFO L276 IsEmpty]: Start isEmpty. Operand 5365 states and 18240 transitions. [2020-09-11 20:26:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 20:26:17,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:17,871 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:17,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 20:26:17,872 INFO L427 AbstractCegarLoop]: === Iteration 2 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-11 20:26:17,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:17,873 INFO L82 PathProgramCache]: Analyzing trace with hash 549618854, now seen corresponding path program 1 times [2020-09-11 20:26:17,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:17,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420602900] [2020-09-11 20:26:17,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:17,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420602900] [2020-09-11 20:26:17,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:26:17,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 20:26:17,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1969479233] [2020-09-11 20:26:17,964 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:17,966 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:17,970 INFO L274 McrAutomatonBuilder]: Finished intersection with 14 states and 16 transitions. [2020-09-11 20:26:17,971 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:18,011 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 20:26:18,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-11 20:26:18,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:18,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-11 20:26:18,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 20:26:18,015 INFO L87 Difference]: Start difference. First operand 5365 states and 18240 transitions. Second operand 3 states. [2020-09-11 20:26:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:18,130 INFO L93 Difference]: Finished difference Result 4584 states and 13790 transitions. [2020-09-11 20:26:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-11 20:26:18,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-09-11 20:26:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:18,170 INFO L225 Difference]: With dead ends: 4584 [2020-09-11 20:26:18,170 INFO L226 Difference]: Without dead ends: 4532 [2020-09-11 20:26:18,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-11 20:26:18,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4532 states. [2020-09-11 20:26:18,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4532 to 4532. [2020-09-11 20:26:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4532 states. [2020-09-11 20:26:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4532 states to 4532 states and 13652 transitions. [2020-09-11 20:26:18,351 INFO L78 Accepts]: Start accepts. Automaton has 4532 states and 13652 transitions. Word has length 10 [2020-09-11 20:26:18,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:18,351 INFO L479 AbstractCegarLoop]: Abstraction has 4532 states and 13652 transitions. [2020-09-11 20:26:18,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-11 20:26:18,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4532 states and 13652 transitions. [2020-09-11 20:26:18,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 20:26:18,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:18,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:18,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 20:26:18,354 INFO L427 AbstractCegarLoop]: === Iteration 3 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-11 20:26:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:18,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1990636334, now seen corresponding path program 2 times [2020-09-11 20:26:18,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:18,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634286945] [2020-09-11 20:26:18,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:18,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:18,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634286945] [2020-09-11 20:26:18,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:26:18,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 20:26:18,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [661949565] [2020-09-11 20:26:18,432 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:18,433 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:18,434 INFO L274 McrAutomatonBuilder]: Finished intersection with 14 states and 16 transitions. [2020-09-11 20:26:18,434 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:18,436 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 20:26:18,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 20:26:18,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:18,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 20:26:18,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 20:26:18,437 INFO L87 Difference]: Start difference. First operand 4532 states and 13652 transitions. Second operand 4 states. [2020-09-11 20:26:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:18,525 INFO L93 Difference]: Finished difference Result 3000 states and 7221 transitions. [2020-09-11 20:26:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 20:26:18,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-09-11 20:26:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:18,547 INFO L225 Difference]: With dead ends: 3000 [2020-09-11 20:26:18,547 INFO L226 Difference]: Without dead ends: 2844 [2020-09-11 20:26:18,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 20:26:18,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2020-09-11 20:26:18,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2436. [2020-09-11 20:26:18,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2436 states. [2020-09-11 20:26:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 6018 transitions. [2020-09-11 20:26:18,722 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 6018 transitions. Word has length 10 [2020-09-11 20:26:18,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:18,722 INFO L479 AbstractCegarLoop]: Abstraction has 2436 states and 6018 transitions. [2020-09-11 20:26:18,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 20:26:18,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 6018 transitions. [2020-09-11 20:26:18,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 20:26:18,724 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:18,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:18,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 20:26:18,725 INFO L427 AbstractCegarLoop]: === Iteration 4 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-11 20:26:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:18,726 INFO L82 PathProgramCache]: Analyzing trace with hash -670514015, now seen corresponding path program 1 times [2020-09-11 20:26:18,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:18,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541985752] [2020-09-11 20:26:18,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:18,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541985752] [2020-09-11 20:26:18,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:26:18,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 20:26:18,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1980107309] [2020-09-11 20:26:18,807 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:18,817 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:18,819 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 12 transitions. [2020-09-11 20:26:18,820 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:18,820 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 20:26:18,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 20:26:18,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:18,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 20:26:18,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 20:26:18,822 INFO L87 Difference]: Start difference. First operand 2436 states and 6018 transitions. Second operand 4 states. [2020-09-11 20:26:18,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:18,916 INFO L93 Difference]: Finished difference Result 2639 states and 6454 transitions. [2020-09-11 20:26:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 20:26:18,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-09-11 20:26:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:18,924 INFO L225 Difference]: With dead ends: 2639 [2020-09-11 20:26:18,924 INFO L226 Difference]: Without dead ends: 1900 [2020-09-11 20:26:18,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 20:26:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-09-11 20:26:18,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1546. [2020-09-11 20:26:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1546 states. [2020-09-11 20:26:18,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3824 transitions. [2020-09-11 20:26:18,976 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3824 transitions. Word has length 12 [2020-09-11 20:26:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:18,978 INFO L479 AbstractCegarLoop]: Abstraction has 1546 states and 3824 transitions. [2020-09-11 20:26:18,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 20:26:18,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3824 transitions. [2020-09-11 20:26:18,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 20:26:18,983 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:18,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:18,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 20:26:18,984 INFO L427 AbstractCegarLoop]: === Iteration 5 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-11 20:26:18,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:18,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1513944994, now seen corresponding path program 1 times [2020-09-11 20:26:18,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:18,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852701998] [2020-09-11 20:26:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:19,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:19,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852701998] [2020-09-11 20:26:19,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:26:19,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-11 20:26:19,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [555025942] [2020-09-11 20:26:19,153 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:19,159 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:19,168 INFO L274 McrAutomatonBuilder]: Finished intersection with 47 states and 71 transitions. [2020-09-11 20:26:19,168 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:19,328 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [61891#(<= 0 ~r~0)] [2020-09-11 20:26:19,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 20:26:19,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:19,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 20:26:19,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-11 20:26:19,330 INFO L87 Difference]: Start difference. First operand 1546 states and 3824 transitions. Second operand 7 states. [2020-09-11 20:26:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:19,435 INFO L93 Difference]: Finished difference Result 1795 states and 4395 transitions. [2020-09-11 20:26:19,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 20:26:19,435 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-11 20:26:19,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:19,442 INFO L225 Difference]: With dead ends: 1795 [2020-09-11 20:26:19,442 INFO L226 Difference]: Without dead ends: 1642 [2020-09-11 20:26:19,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 20:26:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2020-09-11 20:26:19,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1510. [2020-09-11 20:26:19,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1510 states. [2020-09-11 20:26:19,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 3689 transitions. [2020-09-11 20:26:19,487 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 3689 transitions. Word has length 20 [2020-09-11 20:26:19,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:19,487 INFO L479 AbstractCegarLoop]: Abstraction has 1510 states and 3689 transitions. [2020-09-11 20:26:19,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 20:26:19,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 3689 transitions. [2020-09-11 20:26:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 20:26:19,489 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:19,490 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:19,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-11 20:26:19,490 INFO L427 AbstractCegarLoop]: === Iteration 6 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-11 20:26:19,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:19,491 INFO L82 PathProgramCache]: Analyzing trace with hash 451095645, now seen corresponding path program 1 times [2020-09-11 20:26:19,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:19,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593550583] [2020-09-11 20:26:19,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 20:26:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 20:26:19,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593550583] [2020-09-11 20:26:19,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 20:26:19,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-11 20:26:19,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1474939402] [2020-09-11 20:26:19,576 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 20:26:19,579 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 20:26:19,588 INFO L274 McrAutomatonBuilder]: Finished intersection with 53 states and 78 transitions. [2020-09-11 20:26:19,588 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 20:26:19,644 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [66717#(<= 0 ~r~0)] [2020-09-11 20:26:19,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 20:26:19,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 20:26:19,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 20:26:19,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-11 20:26:19,646 INFO L87 Difference]: Start difference. First operand 1510 states and 3689 transitions. Second operand 7 states. [2020-09-11 20:26:19,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 20:26:19,778 INFO L93 Difference]: Finished difference Result 1759 states and 4260 transitions. [2020-09-11 20:26:19,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 20:26:19,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-09-11 20:26:19,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 20:26:19,785 INFO L225 Difference]: With dead ends: 1759 [2020-09-11 20:26:19,785 INFO L226 Difference]: Without dead ends: 1498 [2020-09-11 20:26:19,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-11 20:26:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-09-11 20:26:19,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1366. [2020-09-11 20:26:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1366 states. [2020-09-11 20:26:19,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 3257 transitions. [2020-09-11 20:26:19,827 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 3257 transitions. Word has length 20 [2020-09-11 20:26:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 20:26:19,827 INFO L479 AbstractCegarLoop]: Abstraction has 1366 states and 3257 transitions. [2020-09-11 20:26:19,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 20:26:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 3257 transitions. [2020-09-11 20:26:19,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 20:26:19,879 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 20:26:19,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 20:26:19,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-11 20:26:19,880 INFO L427 AbstractCegarLoop]: === Iteration 7 === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-09-11 20:26:19,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 20:26:19,881 INFO L82 PathProgramCache]: Analyzing trace with hash -875832079, now seen corresponding path program 2 times [2020-09-11 20:26:19,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 20:26:19,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136837758] [2020-09-11 20:26:19,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 20:26:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-11 20:26:19,903 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-11 20:26:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-11 20:26:19,922 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-11 20:26:19,963 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-11 20:26:19,964 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-11 20:26:19,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-11 20:26:19,965 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-11 20:26:19,973 WARN L123 codingBacktranslator]: Skipped backtranslation of ATE [287] [287] L697-->L697-3: Formula: (= ~y~0_In-483382809 ~x~0_In-483382809) InVars {~y~0=~y~0_In-483382809, ~x~0=~x~0_In-483382809} OutVars{~y~0=~y~0_In-483382809, ~x~0=~x~0_In-483382809} AuxVars[] AssignedVars[] because there is no mapped edge [2020-09-11 20:26:19,980 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-09-11 20:26:19,981 WARN L224 RCFGBacktranslator]: unable to determine which branch was taken at C: __VERIFIER_atomic_take_read_lock() [694] [2020-09-11 20:26:19,983 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-09-11 20:26:19,983 WARN L224 RCFGBacktranslator]: unable to determine which branch was taken at C: __VERIFIER_atomic_take_read_lock() [694] [2020-09-11 20:26:19,984 WARN L219 RCFGBacktranslator]: You are using large block encoding together with an algorithm for which the backtranslation into program statements is not yet implemented. [2020-09-11 20:26:19,984 WARN L224 RCFGBacktranslator]: unable to determine which branch was taken at C: __VERIFIER_atomic_take_write_lock() [687] [2020-09-11 20:26:20,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 08:26:20 BasicIcfg [2020-09-11 20:26:20,021 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 20:26:20,023 INFO L168 Benchmark]: Toolchain (without parser) took 8704.52 ms. Allocated memory was 140.0 MB in the beginning and 363.9 MB in the end (delta: 223.9 MB). Free memory was 102.0 MB in the beginning and 284.7 MB in the end (delta: -182.7 MB). Peak memory consumption was 41.2 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:20,024 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 140.0 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 20:26:20,026 INFO L168 Benchmark]: CACSL2BoogieTranslator took 934.07 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 101.3 MB in the beginning and 164.3 MB in the end (delta: -63.0 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:20,027 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.16 ms. Allocated memory is still 203.9 MB. Free memory was 163.6 MB in the beginning and 161.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:20,028 INFO L168 Benchmark]: Boogie Preprocessor took 39.34 ms. Allocated memory is still 203.9 MB. Free memory was 161.6 MB in the beginning and 160.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:20,029 INFO L168 Benchmark]: RCFGBuilder took 750.12 ms. Allocated memory is still 203.9 MB. Free memory was 160.3 MB in the beginning and 127.9 MB in the end (delta: 32.3 MB). Peak memory consumption was 32.3 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:20,030 INFO L168 Benchmark]: TraceAbstraction took 6886.83 ms. Allocated memory was 203.9 MB in the beginning and 363.9 MB in the end (delta: 159.9 MB). Free memory was 127.9 MB in the beginning and 284.7 MB in the end (delta: -156.7 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-09-11 20:26:20,034 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 140.0 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 934.07 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 101.3 MB in the beginning and 164.3 MB in the end (delta: -63.0 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 82.16 ms. Allocated memory is still 203.9 MB. Free memory was 163.6 MB in the beginning and 161.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 39.34 ms. Allocated memory is still 203.9 MB. Free memory was 161.6 MB in the beginning and 160.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 750.12 ms. Allocated memory is still 203.9 MB. Free memory was 160.3 MB in the beginning and 127.9 MB in the end (delta: 32.3 MB). Peak memory consumption was 32.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6886.83 ms. Allocated memory was 203.9 MB in the beginning and 363.9 MB in the end (delta: 159.9 MB). Free memory was 127.9 MB in the beginning and 284.7 MB in the end (delta: -156.7 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 2.3s, 101 ProgramPointsBefore, 59 ProgramPointsAfterwards, 102 TransitionsBefore, 59 TransitionsAfterwards, 2626 CoEnabledTransitionPairs, 6 FixpointIterations, 23 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 1 ChoiceCompositions, 1072 VarBasedMoverChecksPositive, 41 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 8607 CheckedPairsTotal, 47 TotalNumberOfCompositions - CounterExampleResult [Line: 697]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L677] 0 int w=0, r=0, x, y; [L703] 0 pthread_t t1, t2, t3, t4; [L704] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [r=0, w=0, x=0, y=0] [L705] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [r=0, w=0, x=0, y=0] [L693] 2 int l; [L694] CALL 2 __VERIFIER_atomic_take_read_lock() [L683] CALL 2 assume_abort_if_not(w==0) [L3] COND TRUE 2 !cond [L683] RET 2 assume_abort_if_not(w==0) [L684] 2 r = r+1 [L694] RET 2 __VERIFIER_atomic_take_read_lock() [L695] 2 l = x VAL [r=1, w=0, x=0, y=0] [L706] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [r=1, w=0, x=0, y=0] [L707] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [r=1, w=0, x=0, y=0] [L696] 2 y = l VAL [r=1, w=0, x=0, y=0] [L698] 2 l = r-1 VAL [r=1, w=0, x=0, y=0] [L693] 4 int l; [L694] CALL 4 __VERIFIER_atomic_take_read_lock() [L683] CALL 4 assume_abort_if_not(w==0) [L3] COND TRUE 4 !cond [L683] RET 4 assume_abort_if_not(w==0) [L684] 4 r = r+1 [L694] RET 4 __VERIFIER_atomic_take_read_lock() [L695] 4 l = x VAL [r=2, w=0, x=0, y=0] [L696] 4 y = l VAL [r=2, w=0, x=0, y=0] [L699] 2 r = l [L700] 2 return 0; [L687] CALL 3 __VERIFIER_atomic_take_write_lock() [L679] CALL 3 assume_abort_if_not(w==0 && r==0) [L3] COND TRUE 3 !cond [L679] RET 3 assume_abort_if_not(w==0 && r==0) [L680] 3 w = 1 [L687] RET 3 __VERIFIER_atomic_take_write_lock() [L688] 3 x = 3 VAL [r=0, w=1, x=3, y=0] [L697] COND TRUE 4 !(y == x) [L697] 4 __VERIFIER_error() VAL [r=0, w=1, x=3, y=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 69 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.6s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 515 SDtfs, 480 SDslu, 800 SDs, 0 SdLazy, 230 SolverSat, 46 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5928occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 3806 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 100 NumberOfCodeBlocks, 100 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 2598 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...