/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-nondet/nondet-array-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-18 02:58:36,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-18 02:58:36,565 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-18 02:58:36,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-18 02:58:36,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-18 02:58:36,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-18 02:58:36,631 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-18 02:58:36,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-18 02:58:36,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-18 02:58:36,644 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-18 02:58:36,645 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-18 02:58:36,647 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-18 02:58:36,647 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-18 02:58:36,652 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-18 02:58:36,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-18 02:58:36,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-18 02:58:36,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-18 02:58:36,661 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-18 02:58:36,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-18 02:58:36,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-18 02:58:36,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-18 02:58:36,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-18 02:58:36,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-18 02:58:36,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-18 02:58:36,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-18 02:58:36,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-18 02:58:36,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-18 02:58:36,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-18 02:58:36,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-18 02:58:36,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-18 02:58:36,700 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-18 02:58:36,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-18 02:58:36,708 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-18 02:58:36,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-18 02:58:36,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-18 02:58:36,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-18 02:58:36,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-18 02:58:36,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-18 02:58:36,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-18 02:58:36,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-18 02:58:36,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-18 02:58:36,720 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-18 02:58:36,771 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-18 02:58:36,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-18 02:58:36,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-18 02:58:36,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-18 02:58:36,775 INFO L138 SettingsManager]: * Use SBE=true [2020-09-18 02:58:36,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-18 02:58:36,775 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-18 02:58:36,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-18 02:58:36,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-18 02:58:36,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-18 02:58:36,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-18 02:58:36,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-18 02:58:36,778 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-18 02:58:36,778 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-18 02:58:36,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-18 02:58:36,779 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-18 02:58:36,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-18 02:58:36,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-18 02:58:36,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-18 02:58:36,780 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-18 02:58:36,780 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-18 02:58:36,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-18 02:58:36,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-18 02:58:36,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-18 02:58:36,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-18 02:58:36,781 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-18 02:58:36,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-18 02:58:36,781 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-18 02:58:36,781 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-18 02:58:36,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-18 02:58:36,782 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-18 02:58:37,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-18 02:58:37,335 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-18 02:58:37,339 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-18 02:58:37,342 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-18 02:58:37,342 INFO L275 PluginConnector]: CDTParser initialized [2020-09-18 02:58:37,343 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-nondet/nondet-array-1.i [2020-09-18 02:58:37,461 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc7b38e5a/4d46b25a27ec44f9931819d823b32108/FLAG2e9f0edee [2020-09-18 02:58:38,118 INFO L306 CDTParser]: Found 1 translation units. [2020-09-18 02:58:38,120 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-nondet/nondet-array-1.i [2020-09-18 02:58:38,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc7b38e5a/4d46b25a27ec44f9931819d823b32108/FLAG2e9f0edee [2020-09-18 02:58:38,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc7b38e5a/4d46b25a27ec44f9931819d823b32108 [2020-09-18 02:58:38,437 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-18 02:58:38,445 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-18 02:58:38,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-18 02:58:38,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-18 02:58:38,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-18 02:58:38,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 02:58:38" (1/1) ... [2020-09-18 02:58:38,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@599361e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:58:38, skipping insertion in model container [2020-09-18 02:58:38,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 02:58:38" (1/1) ... [2020-09-18 02:58:38,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-18 02:58:38,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-18 02:58:39,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-18 02:58:39,172 INFO L203 MainTranslator]: Completed pre-run [2020-09-18 02:58:39,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-18 02:58:39,366 INFO L208 MainTranslator]: Completed translation [2020-09-18 02:58:39,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:58:39 WrapperNode [2020-09-18 02:58:39,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-18 02:58:39,368 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-18 02:58:39,368 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-18 02:58:39,369 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-18 02:58:39,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:58:39" (1/1) ... [2020-09-18 02:58:39,404 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:58:39" (1/1) ... [2020-09-18 02:58:39,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-18 02:58:39,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-18 02:58:39,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-18 02:58:39,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-18 02:58:39,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:58:39" (1/1) ... [2020-09-18 02:58:39,458 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:58:39" (1/1) ... [2020-09-18 02:58:39,461 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:58:39" (1/1) ... [2020-09-18 02:58:39,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:58:39" (1/1) ... [2020-09-18 02:58:39,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:58:39" (1/1) ... [2020-09-18 02:58:39,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:58:39" (1/1) ... [2020-09-18 02:58:39,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:58:39" (1/1) ... [2020-09-18 02:58:39,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-18 02:58:39,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-18 02:58:39,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-18 02:58:39,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-18 02:58:39,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:58:39" (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 [2020-09-18 02:58:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-09-18 02:58:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-18 02:58:39,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-18 02:58:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2020-09-18 02:58:39,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2020-09-18 02:58:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-18 02:58:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-18 02:58:39,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-18 02:58:39,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-18 02:58:39,595 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-18 02:58:40,021 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-18 02:58:40,022 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-09-18 02:58:40,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 02:58:40 BoogieIcfgContainer [2020-09-18 02:58:40,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-18 02:58:40,029 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-18 02:58:40,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-18 02:58:40,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-18 02:58:40,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 02:58:38" (1/3) ... [2020-09-18 02:58:40,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34490a97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 02:58:40, skipping insertion in model container [2020-09-18 02:58:40,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 02:58:39" (2/3) ... [2020-09-18 02:58:40,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34490a97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 02:58:40, skipping insertion in model container [2020-09-18 02:58:40,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 02:58:40" (3/3) ... [2020-09-18 02:58:40,040 INFO L109 eAbstractionObserver]: Analyzing ICFG nondet-array-1.i [2020-09-18 02:58:40,054 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-18 02:58:40,055 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-18 02:58:40,067 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-18 02:58:40,069 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-18 02:58:40,099 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:40,100 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:40,100 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:40,100 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:40,101 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:40,101 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:40,101 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:40,106 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:40,106 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:40,107 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:40,107 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:40,107 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:40,139 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-18 02:58:40,166 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-18 02:58:40,166 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-18 02:58:40,167 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-18 02:58:40,167 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-18 02:58:40,167 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-18 02:58:40,167 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-18 02:58:40,167 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-18 02:58:40,168 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-18 02:58:40,188 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 71 transitions, 150 flow [2020-09-18 02:58:40,191 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 71 transitions, 150 flow [2020-09-18 02:58:40,254 INFO L129 PetriNetUnfolder]: 12/103 cut-off events. [2020-09-18 02:58:40,255 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-18 02:58:40,261 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. [2020-09-18 02:58:40,264 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 71 transitions, 150 flow [2020-09-18 02:58:40,298 INFO L129 PetriNetUnfolder]: 12/103 cut-off events. [2020-09-18 02:58:40,299 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-09-18 02:58:40,300 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. [2020-09-18 02:58:40,302 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 370 [2020-09-18 02:58:40,303 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-18 02:58:41,810 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-09-18 02:58:42,062 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-09-18 02:58:42,243 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-09-18 02:58:42,331 INFO L206 etLargeBlockEncoding]: Checked pairs total: 264 [2020-09-18 02:58:42,332 INFO L214 etLargeBlockEncoding]: Total number of compositions: 66 [2020-09-18 02:58:42,337 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 15 places, 14 transitions, 36 flow [2020-09-18 02:58:42,349 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 27 states. [2020-09-18 02:58:42,352 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-09-18 02:58:42,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-09-18 02:58:42,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:42,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-09-18 02:58:42,363 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:42,371 INFO L82 PathProgramCache]: Analyzing trace with hash 8680406, now seen corresponding path program 1 times [2020-09-18 02:58:42,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:42,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826763753] [2020-09-18 02:58:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:42,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826763753] [2020-09-18 02:58:42,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-18 02:58:42,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-18 02:58:42,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [366730703] [2020-09-18 02:58:42,609 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:58:42,613 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:58:42,631 INFO L274 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-09-18 02:58:42,631 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:58:42,633 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:58:42,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-18 02:58:42,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:58:42,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-18 02:58:42,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-18 02:58:42,658 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2020-09-18 02:58:42,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:58:42,700 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2020-09-18 02:58:42,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-18 02:58:42,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-09-18 02:58:42,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:58:42,716 INFO L225 Difference]: With dead ends: 27 [2020-09-18 02:58:42,717 INFO L226 Difference]: Without dead ends: 23 [2020-09-18 02:58:42,719 INFO L675 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 [2020-09-18 02:58:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-18 02:58:42,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-09-18 02:58:42,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-18 02:58:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2020-09-18 02:58:42,767 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 4 [2020-09-18 02:58:42,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:58:42,767 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2020-09-18 02:58:42,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-18 02:58:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2020-09-18 02:58:42,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-18 02:58:42,768 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:42,768 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2020-09-18 02:58:42,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-18 02:58:42,769 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:42,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:42,770 INFO L82 PathProgramCache]: Analyzing trace with hash -256835414, now seen corresponding path program 1 times [2020-09-18 02:58:42,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:42,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971166081] [2020-09-18 02:58:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-18 02:58:42,806 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-18 02:58:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-18 02:58:42,831 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-18 02:58:42,863 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-18 02:58:42,863 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-18 02:58:42,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-18 02:58:42,865 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-18 02:58:42,867 WARN L363 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-18 02:58:42,867 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-09-18 02:58:42,877 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,877 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,877 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,878 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,878 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,878 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,879 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,879 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,879 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,879 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,879 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,880 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,880 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,880 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,881 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,881 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,881 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,881 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,881 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,886 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,887 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,887 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,887 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,887 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:42,893 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-18 02:58:42,894 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-18 02:58:42,894 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-18 02:58:42,894 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-18 02:58:42,894 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-18 02:58:42,895 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-18 02:58:42,895 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-18 02:58:42,895 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-18 02:58:42,895 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-18 02:58:42,898 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 78 transitions, 174 flow [2020-09-18 02:58:42,898 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 174 flow [2020-09-18 02:58:42,936 INFO L129 PetriNetUnfolder]: 23/183 cut-off events. [2020-09-18 02:58:42,937 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-09-18 02:58:42,937 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. [2020-09-18 02:58:42,941 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 174 flow [2020-09-18 02:58:42,990 INFO L129 PetriNetUnfolder]: 23/183 cut-off events. [2020-09-18 02:58:42,990 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-09-18 02:58:42,991 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. [2020-09-18 02:58:42,996 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 900 [2020-09-18 02:58:42,996 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-18 02:58:44,290 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-09-18 02:58:44,617 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-09-18 02:58:44,739 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-09-18 02:58:44,918 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-09-18 02:58:45,010 INFO L206 etLargeBlockEncoding]: Checked pairs total: 1723 [2020-09-18 02:58:45,011 INFO L214 etLargeBlockEncoding]: Total number of compositions: 62 [2020-09-18 02:58:45,011 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 23 transitions, 64 flow [2020-09-18 02:58:45,024 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 242 states. [2020-09-18 02:58:45,025 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states. [2020-09-18 02:58:45,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-09-18 02:58:45,025 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:45,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-09-18 02:58:45,026 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:45,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:45,026 INFO L82 PathProgramCache]: Analyzing trace with hash 13452069, now seen corresponding path program 1 times [2020-09-18 02:58:45,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:45,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716412246] [2020-09-18 02:58:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:45,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:45,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716412246] [2020-09-18 02:58:45,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-18 02:58:45,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-18 02:58:45,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [947243686] [2020-09-18 02:58:45,094 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:58:45,097 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:58:45,098 INFO L274 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-09-18 02:58:45,099 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:58:45,099 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:58:45,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-18 02:58:45,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:58:45,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-18 02:58:45,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-18 02:58:45,102 INFO L87 Difference]: Start difference. First operand 242 states. Second operand 3 states. [2020-09-18 02:58:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:58:45,154 INFO L93 Difference]: Finished difference Result 242 states and 550 transitions. [2020-09-18 02:58:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-18 02:58:45,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-09-18 02:58:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:58:45,162 INFO L225 Difference]: With dead ends: 242 [2020-09-18 02:58:45,163 INFO L226 Difference]: Without dead ends: 216 [2020-09-18 02:58:45,163 INFO L675 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 [2020-09-18 02:58:45,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-18 02:58:45,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-09-18 02:58:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-18 02:58:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 494 transitions. [2020-09-18 02:58:45,197 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 494 transitions. Word has length 4 [2020-09-18 02:58:45,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:58:45,198 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 494 transitions. [2020-09-18 02:58:45,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-18 02:58:45,198 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 494 transitions. [2020-09-18 02:58:45,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-18 02:58:45,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:45,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:58:45,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-18 02:58:45,200 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:45,201 INFO L82 PathProgramCache]: Analyzing trace with hash 76722491, now seen corresponding path program 1 times [2020-09-18 02:58:45,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:45,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634968264] [2020-09-18 02:58:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:45,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634968264] [2020-09-18 02:58:45,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552720644] [2020-09-18 02:58:45,269 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 [2020-09-18 02:58:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:45,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-18 02:58:45,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:58:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:45,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:58:45,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-09-18 02:58:45,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [275360685] [2020-09-18 02:58:45,417 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:58:45,418 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:58:45,422 INFO L274 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-09-18 02:58:45,424 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:58:45,425 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:58:45,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-18 02:58:45,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:58:45,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-18 02:58:45,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-18 02:58:45,429 INFO L87 Difference]: Start difference. First operand 216 states and 494 transitions. Second operand 6 states. [2020-09-18 02:58:45,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:58:45,488 INFO L93 Difference]: Finished difference Result 216 states and 490 transitions. [2020-09-18 02:58:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-18 02:58:45,490 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-09-18 02:58:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:58:45,494 INFO L225 Difference]: With dead ends: 216 [2020-09-18 02:58:45,494 INFO L226 Difference]: Without dead ends: 216 [2020-09-18 02:58:45,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-18 02:58:45,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-18 02:58:45,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-09-18 02:58:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-18 02:58:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 490 transitions. [2020-09-18 02:58:45,517 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 490 transitions. Word has length 8 [2020-09-18 02:58:45,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:58:45,517 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 490 transitions. [2020-09-18 02:58:45,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-18 02:58:45,518 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 490 transitions. [2020-09-18 02:58:45,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-18 02:58:45,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:45,519 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2020-09-18 02:58:45,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:58:45,733 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:45,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:45,734 INFO L82 PathProgramCache]: Analyzing trace with hash 94633273, now seen corresponding path program 1 times [2020-09-18 02:58:45,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:45,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658835159] [2020-09-18 02:58:45,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:45,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-18 02:58:45,789 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-18 02:58:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-18 02:58:45,829 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-18 02:58:45,846 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-18 02:58:45,846 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-18 02:58:45,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-18 02:58:45,847 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-18 02:58:45,847 WARN L363 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-18 02:58:45,849 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-09-18 02:58:45,859 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,859 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,859 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,860 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,860 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,861 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,862 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,863 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,863 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,864 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,864 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,864 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,864 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,864 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,865 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,865 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,865 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,865 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,865 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,866 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,866 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,866 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,866 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,866 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,867 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,867 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,874 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,875 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,875 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,875 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,875 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,878 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,878 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,878 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,879 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,879 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:45,884 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-18 02:58:45,885 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-18 02:58:45,885 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-18 02:58:45,885 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-18 02:58:45,885 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-18 02:58:45,885 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-18 02:58:45,885 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-18 02:58:45,885 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-18 02:58:45,886 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-18 02:58:45,887 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 85 transitions, 200 flow [2020-09-18 02:58:45,888 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 200 flow [2020-09-18 02:58:45,968 INFO L129 PetriNetUnfolder]: 45/330 cut-off events. [2020-09-18 02:58:45,969 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-09-18 02:58:45,971 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. [2020-09-18 02:58:45,977 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 200 flow [2020-09-18 02:58:46,026 INFO L129 PetriNetUnfolder]: 45/330 cut-off events. [2020-09-18 02:58:46,026 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-09-18 02:58:46,030 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. [2020-09-18 02:58:46,036 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1470 [2020-09-18 02:58:46,037 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-18 02:58:47,506 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-18 02:58:47,620 INFO L206 etLargeBlockEncoding]: Checked pairs total: 3028 [2020-09-18 02:58:47,620 INFO L214 etLargeBlockEncoding]: Total number of compositions: 68 [2020-09-18 02:58:47,621 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 28 transitions, 86 flow [2020-09-18 02:58:47,676 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1150 states. [2020-09-18 02:58:47,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states. [2020-09-18 02:58:47,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-09-18 02:58:47,677 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:47,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-09-18 02:58:47,678 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:47,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:47,678 INFO L82 PathProgramCache]: Analyzing trace with hash 18528206, now seen corresponding path program 1 times [2020-09-18 02:58:47,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:47,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730065408] [2020-09-18 02:58:47,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:47,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730065408] [2020-09-18 02:58:47,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-18 02:58:47,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-18 02:58:47,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1678781568] [2020-09-18 02:58:47,719 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:58:47,719 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:58:47,720 INFO L274 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-09-18 02:58:47,720 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:58:47,721 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:58:47,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-18 02:58:47,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:58:47,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-18 02:58:47,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-18 02:58:47,722 INFO L87 Difference]: Start difference. First operand 1150 states. Second operand 3 states. [2020-09-18 02:58:47,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:58:47,759 INFO L93 Difference]: Finished difference Result 1150 states and 3360 transitions. [2020-09-18 02:58:47,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-18 02:58:47,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-09-18 02:58:47,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:58:47,772 INFO L225 Difference]: With dead ends: 1150 [2020-09-18 02:58:47,772 INFO L226 Difference]: Without dead ends: 1024 [2020-09-18 02:58:47,773 INFO L675 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 [2020-09-18 02:58:47,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2020-09-18 02:58:47,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1024. [2020-09-18 02:58:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-09-18 02:58:47,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3009 transitions. [2020-09-18 02:58:47,844 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3009 transitions. Word has length 4 [2020-09-18 02:58:47,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:58:47,845 INFO L479 AbstractCegarLoop]: Abstraction has 1024 states and 3009 transitions. [2020-09-18 02:58:47,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-18 02:58:47,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3009 transitions. [2020-09-18 02:58:47,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-18 02:58:47,846 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:47,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:58:47,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-18 02:58:47,846 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:47,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:47,846 INFO L82 PathProgramCache]: Analyzing trace with hash 949696130, now seen corresponding path program 1 times [2020-09-18 02:58:47,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:47,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793090171] [2020-09-18 02:58:47,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:47,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:47,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793090171] [2020-09-18 02:58:47,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688743707] [2020-09-18 02:58:47,896 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 [2020-09-18 02:58:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:47,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-18 02:58:47,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:58:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:47,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:58:47,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-09-18 02:58:47,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [513336070] [2020-09-18 02:58:47,994 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:58:47,995 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:58:47,996 INFO L274 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-09-18 02:58:47,996 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:58:47,996 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:58:47,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-18 02:58:47,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:58:47,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-18 02:58:47,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-18 02:58:47,998 INFO L87 Difference]: Start difference. First operand 1024 states and 3009 transitions. Second operand 6 states. [2020-09-18 02:58:48,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:58:48,054 INFO L93 Difference]: Finished difference Result 1024 states and 3005 transitions. [2020-09-18 02:58:48,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-18 02:58:48,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-09-18 02:58:48,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:58:48,066 INFO L225 Difference]: With dead ends: 1024 [2020-09-18 02:58:48,066 INFO L226 Difference]: Without dead ends: 1024 [2020-09-18 02:58:48,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-18 02:58:48,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2020-09-18 02:58:48,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1024. [2020-09-18 02:58:48,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2020-09-18 02:58:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3005 transitions. [2020-09-18 02:58:48,104 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3005 transitions. Word has length 8 [2020-09-18 02:58:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:58:48,104 INFO L479 AbstractCegarLoop]: Abstraction has 1024 states and 3005 transitions. [2020-09-18 02:58:48,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-18 02:58:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3005 transitions. [2020-09-18 02:58:48,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-18 02:58:48,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:48,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-09-18 02:58:48,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:58:48,322 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:48,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1421208619, now seen corresponding path program 1 times [2020-09-18 02:58:48,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:48,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843134977] [2020-09-18 02:58:48,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-18 02:58:48,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843134977] [2020-09-18 02:58:48,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-18 02:58:48,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-18 02:58:48,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [115831718] [2020-09-18 02:58:48,424 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:58:48,426 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:58:48,427 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 12 transitions. [2020-09-18 02:58:48,428 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:58:48,428 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:58:48,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-18 02:58:48,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:58:48,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-18 02:58:48,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-18 02:58:48,429 INFO L87 Difference]: Start difference. First operand 1024 states and 3005 transitions. Second operand 4 states. [2020-09-18 02:58:48,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:58:48,477 INFO L93 Difference]: Finished difference Result 1005 states and 2767 transitions. [2020-09-18 02:58:48,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-18 02:58:48,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-09-18 02:58:48,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:58:48,486 INFO L225 Difference]: With dead ends: 1005 [2020-09-18 02:58:48,486 INFO L226 Difference]: Without dead ends: 1005 [2020-09-18 02:58:48,487 INFO L675 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 [2020-09-18 02:58:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2020-09-18 02:58:48,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 973. [2020-09-18 02:58:48,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 973 states. [2020-09-18 02:58:48,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 2707 transitions. [2020-09-18 02:58:48,523 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 2707 transitions. Word has length 12 [2020-09-18 02:58:48,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:58:48,525 INFO L479 AbstractCegarLoop]: Abstraction has 973 states and 2707 transitions. [2020-09-18 02:58:48,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-18 02:58:48,525 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 2707 transitions. [2020-09-18 02:58:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-18 02:58:48,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:48,528 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2020-09-18 02:58:48,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-18 02:58:48,528 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:48,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:48,529 INFO L82 PathProgramCache]: Analyzing trace with hash -515475845, now seen corresponding path program 1 times [2020-09-18 02:58:48,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:48,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394621986] [2020-09-18 02:58:48,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-18 02:58:48,563 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-18 02:58:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-18 02:58:48,578 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-18 02:58:48,588 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-18 02:58:48,589 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-18 02:58:48,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-18 02:58:48,589 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-18 02:58:48,590 WARN L363 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-18 02:58:48,590 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-09-18 02:58:48,598 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,598 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,599 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,599 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,599 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,599 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,599 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,600 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,600 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,600 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,600 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,600 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,601 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,601 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,601 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,601 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,601 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,602 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,602 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,602 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,602 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,603 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,603 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,603 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,603 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,603 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,603 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,604 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,604 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,604 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,605 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,605 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,605 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,607 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,607 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,607 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,607 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,608 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,609 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,609 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,610 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,610 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,610 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,611 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,612 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,612 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,612 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,612 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:48,617 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-18 02:58:48,617 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-18 02:58:48,617 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-18 02:58:48,618 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-18 02:58:48,618 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-18 02:58:48,618 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-18 02:58:48,618 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-18 02:58:48,618 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-18 02:58:48,618 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-18 02:58:48,620 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 92 transitions, 228 flow [2020-09-18 02:58:48,620 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 228 flow [2020-09-18 02:58:48,696 INFO L129 PetriNetUnfolder]: 91/613 cut-off events. [2020-09-18 02:58:48,696 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-09-18 02:58:48,699 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. [2020-09-18 02:58:48,713 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 228 flow [2020-09-18 02:58:48,815 INFO L129 PetriNetUnfolder]: 91/613 cut-off events. [2020-09-18 02:58:48,816 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-09-18 02:58:48,817 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. [2020-09-18 02:58:48,828 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2120 [2020-09-18 02:58:48,829 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-18 02:58:50,317 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-18 02:58:50,439 INFO L206 etLargeBlockEncoding]: Checked pairs total: 4448 [2020-09-18 02:58:50,439 INFO L214 etLargeBlockEncoding]: Total number of compositions: 68 [2020-09-18 02:58:50,439 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 37 places, 33 transitions, 110 flow [2020-09-18 02:58:50,786 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 5482 states. [2020-09-18 02:58:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 5482 states. [2020-09-18 02:58:50,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-09-18 02:58:50,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:50,787 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-09-18 02:58:50,787 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:50,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:50,788 INFO L82 PathProgramCache]: Analyzing trace with hash 23824947, now seen corresponding path program 1 times [2020-09-18 02:58:50,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:50,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592302179] [2020-09-18 02:58:50,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:50,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592302179] [2020-09-18 02:58:50,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-18 02:58:50,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-18 02:58:50,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1045732925] [2020-09-18 02:58:50,823 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:58:50,823 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:58:50,824 INFO L274 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-09-18 02:58:50,824 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:58:50,825 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:58:50,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-18 02:58:50,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:58:50,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-18 02:58:50,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-18 02:58:50,826 INFO L87 Difference]: Start difference. First operand 5482 states. Second operand 3 states. [2020-09-18 02:58:50,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:58:50,896 INFO L93 Difference]: Finished difference Result 5482 states and 19554 transitions. [2020-09-18 02:58:50,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-18 02:58:50,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-09-18 02:58:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:58:50,943 INFO L225 Difference]: With dead ends: 5482 [2020-09-18 02:58:50,944 INFO L226 Difference]: Without dead ends: 4856 [2020-09-18 02:58:50,944 INFO L675 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 [2020-09-18 02:58:50,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2020-09-18 02:58:51,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2020-09-18 02:58:51,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4856 states. [2020-09-18 02:58:51,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 17428 transitions. [2020-09-18 02:58:51,150 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 17428 transitions. Word has length 4 [2020-09-18 02:58:51,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:58:51,150 INFO L479 AbstractCegarLoop]: Abstraction has 4856 states and 17428 transitions. [2020-09-18 02:58:51,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-18 02:58:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 17428 transitions. [2020-09-18 02:58:51,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-18 02:58:51,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:51,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:58:51,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-18 02:58:51,152 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:51,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:51,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1205655351, now seen corresponding path program 1 times [2020-09-18 02:58:51,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:51,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795723936] [2020-09-18 02:58:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:51,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:51,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795723936] [2020-09-18 02:58:51,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056313016] [2020-09-18 02:58:51,198 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 [2020-09-18 02:58:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:51,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-18 02:58:51,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:58:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:51,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:58:51,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-09-18 02:58:51,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [383745481] [2020-09-18 02:58:51,311 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:58:51,315 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:58:51,380 INFO L274 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-09-18 02:58:51,380 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:58:51,380 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:58:51,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-18 02:58:51,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:58:51,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-18 02:58:51,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-18 02:58:51,382 INFO L87 Difference]: Start difference. First operand 4856 states and 17428 transitions. Second operand 6 states. [2020-09-18 02:58:51,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:58:51,466 INFO L93 Difference]: Finished difference Result 4856 states and 17424 transitions. [2020-09-18 02:58:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-18 02:58:51,467 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-09-18 02:58:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:58:51,513 INFO L225 Difference]: With dead ends: 4856 [2020-09-18 02:58:51,513 INFO L226 Difference]: Without dead ends: 4856 [2020-09-18 02:58:51,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-18 02:58:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2020-09-18 02:58:51,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4856. [2020-09-18 02:58:51,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4856 states. [2020-09-18 02:58:51,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4856 states to 4856 states and 17424 transitions. [2020-09-18 02:58:51,696 INFO L78 Accepts]: Start accepts. Automaton has 4856 states and 17424 transitions. Word has length 8 [2020-09-18 02:58:51,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:58:51,697 INFO L479 AbstractCegarLoop]: Abstraction has 4856 states and 17424 transitions. [2020-09-18 02:58:51,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-18 02:58:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 4856 states and 17424 transitions. [2020-09-18 02:58:51,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-18 02:58:51,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:51,698 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-09-18 02:58:51,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-09-18 02:58:51,913 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:51,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:51,914 INFO L82 PathProgramCache]: Analyzing trace with hash -137206530, now seen corresponding path program 1 times [2020-09-18 02:58:51,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:51,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834263363] [2020-09-18 02:58:51,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-18 02:58:51,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834263363] [2020-09-18 02:58:51,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-18 02:58:51,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-18 02:58:51,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1351852203] [2020-09-18 02:58:51,961 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:58:51,963 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:58:51,964 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 12 transitions. [2020-09-18 02:58:51,964 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:58:51,964 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:58:51,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-18 02:58:51,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:58:51,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-18 02:58:51,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-18 02:58:51,966 INFO L87 Difference]: Start difference. First operand 4856 states and 17424 transitions. Second operand 4 states. [2020-09-18 02:58:52,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:58:52,034 INFO L93 Difference]: Finished difference Result 4985 states and 16961 transitions. [2020-09-18 02:58:52,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-18 02:58:52,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-09-18 02:58:52,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:58:52,088 INFO L225 Difference]: With dead ends: 4985 [2020-09-18 02:58:52,088 INFO L226 Difference]: Without dead ends: 4985 [2020-09-18 02:58:52,088 INFO L675 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 [2020-09-18 02:58:52,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4985 states. [2020-09-18 02:58:52,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4985 to 4793. [2020-09-18 02:58:52,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4793 states. [2020-09-18 02:58:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4793 states to 4793 states and 16469 transitions. [2020-09-18 02:58:52,262 INFO L78 Accepts]: Start accepts. Automaton has 4793 states and 16469 transitions. Word has length 12 [2020-09-18 02:58:52,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:58:52,262 INFO L479 AbstractCegarLoop]: Abstraction has 4793 states and 16469 transitions. [2020-09-18 02:58:52,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-18 02:58:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 4793 states and 16469 transitions. [2020-09-18 02:58:52,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-18 02:58:52,266 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:52,266 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-09-18 02:58:52,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-18 02:58:52,266 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:52,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:52,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1534304145, now seen corresponding path program 1 times [2020-09-18 02:58:52,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:52,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567339387] [2020-09-18 02:58:52,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-18 02:58:52,294 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-18 02:58:52,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-18 02:58:52,317 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-18 02:58:52,337 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-18 02:58:52,339 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-18 02:58:52,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-18 02:58:52,340 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-18 02:58:52,340 WARN L363 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-18 02:58:52,341 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-09-18 02:58:52,351 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,351 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,351 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,351 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,351 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,352 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,352 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,352 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,352 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,352 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,352 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,353 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,353 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,353 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,353 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,353 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,354 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,354 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,354 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,354 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,354 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,355 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,355 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,356 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,356 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,356 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,356 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,356 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,356 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,357 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,357 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,357 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,357 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,357 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,357 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,358 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,358 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,358 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,359 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,359 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,364 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,365 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,365 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,365 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,365 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,367 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,367 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,367 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,368 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,368 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,369 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,369 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,369 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,370 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,370 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,371 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,371 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,371 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,371 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,372 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:58:52,376 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-18 02:58:52,376 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-18 02:58:52,376 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-18 02:58:52,376 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-18 02:58:52,376 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-18 02:58:52,377 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-18 02:58:52,377 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-18 02:58:52,377 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-18 02:58:52,377 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-18 02:58:52,378 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 99 transitions, 258 flow [2020-09-18 02:58:52,378 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 258 flow [2020-09-18 02:58:52,544 INFO L129 PetriNetUnfolder]: 189/1172 cut-off events. [2020-09-18 02:58:52,544 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-09-18 02:58:52,548 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. [2020-09-18 02:58:52,576 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 258 flow [2020-09-18 02:58:52,709 INFO L129 PetriNetUnfolder]: 189/1172 cut-off events. [2020-09-18 02:58:52,709 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-09-18 02:58:52,713 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. [2020-09-18 02:58:52,729 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 2850 [2020-09-18 02:58:52,729 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-18 02:58:53,980 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-09-18 02:58:54,451 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-09-18 02:58:54,525 INFO L206 etLargeBlockEncoding]: Checked pairs total: 5971 [2020-09-18 02:58:54,526 INFO L214 etLargeBlockEncoding]: Total number of compositions: 70 [2020-09-18 02:58:54,526 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 38 transitions, 136 flow [2020-09-18 02:58:56,821 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 26310 states. [2020-09-18 02:58:56,821 INFO L276 IsEmpty]: Start isEmpty. Operand 26310 states. [2020-09-18 02:58:56,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-09-18 02:58:56,822 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:56,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-09-18 02:58:56,822 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:56,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:56,822 INFO L82 PathProgramCache]: Analyzing trace with hash 29336307, now seen corresponding path program 1 times [2020-09-18 02:58:56,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:56,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989605037] [2020-09-18 02:58:56,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:56,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:56,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989605037] [2020-09-18 02:58:56,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-18 02:58:56,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-18 02:58:56,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [741220415] [2020-09-18 02:58:56,848 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:58:56,849 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:58:56,849 INFO L274 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-09-18 02:58:56,849 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:58:56,849 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:58:56,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-18 02:58:56,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:58:56,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-18 02:58:56,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-18 02:58:56,851 INFO L87 Difference]: Start difference. First operand 26310 states. Second operand 3 states. [2020-09-18 02:58:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:58:57,926 INFO L93 Difference]: Finished difference Result 26310 states and 110676 transitions. [2020-09-18 02:58:57,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-18 02:58:57,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-09-18 02:58:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:58:58,087 INFO L225 Difference]: With dead ends: 26310 [2020-09-18 02:58:58,088 INFO L226 Difference]: Without dead ends: 23184 [2020-09-18 02:58:58,088 INFO L675 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 [2020-09-18 02:58:58,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23184 states. [2020-09-18 02:58:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23184 to 23184. [2020-09-18 02:58:59,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23184 states. [2020-09-18 02:58:59,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23184 states to 23184 states and 98175 transitions. [2020-09-18 02:58:59,151 INFO L78 Accepts]: Start accepts. Automaton has 23184 states and 98175 transitions. Word has length 4 [2020-09-18 02:58:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:58:59,151 INFO L479 AbstractCegarLoop]: Abstraction has 23184 states and 98175 transitions. [2020-09-18 02:58:59,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-18 02:58:59,152 INFO L276 IsEmpty]: Start isEmpty. Operand 23184 states and 98175 transitions. [2020-09-18 02:58:59,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-18 02:58:59,152 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:58:59,152 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:58:59,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-18 02:58:59,153 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:58:59,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:58:59,153 INFO L82 PathProgramCache]: Analyzing trace with hash 805936127, now seen corresponding path program 1 times [2020-09-18 02:58:59,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:58:59,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381045410] [2020-09-18 02:58:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:58:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:59,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381045410] [2020-09-18 02:58:59,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106056092] [2020-09-18 02:58:59,196 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 [2020-09-18 02:58:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:58:59,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-18 02:58:59,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:58:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:58:59,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:58:59,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-09-18 02:58:59,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1975877575] [2020-09-18 02:58:59,290 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:58:59,291 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:58:59,292 INFO L274 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-09-18 02:58:59,292 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:58:59,292 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:58:59,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-18 02:58:59,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:58:59,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-18 02:58:59,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-18 02:58:59,294 INFO L87 Difference]: Start difference. First operand 23184 states and 98175 transitions. Second operand 6 states. [2020-09-18 02:58:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:58:59,517 INFO L93 Difference]: Finished difference Result 23184 states and 98171 transitions. [2020-09-18 02:58:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-18 02:58:59,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-09-18 02:58:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:58:59,649 INFO L225 Difference]: With dead ends: 23184 [2020-09-18 02:58:59,649 INFO L226 Difference]: Without dead ends: 23184 [2020-09-18 02:58:59,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-18 02:58:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23184 states. [2020-09-18 02:59:01,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23184 to 23184. [2020-09-18 02:59:01,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23184 states. [2020-09-18 02:59:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23184 states to 23184 states and 98171 transitions. [2020-09-18 02:59:02,106 INFO L78 Accepts]: Start accepts. Automaton has 23184 states and 98171 transitions. Word has length 8 [2020-09-18 02:59:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:59:02,106 INFO L479 AbstractCegarLoop]: Abstraction has 23184 states and 98171 transitions. [2020-09-18 02:59:02,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-18 02:59:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 23184 states and 98171 transitions. [2020-09-18 02:59:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-18 02:59:02,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:59:02,108 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-09-18 02:59:02,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:59:02,315 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:59:02,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:59:02,316 INFO L82 PathProgramCache]: Analyzing trace with hash -921892950, now seen corresponding path program 1 times [2020-09-18 02:59:02,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:59:02,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001460730] [2020-09-18 02:59:02,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:59:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:59:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-18 02:59:02,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001460730] [2020-09-18 02:59:02,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-18 02:59:02,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-18 02:59:02,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1413172775] [2020-09-18 02:59:02,365 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:59:02,366 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:59:02,367 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 12 transitions. [2020-09-18 02:59:02,367 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:59:02,367 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:59:02,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-18 02:59:02,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:59:02,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-18 02:59:02,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-18 02:59:02,368 INFO L87 Difference]: Start difference. First operand 23184 states and 98171 transitions. Second operand 4 states. [2020-09-18 02:59:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:59:02,538 INFO L93 Difference]: Finished difference Result 24533 states and 99507 transitions. [2020-09-18 02:59:02,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-18 02:59:02,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-09-18 02:59:02,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:59:02,669 INFO L225 Difference]: With dead ends: 24533 [2020-09-18 02:59:02,669 INFO L226 Difference]: Without dead ends: 24533 [2020-09-18 02:59:02,669 INFO L675 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 [2020-09-18 02:59:02,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24533 states. [2020-09-18 02:59:03,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24533 to 23573. [2020-09-18 02:59:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23573 states. [2020-09-18 02:59:03,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23573 states to 23573 states and 96327 transitions. [2020-09-18 02:59:03,770 INFO L78 Accepts]: Start accepts. Automaton has 23573 states and 96327 transitions. Word has length 12 [2020-09-18 02:59:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:59:03,770 INFO L479 AbstractCegarLoop]: Abstraction has 23573 states and 96327 transitions. [2020-09-18 02:59:03,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-18 02:59:03,770 INFO L276 IsEmpty]: Start isEmpty. Operand 23573 states and 96327 transitions. [2020-09-18 02:59:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-18 02:59:03,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:59:03,773 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:59:03,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-18 02:59:03,773 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:59:03,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:59:03,773 INFO L82 PathProgramCache]: Analyzing trace with hash 81754288, now seen corresponding path program 1 times [2020-09-18 02:59:03,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:59:03,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701840439] [2020-09-18 02:59:03,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:59:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:59:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-18 02:59:03,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701840439] [2020-09-18 02:59:03,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654146616] [2020-09-18 02:59:03,840 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 [2020-09-18 02:59:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:59:03,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-18 02:59:03,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:59:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-18 02:59:03,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:59:03,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-18 02:59:03,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1999602397] [2020-09-18 02:59:03,965 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:59:03,968 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:59:03,973 INFO L274 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2020-09-18 02:59:03,973 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:59:04,049 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:59:04,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-18 02:59:04,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:59:04,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-18 02:59:04,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-09-18 02:59:04,050 INFO L87 Difference]: Start difference. First operand 23573 states and 96327 transitions. Second operand 8 states. [2020-09-18 02:59:04,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:59:04,317 INFO L93 Difference]: Finished difference Result 23557 states and 96271 transitions. [2020-09-18 02:59:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-18 02:59:04,318 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-09-18 02:59:04,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:59:04,416 INFO L225 Difference]: With dead ends: 23557 [2020-09-18 02:59:04,416 INFO L226 Difference]: Without dead ends: 23557 [2020-09-18 02:59:04,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-09-18 02:59:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23557 states. [2020-09-18 02:59:06,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23557 to 23557. [2020-09-18 02:59:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23557 states. [2020-09-18 02:59:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23557 states to 23557 states and 96271 transitions. [2020-09-18 02:59:06,419 INFO L78 Accepts]: Start accepts. Automaton has 23557 states and 96271 transitions. Word has length 20 [2020-09-18 02:59:06,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:59:06,419 INFO L479 AbstractCegarLoop]: Abstraction has 23557 states and 96271 transitions. [2020-09-18 02:59:06,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-18 02:59:06,419 INFO L276 IsEmpty]: Start isEmpty. Operand 23557 states and 96271 transitions. [2020-09-18 02:59:06,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-18 02:59:06,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:59:06,428 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:59:06,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-18 02:59:06,638 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:59:06,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:59:06,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1012463302, now seen corresponding path program 1 times [2020-09-18 02:59:06,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:59:06,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729682814] [2020-09-18 02:59:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:59:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-18 02:59:06,670 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-18 02:59:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-18 02:59:06,691 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-18 02:59:06,705 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-18 02:59:06,706 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-18 02:59:06,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-18 02:59:06,706 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-18 02:59:06,708 WARN L363 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-18 02:59:06,708 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-09-18 02:59:06,723 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,724 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,724 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,724 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,724 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,725 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,725 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,725 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,725 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,725 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,725 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,726 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,726 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,726 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,726 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,726 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,726 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,727 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,727 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,727 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,727 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,727 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,728 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,728 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,728 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,728 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,728 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,728 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,729 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,729 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,729 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,729 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,729 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,730 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,730 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,731 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,731 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,731 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,731 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,731 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,732 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,732 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,732 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,733 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,733 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,733 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,733 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,736 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,736 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,737 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,737 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,737 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,738 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,738 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,739 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,739 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,739 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,740 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,741 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,741 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,741 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,741 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,744 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,744 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,744 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,744 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,744 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,747 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,747 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,747 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,747 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,747 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 02:59:06,754 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-18 02:59:06,755 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-18 02:59:06,755 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-18 02:59:06,755 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-18 02:59:06,755 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-18 02:59:06,755 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-18 02:59:06,755 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-18 02:59:06,755 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-18 02:59:06,756 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-18 02:59:06,759 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 106 transitions, 290 flow [2020-09-18 02:59:06,759 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 106 transitions, 290 flow [2020-09-18 02:59:07,088 INFO L129 PetriNetUnfolder]: 399/2291 cut-off events. [2020-09-18 02:59:07,088 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-09-18 02:59:07,101 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. [2020-09-18 02:59:07,143 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 106 transitions, 290 flow [2020-09-18 02:59:07,626 INFO L129 PetriNetUnfolder]: 399/2291 cut-off events. [2020-09-18 02:59:07,627 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-09-18 02:59:07,635 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. [2020-09-18 02:59:07,671 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 3660 [2020-09-18 02:59:07,672 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-18 02:59:08,748 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-09-18 02:59:09,207 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-18 02:59:09,314 INFO L206 etLargeBlockEncoding]: Checked pairs total: 8653 [2020-09-18 02:59:09,314 INFO L214 etLargeBlockEncoding]: Total number of compositions: 71 [2020-09-18 02:59:09,315 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 43 transitions, 164 flow [2020-09-18 02:59:46,080 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 127122 states. [2020-09-18 02:59:46,080 INFO L276 IsEmpty]: Start isEmpty. Operand 127122 states. [2020-09-18 02:59:46,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-09-18 02:59:46,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:59:46,081 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-09-18 02:59:46,081 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:59:46,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:59:46,082 INFO L82 PathProgramCache]: Analyzing trace with hash 35155697, now seen corresponding path program 1 times [2020-09-18 02:59:46,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:59:46,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678203559] [2020-09-18 02:59:46,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:59:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:59:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:59:46,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678203559] [2020-09-18 02:59:46,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-18 02:59:46,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-18 02:59:46,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [250498797] [2020-09-18 02:59:46,115 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:59:46,115 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:59:46,116 INFO L274 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2020-09-18 02:59:46,116 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:59:46,116 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:59:46,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-18 02:59:46,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:59:46,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-18 02:59:46,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-18 02:59:46,117 INFO L87 Difference]: Start difference. First operand 127122 states. Second operand 3 states. [2020-09-18 02:59:47,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 02:59:47,878 INFO L93 Difference]: Finished difference Result 127122 states and 615398 transitions. [2020-09-18 02:59:47,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-18 02:59:47,878 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-09-18 02:59:47,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 02:59:48,368 INFO L225 Difference]: With dead ends: 127122 [2020-09-18 02:59:48,368 INFO L226 Difference]: Without dead ends: 111496 [2020-09-18 02:59:48,368 INFO L675 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 [2020-09-18 02:59:51,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111496 states. [2020-09-18 02:59:59,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111496 to 111496. [2020-09-18 02:59:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111496 states. [2020-09-18 02:59:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111496 states to 111496 states and 543522 transitions. [2020-09-18 02:59:59,635 INFO L78 Accepts]: Start accepts. Automaton has 111496 states and 543522 transitions. Word has length 4 [2020-09-18 02:59:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 02:59:59,636 INFO L479 AbstractCegarLoop]: Abstraction has 111496 states and 543522 transitions. [2020-09-18 02:59:59,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-18 02:59:59,636 INFO L276 IsEmpty]: Start isEmpty. Operand 111496 states and 543522 transitions. [2020-09-18 02:59:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-18 02:59:59,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 02:59:59,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 02:59:59,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-18 02:59:59,636 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 02:59:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 02:59:59,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1170285684, now seen corresponding path program 1 times [2020-09-18 02:59:59,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 02:59:59,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204825843] [2020-09-18 02:59:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 02:59:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:59:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:59:59,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204825843] [2020-09-18 02:59:59,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762673213] [2020-09-18 02:59:59,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 02:59:59,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 02:59:59,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-18 02:59:59,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 02:59:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-18 02:59:59,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 02:59:59,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-09-18 02:59:59,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1973017192] [2020-09-18 02:59:59,776 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 02:59:59,777 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 02:59:59,778 INFO L274 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-09-18 02:59:59,778 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 02:59:59,778 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 02:59:59,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-18 02:59:59,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 02:59:59,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-18 02:59:59,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-18 02:59:59,779 INFO L87 Difference]: Start difference. First operand 111496 states and 543522 transitions. Second operand 6 states. [2020-09-18 03:00:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 03:00:01,953 INFO L93 Difference]: Finished difference Result 111496 states and 543518 transitions. [2020-09-18 03:00:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-18 03:00:01,954 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-09-18 03:00:01,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 03:00:02,460 INFO L225 Difference]: With dead ends: 111496 [2020-09-18 03:00:02,460 INFO L226 Difference]: Without dead ends: 111496 [2020-09-18 03:00:02,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-09-18 03:00:12,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111496 states. [2020-09-18 03:00:14,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111496 to 111496. [2020-09-18 03:00:14,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111496 states. [2020-09-18 03:00:23,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111496 states to 111496 states and 543518 transitions. [2020-09-18 03:00:23,111 INFO L78 Accepts]: Start accepts. Automaton has 111496 states and 543518 transitions. Word has length 8 [2020-09-18 03:00:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 03:00:23,111 INFO L479 AbstractCegarLoop]: Abstraction has 111496 states and 543518 transitions. [2020-09-18 03:00:23,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-18 03:00:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 111496 states and 543518 transitions. [2020-09-18 03:00:23,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-18 03:00:23,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 03:00:23,112 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-09-18 03:00:23,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 03:00:23,322 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 03:00:23,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 03:00:23,323 INFO L82 PathProgramCache]: Analyzing trace with hash -343123130, now seen corresponding path program 1 times [2020-09-18 03:00:23,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 03:00:23,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788722048] [2020-09-18 03:00:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 03:00:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 03:00:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-09-18 03:00:23,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788722048] [2020-09-18 03:00:23,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-18 03:00:23,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-18 03:00:23,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1469482570] [2020-09-18 03:00:23,371 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 03:00:23,372 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 03:00:23,373 INFO L274 McrAutomatonBuilder]: Finished intersection with 13 states and 12 transitions. [2020-09-18 03:00:23,373 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 03:00:23,373 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 03:00:23,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-18 03:00:23,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 03:00:23,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-18 03:00:23,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-18 03:00:23,375 INFO L87 Difference]: Start difference. First operand 111496 states and 543518 transitions. Second operand 4 states. [2020-09-18 03:00:24,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 03:00:24,266 INFO L93 Difference]: Finished difference Result 120737 states and 568389 transitions. [2020-09-18 03:00:24,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-18 03:00:24,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-09-18 03:00:24,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 03:00:24,747 INFO L225 Difference]: With dead ends: 120737 [2020-09-18 03:00:24,748 INFO L226 Difference]: Without dead ends: 120737 [2020-09-18 03:00:24,748 INFO L675 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 [2020-09-18 03:00:33,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120737 states. [2020-09-18 03:00:35,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120737 to 116193. [2020-09-18 03:00:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116193 states. [2020-09-18 03:00:36,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116193 states to 116193 states and 549849 transitions. [2020-09-18 03:00:36,499 INFO L78 Accepts]: Start accepts. Automaton has 116193 states and 549849 transitions. Word has length 12 [2020-09-18 03:00:36,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 03:00:36,499 INFO L479 AbstractCegarLoop]: Abstraction has 116193 states and 549849 transitions. [2020-09-18 03:00:36,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-18 03:00:36,499 INFO L276 IsEmpty]: Start isEmpty. Operand 116193 states and 549849 transitions. [2020-09-18 03:00:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-18 03:00:36,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 03:00:36,502 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 03:00:36,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-18 03:00:36,502 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 03:00:36,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 03:00:36,502 INFO L82 PathProgramCache]: Analyzing trace with hash 173719339, now seen corresponding path program 1 times [2020-09-18 03:00:36,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 03:00:36,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499096197] [2020-09-18 03:00:36,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 03:00:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 03:00:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-18 03:00:36,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499096197] [2020-09-18 03:00:36,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253526505] [2020-09-18 03:00:36,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 03:00:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 03:00:36,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-09-18 03:00:36,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 03:00:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-18 03:00:36,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 03:00:36,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-09-18 03:00:36,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1563625148] [2020-09-18 03:00:36,713 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 03:00:36,716 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 03:00:36,720 INFO L274 McrAutomatonBuilder]: Finished intersection with 33 states and 44 transitions. [2020-09-18 03:00:36,721 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 03:00:36,806 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 03:00:36,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-18 03:00:36,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 03:00:36,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-18 03:00:36,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-09-18 03:00:36,807 INFO L87 Difference]: Start difference. First operand 116193 states and 549849 transitions. Second operand 8 states. [2020-09-18 03:00:37,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 03:00:37,571 INFO L93 Difference]: Finished difference Result 116177 states and 549793 transitions. [2020-09-18 03:00:37,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-18 03:00:37,572 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-09-18 03:00:37,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 03:00:43,625 INFO L225 Difference]: With dead ends: 116177 [2020-09-18 03:00:43,625 INFO L226 Difference]: Without dead ends: 116177 [2020-09-18 03:00:43,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-09-18 03:00:45,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116177 states. [2020-09-18 03:00:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116177 to 116177. [2020-09-18 03:00:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116177 states. [2020-09-18 03:00:48,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116177 states to 116177 states and 549793 transitions. [2020-09-18 03:00:48,946 INFO L78 Accepts]: Start accepts. Automaton has 116177 states and 549793 transitions. Word has length 20 [2020-09-18 03:00:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 03:00:48,946 INFO L479 AbstractCegarLoop]: Abstraction has 116177 states and 549793 transitions. [2020-09-18 03:00:48,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-18 03:00:48,947 INFO L276 IsEmpty]: Start isEmpty. Operand 116177 states and 549793 transitions. [2020-09-18 03:00:48,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-18 03:00:48,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 03:00:48,955 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 03:00:49,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 03:00:49,170 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 03:00:49,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 03:00:49,171 INFO L82 PathProgramCache]: Analyzing trace with hash -999416206, now seen corresponding path program 1 times [2020-09-18 03:00:49,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 03:00:49,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59360005] [2020-09-18 03:00:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 03:00:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 03:00:49,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-09-18 03:00:49,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59360005] [2020-09-18 03:00:49,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143047474] [2020-09-18 03:00:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-18 03:00:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-18 03:00:49,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-09-18 03:00:49,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-18 03:00:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-18 03:00:49,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-18 03:00:49,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5] total 8 [2020-09-18 03:00:49,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1928507835] [2020-09-18 03:00:49,417 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-18 03:00:49,421 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-18 03:00:49,428 INFO L274 McrAutomatonBuilder]: Finished intersection with 41 states and 56 transitions. [2020-09-18 03:00:49,428 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-18 03:00:49,505 INFO L409 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-18 03:00:49,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-18 03:00:49,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-18 03:00:49,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-18 03:00:49,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2020-09-18 03:00:49,506 INFO L87 Difference]: Start difference. First operand 116177 states and 549793 transitions. Second operand 9 states. [2020-09-18 03:00:51,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-18 03:00:51,316 INFO L93 Difference]: Finished difference Result 94230 states and 434726 transitions. [2020-09-18 03:00:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-18 03:00:51,317 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-09-18 03:00:51,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-18 03:00:51,674 INFO L225 Difference]: With dead ends: 94230 [2020-09-18 03:00:51,674 INFO L226 Difference]: Without dead ends: 94230 [2020-09-18 03:00:51,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=38, Unknown=0, NotChecked=0, Total=72 [2020-09-18 03:00:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94230 states. [2020-09-18 03:01:00,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94230 to 94012. [2020-09-18 03:01:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94012 states. [2020-09-18 03:01:01,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94012 states to 94012 states and 434318 transitions. [2020-09-18 03:01:01,219 INFO L78 Accepts]: Start accepts. Automaton has 94012 states and 434318 transitions. Word has length 24 [2020-09-18 03:01:01,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-18 03:01:01,219 INFO L479 AbstractCegarLoop]: Abstraction has 94012 states and 434318 transitions. [2020-09-18 03:01:01,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-18 03:01:01,219 INFO L276 IsEmpty]: Start isEmpty. Operand 94012 states and 434318 transitions. [2020-09-18 03:01:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-18 03:01:01,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-18 03:01:01,242 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-18 03:01:01,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-18 03:01:01,456 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-18 03:01:01,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-18 03:01:01,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1963695170, now seen corresponding path program 1 times [2020-09-18 03:01:01,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-18 03:01:01,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899035905] [2020-09-18 03:01:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-18 03:01:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-18 03:01:01,492 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-18 03:01:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-18 03:01:01,509 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-18 03:01:01,527 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-18 03:01:01,527 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-18 03:01:01,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-18 03:01:01,528 WARN L633 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-09-18 03:01:01,530 WARN L363 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-09-18 03:01:01,530 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-09-18 03:01:01,541 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,541 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,542 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,542 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,542 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,542 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,542 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,543 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,543 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,543 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,543 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,543 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,543 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,544 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,544 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,544 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,544 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,544 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,545 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,545 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,545 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,545 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,545 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,546 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,546 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,546 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,546 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,546 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,546 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,547 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,547 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,547 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,547 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,547 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,547 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,548 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,548 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,548 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,548 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,548 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,548 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,549 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,549 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,549 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,549 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,549 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,550 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,550 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,550 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,551 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,551 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,551 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,551 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,551 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,553 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,553 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,553 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,554 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,554 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,562 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,564 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,564 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,564 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,564 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,572 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,573 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,573 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,574 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,574 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,579 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,580 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,580 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,580 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,580 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,583 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,584 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,584 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,584 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,584 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,589 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,590 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,590 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,590 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,590 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-18 03:01:01,600 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-18 03:01:01,601 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-18 03:01:01,601 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-18 03:01:01,601 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-18 03:01:01,601 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-18 03:01:01,601 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-18 03:01:01,602 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-18 03:01:01,602 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-18 03:01:01,602 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-18 03:01:01,604 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 113 transitions, 324 flow [2020-09-18 03:01:01,604 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 115 places, 113 transitions, 324 flow [2020-09-18 03:01:02,254 INFO L129 PetriNetUnfolder]: 849/4546 cut-off events. [2020-09-18 03:01:02,255 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-09-18 03:01:02,284 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. [2020-09-18 03:01:02,377 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 115 places, 113 transitions, 324 flow [2020-09-18 03:01:02,872 INFO L129 PetriNetUnfolder]: 849/4546 cut-off events. [2020-09-18 03:01:02,872 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-09-18 03:01:02,908 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. [2020-09-18 03:01:03,014 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 4550 [2020-09-18 03:01:03,015 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-18 03:01:04,649 WARN L193 SmtUtils]: Spent 728.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-09-18 03:01:05,214 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-09-18 03:01:05,582 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-09-18 03:01:05,689 INFO L206 etLargeBlockEncoding]: Checked pairs total: 11131 [2020-09-18 03:01:05,689 INFO L214 etLargeBlockEncoding]: Total number of compositions: 75 [2020-09-18 03:01:05,690 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 55 places, 48 transitions, 194 flow