/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf -i ../../../trunk/examples/svcomp/pthread-nondet/nondet-array-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 05:56:29,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 05:56:29,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 05:56:29,889 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 05:56:29,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 05:56:29,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 05:56:29,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 05:56:29,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 05:56:29,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 05:56:29,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 05:56:29,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 05:56:29,910 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 05:56:29,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 05:56:29,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 05:56:29,912 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 05:56:29,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 05:56:29,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 05:56:29,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 05:56:29,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 05:56:29,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 05:56:29,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 05:56:29,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 05:56:29,921 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 05:56:29,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 05:56:29,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 05:56:29,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 05:56:29,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 05:56:29,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 05:56:29,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 05:56:29,927 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 05:56:29,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 05:56:29,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 05:56:29,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 05:56:29,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 05:56:29,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 05:56:29,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 05:56:29,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 05:56:29,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 05:56:29,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 05:56:29,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 05:56:29,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 05:56:29,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf [2020-10-16 05:56:29,957 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 05:56:29,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 05:56:29,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 05:56:29,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 05:56:29,959 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 05:56:29,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 05:56:29,959 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 05:56:29,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 05:56:29,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 05:56:29,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 05:56:29,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 05:56:29,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 05:56:29,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 05:56:29,961 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 05:56:29,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 05:56:29,961 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 05:56:29,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 05:56:29,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 05:56:29,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 05:56:29,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 05:56:29,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 05:56:29,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 05:56:29,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 05:56:29,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 05:56:29,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 05:56:29,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 05:56:29,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 05:56:29,964 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 05:56:29,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 05:56:30,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 05:56:30,268 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 05:56:30,273 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 05:56:30,274 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 05:56:30,274 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 05:56:30,275 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-nondet/nondet-array-2.i [2020-10-16 05:56:30,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f59586582/19a07236cb8a49619e18d1a4d8886a81/FLAG7ae7e65f4 [2020-10-16 05:56:30,784 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 05:56:30,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-nondet/nondet-array-2.i [2020-10-16 05:56:30,799 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f59586582/19a07236cb8a49619e18d1a4d8886a81/FLAG7ae7e65f4 [2020-10-16 05:56:31,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f59586582/19a07236cb8a49619e18d1a4d8886a81 [2020-10-16 05:56:31,117 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 05:56:31,119 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 05:56:31,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 05:56:31,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 05:56:31,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 05:56:31,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:56:31" (1/1) ... [2020-10-16 05:56:31,128 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa613b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:31, skipping insertion in model container [2020-10-16 05:56:31,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:56:31" (1/1) ... [2020-10-16 05:56:31,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 05:56:31,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 05:56:31,686 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 05:56:31,701 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 05:56:31,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 05:56:31,817 INFO L208 MainTranslator]: Completed translation [2020-10-16 05:56:31,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:31 WrapperNode [2020-10-16 05:56:31,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 05:56:31,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 05:56:31,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 05:56:31,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 05:56:31,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:31" (1/1) ... [2020-10-16 05:56:31,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:31" (1/1) ... [2020-10-16 05:56:31,878 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 05:56:31,878 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 05:56:31,878 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 05:56:31,878 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 05:56:31,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:31" (1/1) ... [2020-10-16 05:56:31,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:31" (1/1) ... [2020-10-16 05:56:31,892 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:31" (1/1) ... [2020-10-16 05:56:31,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:31" (1/1) ... [2020-10-16 05:56:31,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:31" (1/1) ... [2020-10-16 05:56:31,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:31" (1/1) ... [2020-10-16 05:56:31,907 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:31" (1/1) ... [2020-10-16 05:56:31,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 05:56:31,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 05:56:31,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 05:56:31,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 05:56:31,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 05:56:32,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-10-16 05:56:32,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 05:56:32,009 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 05:56:32,009 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2020-10-16 05:56:32,010 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2020-10-16 05:56:32,011 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 05:56:32,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 05:56:32,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 05:56:32,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 05:56:32,014 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 05:56:32,482 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 05:56:32,483 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-16 05:56:32,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:56:32 BoogieIcfgContainer [2020-10-16 05:56:32,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 05:56:32,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 05:56:32,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 05:56:32,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 05:56:32,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:56:31" (1/3) ... [2020-10-16 05:56:32,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262245ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:56:32, skipping insertion in model container [2020-10-16 05:56:32,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:56:31" (2/3) ... [2020-10-16 05:56:32,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@262245ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:56:32, skipping insertion in model container [2020-10-16 05:56:32,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:56:32" (3/3) ... [2020-10-16 05:56:32,496 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-array-2.i [2020-10-16 05:56:32,508 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 05:56:32,517 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 05:56:32,519 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 05:56:32,542 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:32,543 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:32,543 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:32,543 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:32,544 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:32,544 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:32,544 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:32,548 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:32,548 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:32,549 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:32,549 WARN L313 ript$VariableManager]: TermVariabe thrThread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:32,549 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:32,574 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:32,596 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:32,596 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:32,596 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:32,596 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:32,597 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:32,597 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:32,597 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:32,597 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:32,611 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 71 transitions, 150 flow [2020-10-16 05:56:32,659 INFO L129 PetriNetUnfolder]: 12/103 cut-off events. [2020-10-16 05:56:32,659 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 05:56:32,665 INFO L80 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 103 events. 12/103 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 206 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2020-10-16 05:56:32,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 71 transitions, 150 flow [2020-10-16 05:56:32,672 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 64 transitions, 136 flow [2020-10-16 05:56:32,674 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:32,677 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 64 transitions, 136 flow [2020-10-16 05:56:32,680 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 61 places, 64 transitions, 136 flow [2020-10-16 05:56:32,681 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 64 transitions, 136 flow [2020-10-16 05:56:32,702 INFO L129 PetriNetUnfolder]: 10/89 cut-off events. [2020-10-16 05:56:32,703 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 05:56:32,703 INFO L80 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 89 events. 10/89 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 157 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2020-10-16 05:56:32,705 INFO L117 LiptonReduction]: Number of co-enabled transitions 300 [2020-10-16 05:56:34,010 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-16 05:56:34,310 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 05:56:34,388 INFO L132 LiptonReduction]: Checked pairs total: 320 [2020-10-16 05:56:34,389 INFO L134 LiptonReduction]: Total number of compositions: 56 [2020-10-16 05:56:34,391 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1719 [2020-10-16 05:56:34,398 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 05:56:34,398 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:34,398 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:34,399 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:34,400 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:34,406 INFO L82 PathProgramCache]: Analyzing trace with hash 8319830, now seen corresponding path program 1 times [2020-10-16 05:56:34,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:34,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676844766] [2020-10-16 05:56:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:34,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676844766] [2020-10-16 05:56:34,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:34,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:34,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118751387] [2020-10-16 05:56:34,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:34,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:34,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:34,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:34,619 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 127 [2020-10-16 05:56:34,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 13 transitions, 34 flow. Second operand 3 states. [2020-10-16 05:56:34,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:34,622 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 127 [2020-10-16 05:56:34,623 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:34,666 INFO L129 PetriNetUnfolder]: 2/18 cut-off events. [2020-10-16 05:56:34,666 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 05:56:34,666 INFO L80 FinitePrefix]: Finished finitePrefix Result has 39 conditions, 18 events. 2/18 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 16. Up to 13 conditions per place. [2020-10-16 05:56:34,668 INFO L132 encePairwiseOnDemand]: 124/127 looper letters, 8 selfloop transitions, 2 changer transitions 0/14 dead transitions. [2020-10-16 05:56:34,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 14 transitions, 56 flow [2020-10-16 05:56:34,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:34,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2020-10-16 05:56:34,685 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5013123359580053 [2020-10-16 05:56:34,686 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 191 transitions. [2020-10-16 05:56:34,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 191 transitions. [2020-10-16 05:56:34,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:34,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 191 transitions. [2020-10-16 05:56:34,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:34,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:34,701 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:34,704 INFO L185 Difference]: Start difference. First operand has 14 places, 13 transitions, 34 flow. Second operand 3 states and 191 transitions. [2020-10-16 05:56:34,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 14 transitions, 56 flow [2020-10-16 05:56:34,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 14 transitions, 56 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:34,710 INFO L241 Difference]: Finished difference. Result has 17 places, 13 transitions, 42 flow [2020-10-16 05:56:34,713 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=127, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=17, PETRI_TRANSITIONS=13} [2020-10-16 05:56:34,714 INFO L342 CegarLoopForPetriNet]: 14 programPoint places, 3 predicate places. [2020-10-16 05:56:34,714 INFO L481 AbstractCegarLoop]: Abstraction has has 17 places, 13 transitions, 42 flow [2020-10-16 05:56:34,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:34,715 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:34,715 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2020-10-16 05:56:34,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 05:56:34,716 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:34,716 INFO L82 PathProgramCache]: Analyzing trace with hash -603160687, now seen corresponding path program 1 times [2020-10-16 05:56:34,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:34,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594937882] [2020-10-16 05:56:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:34,752 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:34,792 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:34,834 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:34,834 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:34,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 05:56:34,836 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:34,838 WARN L371 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:34,840 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-16 05:56:34,869 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,869 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,869 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,869 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,870 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,870 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,870 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,870 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,871 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,871 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,871 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,871 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,871 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,872 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,872 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,872 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,872 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,873 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,873 WARN L313 ript$VariableManager]: TermVariabe thrThread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,874 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,874 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,874 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,875 WARN L313 ript$VariableManager]: TermVariabe thrThread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,875 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:34,877 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:34,878 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:34,878 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:34,878 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:34,878 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:34,878 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:34,879 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:34,879 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:34,879 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:34,880 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 75 places, 78 transitions, 174 flow [2020-10-16 05:56:34,911 INFO L129 PetriNetUnfolder]: 23/183 cut-off events. [2020-10-16 05:56:34,911 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 05:56:34,912 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 462 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 105. Up to 8 conditions per place. [2020-10-16 05:56:34,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 78 transitions, 174 flow [2020-10-16 05:56:34,914 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 71 transitions, 160 flow [2020-10-16 05:56:34,914 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:34,914 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 71 transitions, 160 flow [2020-10-16 05:56:34,914 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 71 transitions, 160 flow [2020-10-16 05:56:34,914 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 69 places, 71 transitions, 160 flow [2020-10-16 05:56:34,936 INFO L129 PetriNetUnfolder]: 19/155 cut-off events. [2020-10-16 05:56:34,936 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 05:56:34,937 INFO L80 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 155 events. 19/155 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 366 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 91. Up to 8 conditions per place. [2020-10-16 05:56:34,939 INFO L117 LiptonReduction]: Number of co-enabled transitions 760 [2020-10-16 05:56:35,963 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-16 05:56:36,261 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 05:56:36,267 INFO L132 LiptonReduction]: Checked pairs total: 1958 [2020-10-16 05:56:36,267 INFO L134 LiptonReduction]: Total number of compositions: 54 [2020-10-16 05:56:36,268 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1354 [2020-10-16 05:56:36,270 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 05:56:36,270 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:36,271 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:36,271 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:36,271 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:36,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:36,271 INFO L82 PathProgramCache]: Analyzing trace with hash 12600976, now seen corresponding path program 1 times [2020-10-16 05:56:36,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:36,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227182241] [2020-10-16 05:56:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:36,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:36,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227182241] [2020-10-16 05:56:36,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:36,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:36,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257753898] [2020-10-16 05:56:36,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:36,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:36,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:36,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:36,316 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 132 [2020-10-16 05:56:36,316 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 22 transitions, 62 flow. Second operand 3 states. [2020-10-16 05:56:36,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:36,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 132 [2020-10-16 05:56:36,317 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:36,347 INFO L129 PetriNetUnfolder]: 6/45 cut-off events. [2020-10-16 05:56:36,347 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 05:56:36,347 INFO L80 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 45 events. 6/45 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 88 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 45. Up to 26 conditions per place. [2020-10-16 05:56:36,348 INFO L132 encePairwiseOnDemand]: 129/132 looper letters, 9 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2020-10-16 05:56:36,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 24 transitions, 88 flow [2020-10-16 05:56:36,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:36,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:36,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 213 transitions. [2020-10-16 05:56:36,351 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2020-10-16 05:56:36,351 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 213 transitions. [2020-10-16 05:56:36,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 213 transitions. [2020-10-16 05:56:36,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:36,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 213 transitions. [2020-10-16 05:56:36,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:36,355 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:36,355 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:36,355 INFO L185 Difference]: Start difference. First operand has 24 places, 22 transitions, 62 flow. Second operand 3 states and 213 transitions. [2020-10-16 05:56:36,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 24 transitions, 88 flow [2020-10-16 05:56:36,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 24 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:36,357 INFO L241 Difference]: Finished difference. Result has 27 places, 23 transitions, 74 flow [2020-10-16 05:56:36,357 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2020-10-16 05:56:36,357 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2020-10-16 05:56:36,357 INFO L481 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 74 flow [2020-10-16 05:56:36,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:36,358 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:36,358 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:36,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 05:56:36,358 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:36,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:36,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1920961359, now seen corresponding path program 1 times [2020-10-16 05:56:36,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:36,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603504867] [2020-10-16 05:56:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:36,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603504867] [2020-10-16 05:56:36,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:36,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:36,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514239120] [2020-10-16 05:56:36,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:36,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:36,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:36,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:36,449 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 132 [2020-10-16 05:56:36,449 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 74 flow. Second operand 4 states. [2020-10-16 05:56:36,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:36,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 132 [2020-10-16 05:56:36,450 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:36,493 INFO L129 PetriNetUnfolder]: 5/49 cut-off events. [2020-10-16 05:56:36,493 INFO L130 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2020-10-16 05:56:36,494 INFO L80 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 49 events. 5/49 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 1 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 83. Up to 20 conditions per place. [2020-10-16 05:56:36,494 INFO L132 encePairwiseOnDemand]: 125/132 looper letters, 8 selfloop transitions, 6 changer transitions 0/27 dead transitions. [2020-10-16 05:56:36,494 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 110 flow [2020-10-16 05:56:36,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:36,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:36,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 284 transitions. [2020-10-16 05:56:36,498 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2020-10-16 05:56:36,498 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 284 transitions. [2020-10-16 05:56:36,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 284 transitions. [2020-10-16 05:56:36,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:36,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 284 transitions. [2020-10-16 05:56:36,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:36,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:36,501 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:36,501 INFO L185 Difference]: Start difference. First operand has 27 places, 23 transitions, 74 flow. Second operand 4 states and 284 transitions. [2020-10-16 05:56:36,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 110 flow [2020-10-16 05:56:36,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:36,504 INFO L241 Difference]: Finished difference. Result has 30 places, 25 transitions, 100 flow [2020-10-16 05:56:36,504 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=132, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2020-10-16 05:56:36,505 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 6 predicate places. [2020-10-16 05:56:36,505 INFO L481 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 100 flow [2020-10-16 05:56:36,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:36,505 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:36,505 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2020-10-16 05:56:36,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 05:56:36,506 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:36,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:36,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1347590472, now seen corresponding path program 1 times [2020-10-16 05:56:36,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:36,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354186012] [2020-10-16 05:56:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:36,536 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:36,550 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:36,558 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:36,558 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:36,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 05:56:36,558 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:36,559 WARN L371 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:36,560 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-16 05:56:36,566 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,566 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,567 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,567 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,567 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,567 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,567 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,567 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,568 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,568 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,568 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,568 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,568 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,568 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,569 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,569 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,569 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,569 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,569 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,569 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,570 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,570 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,570 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,570 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,570 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,571 WARN L313 ript$VariableManager]: TermVariabe thrThread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,572 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,572 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,573 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,573 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,573 WARN L313 ript$VariableManager]: TermVariabe thrThread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,574 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,574 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,574 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,575 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,575 WARN L313 ript$VariableManager]: TermVariabe thrThread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:36,578 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:36,578 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:36,578 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:36,578 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:36,579 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:36,579 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:36,579 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:36,579 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:36,579 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:36,581 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 83 places, 85 transitions, 200 flow [2020-10-16 05:56:36,617 INFO L129 PetriNetUnfolder]: 45/330 cut-off events. [2020-10-16 05:56:36,617 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 05:56:36,618 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 1084 event pairs, 1 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 191. Up to 16 conditions per place. [2020-10-16 05:56:36,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 85 transitions, 200 flow [2020-10-16 05:56:36,620 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 78 transitions, 186 flow [2020-10-16 05:56:36,620 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:36,621 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 78 transitions, 186 flow [2020-10-16 05:56:36,621 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 78 transitions, 186 flow [2020-10-16 05:56:36,621 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 77 places, 78 transitions, 186 flow [2020-10-16 05:56:36,647 INFO L129 PetriNetUnfolder]: 37/274 cut-off events. [2020-10-16 05:56:36,647 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 05:56:36,649 INFO L80 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 274 events. 37/274 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 784 event pairs, 1 based on Foata normal form. 0/233 useless extension candidates. Maximal degree in co-relation 163. Up to 16 conditions per place. [2020-10-16 05:56:36,656 INFO L117 LiptonReduction]: Number of co-enabled transitions 1260 [2020-10-16 05:56:38,110 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 84 [2020-10-16 05:56:38,224 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-16 05:56:38,371 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-16 05:56:38,444 INFO L132 LiptonReduction]: Checked pairs total: 3644 [2020-10-16 05:56:38,444 INFO L134 LiptonReduction]: Total number of compositions: 57 [2020-10-16 05:56:38,444 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1824 [2020-10-16 05:56:38,446 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 05:56:38,446 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:38,446 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:38,446 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:38,447 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:38,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:38,447 INFO L82 PathProgramCache]: Analyzing trace with hash 17184692, now seen corresponding path program 1 times [2020-10-16 05:56:38,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:38,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172073403] [2020-10-16 05:56:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:38,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172073403] [2020-10-16 05:56:38,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:38,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:38,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103677274] [2020-10-16 05:56:38,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:38,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:38,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:38,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:38,484 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 142 [2020-10-16 05:56:38,484 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 84 flow. Second operand 3 states. [2020-10-16 05:56:38,484 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:38,485 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 142 [2020-10-16 05:56:38,485 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:38,529 INFO L129 PetriNetUnfolder]: 15/85 cut-off events. [2020-10-16 05:56:38,529 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 05:56:38,530 INFO L80 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 85 events. 15/85 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 208 event pairs, 1 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 89. Up to 49 conditions per place. [2020-10-16 05:56:38,530 INFO L132 encePairwiseOnDemand]: 139/142 looper letters, 9 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2020-10-16 05:56:38,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 110 flow [2020-10-16 05:56:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:38,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 240 transitions. [2020-10-16 05:56:38,533 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5633802816901409 [2020-10-16 05:56:38,533 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 240 transitions. [2020-10-16 05:56:38,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 240 transitions. [2020-10-16 05:56:38,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:38,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 240 transitions. [2020-10-16 05:56:38,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:38,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:38,536 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:38,536 INFO L185 Difference]: Start difference. First operand has 30 places, 27 transitions, 84 flow. Second operand 3 states and 240 transitions. [2020-10-16 05:56:38,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 110 flow [2020-10-16 05:56:38,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 110 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:38,539 INFO L241 Difference]: Finished difference. Result has 33 places, 28 transitions, 96 flow [2020-10-16 05:56:38,539 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2020-10-16 05:56:38,539 INFO L342 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2020-10-16 05:56:38,539 INFO L481 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 96 flow [2020-10-16 05:56:38,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:38,539 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:38,540 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:38,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 05:56:38,540 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:38,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:38,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1206663488, now seen corresponding path program 1 times [2020-10-16 05:56:38,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:38,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023477994] [2020-10-16 05:56:38,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:38,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023477994] [2020-10-16 05:56:38,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:38,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:38,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803413134] [2020-10-16 05:56:38,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:38,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:38,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:38,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:38,578 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 142 [2020-10-16 05:56:38,578 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 96 flow. Second operand 4 states. [2020-10-16 05:56:38,578 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:38,578 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 142 [2020-10-16 05:56:38,578 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:38,626 INFO L129 PetriNetUnfolder]: 15/100 cut-off events. [2020-10-16 05:56:38,626 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2020-10-16 05:56:38,627 INFO L80 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 100 events. 15/100 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 280 event pairs, 4 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 181. Up to 44 conditions per place. [2020-10-16 05:56:38,628 INFO L132 encePairwiseOnDemand]: 135/142 looper letters, 8 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2020-10-16 05:56:38,628 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 132 flow [2020-10-16 05:56:38,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:38,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:38,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 320 transitions. [2020-10-16 05:56:38,631 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5633802816901409 [2020-10-16 05:56:38,631 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 320 transitions. [2020-10-16 05:56:38,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 320 transitions. [2020-10-16 05:56:38,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:38,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 320 transitions. [2020-10-16 05:56:38,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:38,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:38,634 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:38,635 INFO L185 Difference]: Start difference. First operand has 33 places, 28 transitions, 96 flow. Second operand 4 states and 320 transitions. [2020-10-16 05:56:38,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 132 flow [2020-10-16 05:56:38,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:38,637 INFO L241 Difference]: Finished difference. Result has 36 places, 30 transitions, 122 flow [2020-10-16 05:56:38,637 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=122, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2020-10-16 05:56:38,637 INFO L342 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2020-10-16 05:56:38,638 INFO L481 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 122 flow [2020-10-16 05:56:38,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:38,638 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:38,638 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2020-10-16 05:56:38,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 05:56:38,638 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:38,639 INFO L82 PathProgramCache]: Analyzing trace with hash 703601145, now seen corresponding path program 1 times [2020-10-16 05:56:38,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:38,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473546900] [2020-10-16 05:56:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:38,656 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:38,669 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:38,675 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:38,676 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:38,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-16 05:56:38,676 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:38,677 WARN L371 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:38,677 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-16 05:56:38,684 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,685 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,685 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,685 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,685 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,685 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,686 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,686 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,686 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,686 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,686 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,687 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,687 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,687 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,687 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,687 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,687 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,688 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,688 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,688 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,688 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,688 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,688 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,689 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,689 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,689 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,689 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,689 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,690 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,690 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,690 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,690 WARN L313 ript$VariableManager]: TermVariabe thrThread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,690 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,693 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,693 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,693 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,693 WARN L313 ript$VariableManager]: TermVariabe thrThread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,694 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,702 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,703 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,703 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,703 WARN L313 ript$VariableManager]: TermVariabe thrThread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,703 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,709 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,710 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,710 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,710 WARN L313 ript$VariableManager]: TermVariabe thrThread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,710 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:38,729 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:38,730 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:38,730 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:38,730 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:38,731 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:38,731 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:38,731 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:38,731 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:38,731 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:38,735 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 91 places, 92 transitions, 228 flow [2020-10-16 05:56:38,822 INFO L129 PetriNetUnfolder]: 91/613 cut-off events. [2020-10-16 05:56:38,822 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-16 05:56:38,829 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 2762 event pairs, 6 based on Foata normal form. 0/506 useless extension candidates. Maximal degree in co-relation 350. Up to 32 conditions per place. [2020-10-16 05:56:38,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 91 places, 92 transitions, 228 flow [2020-10-16 05:56:38,832 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 85 transitions, 214 flow [2020-10-16 05:56:38,832 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:38,832 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 85 transitions, 214 flow [2020-10-16 05:56:38,832 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 85 transitions, 214 flow [2020-10-16 05:56:38,832 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 85 places, 85 transitions, 214 flow [2020-10-16 05:56:38,891 INFO L129 PetriNetUnfolder]: 75/501 cut-off events. [2020-10-16 05:56:38,891 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-16 05:56:38,893 INFO L80 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 501 events. 75/501 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2027 event pairs, 6 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 294. Up to 32 conditions per place. [2020-10-16 05:56:38,902 INFO L117 LiptonReduction]: Number of co-enabled transitions 1840 [2020-10-16 05:56:39,958 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2020-10-16 05:56:40,211 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 05:56:40,284 INFO L132 LiptonReduction]: Checked pairs total: 6546 [2020-10-16 05:56:40,285 INFO L134 LiptonReduction]: Total number of compositions: 59 [2020-10-16 05:56:40,285 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1453 [2020-10-16 05:56:40,286 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 05:56:40,286 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:40,287 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:40,287 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:40,287 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:40,287 INFO L82 PathProgramCache]: Analyzing trace with hash 22048377, now seen corresponding path program 1 times [2020-10-16 05:56:40,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:40,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830015513] [2020-10-16 05:56:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:40,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:40,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830015513] [2020-10-16 05:56:40,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:40,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:40,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281143636] [2020-10-16 05:56:40,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:40,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:40,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:40,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:40,330 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 151 [2020-10-16 05:56:40,330 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 108 flow. Second operand 3 states. [2020-10-16 05:56:40,330 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:40,330 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 151 [2020-10-16 05:56:40,330 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:40,381 INFO L129 PetriNetUnfolder]: 36/161 cut-off events. [2020-10-16 05:56:40,381 INFO L130 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2020-10-16 05:56:40,382 INFO L80 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 161 events. 36/161 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 514 event pairs, 6 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 166. Up to 92 conditions per place. [2020-10-16 05:56:40,383 INFO L132 encePairwiseOnDemand]: 148/151 looper letters, 9 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2020-10-16 05:56:40,383 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 134 flow [2020-10-16 05:56:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 261 transitions. [2020-10-16 05:56:40,385 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5761589403973509 [2020-10-16 05:56:40,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 261 transitions. [2020-10-16 05:56:40,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 261 transitions. [2020-10-16 05:56:40,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:40,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 261 transitions. [2020-10-16 05:56:40,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:40,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:40,388 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:40,388 INFO L185 Difference]: Start difference. First operand has 36 places, 32 transitions, 108 flow. Second operand 3 states and 261 transitions. [2020-10-16 05:56:40,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 134 flow [2020-10-16 05:56:40,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 134 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:40,395 INFO L241 Difference]: Finished difference. Result has 39 places, 33 transitions, 120 flow [2020-10-16 05:56:40,395 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2020-10-16 05:56:40,396 INFO L342 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2020-10-16 05:56:40,396 INFO L481 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 120 flow [2020-10-16 05:56:40,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:40,396 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:40,396 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:40,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 05:56:40,396 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:40,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:40,397 INFO L82 PathProgramCache]: Analyzing trace with hash -161501305, now seen corresponding path program 1 times [2020-10-16 05:56:40,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:40,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880485] [2020-10-16 05:56:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:40,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880485] [2020-10-16 05:56:40,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:40,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:40,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651701716] [2020-10-16 05:56:40,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:40,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:40,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:40,473 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 151 [2020-10-16 05:56:40,474 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 120 flow. Second operand 4 states. [2020-10-16 05:56:40,474 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:40,474 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 151 [2020-10-16 05:56:40,475 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:40,547 INFO L129 PetriNetUnfolder]: 38/194 cut-off events. [2020-10-16 05:56:40,547 INFO L130 PetriNetUnfolder]: For 58/58 co-relation queries the response was YES. [2020-10-16 05:56:40,548 INFO L80 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 194 events. 38/194 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 756 event pairs, 12 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 361. Up to 89 conditions per place. [2020-10-16 05:56:40,550 INFO L132 encePairwiseOnDemand]: 144/151 looper letters, 8 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2020-10-16 05:56:40,550 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 156 flow [2020-10-16 05:56:40,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:40,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:40,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 348 transitions. [2020-10-16 05:56:40,552 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5761589403973509 [2020-10-16 05:56:40,552 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 348 transitions. [2020-10-16 05:56:40,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 348 transitions. [2020-10-16 05:56:40,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:40,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 348 transitions. [2020-10-16 05:56:40,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:40,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:40,556 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:40,556 INFO L185 Difference]: Start difference. First operand has 39 places, 33 transitions, 120 flow. Second operand 4 states and 348 transitions. [2020-10-16 05:56:40,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 156 flow [2020-10-16 05:56:40,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:40,560 INFO L241 Difference]: Finished difference. Result has 42 places, 35 transitions, 146 flow [2020-10-16 05:56:40,561 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2020-10-16 05:56:40,561 INFO L342 CegarLoopForPetriNet]: 36 programPoint places, 6 predicate places. [2020-10-16 05:56:40,561 INFO L481 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 146 flow [2020-10-16 05:56:40,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:40,561 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:40,562 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:40,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 05:56:40,562 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:40,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:40,562 INFO L82 PathProgramCache]: Analyzing trace with hash -582908876, now seen corresponding path program 1 times [2020-10-16 05:56:40,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:40,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743807181] [2020-10-16 05:56:40,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:40,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743807181] [2020-10-16 05:56:40,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53879212] [2020-10-16 05:56:40,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:40,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:56:40,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:40,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:40,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 05:56:40,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532079521] [2020-10-16 05:56:40,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:56:40,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:40,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:56:40,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:56:40,781 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 151 [2020-10-16 05:56:40,782 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 146 flow. Second operand 6 states. [2020-10-16 05:56:40,782 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:40,782 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 151 [2020-10-16 05:56:40,783 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:40,868 INFO L129 PetriNetUnfolder]: 37/189 cut-off events. [2020-10-16 05:56:40,868 INFO L130 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2020-10-16 05:56:40,868 INFO L80 FinitePrefix]: Finished finitePrefix Result has 482 conditions, 189 events. 37/189 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 743 event pairs, 12 based on Foata normal form. 1/175 useless extension candidates. Maximal degree in co-relation 254. Up to 108 conditions per place. [2020-10-16 05:56:40,870 INFO L132 encePairwiseOnDemand]: 148/151 looper letters, 12 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2020-10-16 05:56:40,870 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 184 flow [2020-10-16 05:56:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:40,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 346 transitions. [2020-10-16 05:56:40,872 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5728476821192053 [2020-10-16 05:56:40,872 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 346 transitions. [2020-10-16 05:56:40,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 346 transitions. [2020-10-16 05:56:40,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:40,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 346 transitions. [2020-10-16 05:56:40,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:40,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:40,875 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:40,876 INFO L185 Difference]: Start difference. First operand has 42 places, 35 transitions, 146 flow. Second operand 4 states and 346 transitions. [2020-10-16 05:56:40,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 184 flow [2020-10-16 05:56:40,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 38 transitions, 183 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:40,878 INFO L241 Difference]: Finished difference. Result has 45 places, 36 transitions, 161 flow [2020-10-16 05:56:40,878 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=45, PETRI_TRANSITIONS=36} [2020-10-16 05:56:40,879 INFO L342 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2020-10-16 05:56:40,879 INFO L481 AbstractCegarLoop]: Abstraction has has 45 places, 36 transitions, 161 flow [2020-10-16 05:56:40,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:56:40,879 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:40,879 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:41,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-16 05:56:41,094 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:41,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:41,094 INFO L82 PathProgramCache]: Analyzing trace with hash -653450535, now seen corresponding path program 1 times [2020-10-16 05:56:41,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:41,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321581364] [2020-10-16 05:56:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:41,109 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:41,123 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:41,131 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:41,131 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:41,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-16 05:56:41,132 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:41,132 WARN L371 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:41,133 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2020-10-16 05:56:41,141 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,141 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,141 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,141 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,141 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,142 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,142 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,142 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,142 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,142 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,142 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,142 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,143 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,143 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,143 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,143 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,144 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,144 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,144 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,144 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,144 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,144 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,145 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,145 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,145 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,145 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,145 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,145 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,146 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,146 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,146 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,146 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,146 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,146 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,147 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,147 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,147 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,147 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,147 WARN L313 ript$VariableManager]: TermVariabe thrThread1of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,148 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,149 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,149 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,150 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,150 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,150 WARN L313 ript$VariableManager]: TermVariabe thrThread2of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,151 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,151 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,151 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,152 WARN L313 ript$VariableManager]: TermVariabe thrThread3of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,152 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,153 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,153 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,153 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,153 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,154 WARN L313 ript$VariableManager]: TermVariabe thrThread4of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,155 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,155 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,155 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,155 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of5ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,155 WARN L313 ript$VariableManager]: TermVariabe thrThread5of5ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:41,160 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:41,160 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:41,161 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:41,161 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:41,161 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:41,161 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:41,161 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:41,161 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:41,161 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:41,163 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 99 transitions, 258 flow [2020-10-16 05:56:41,279 INFO L129 PetriNetUnfolder]: 189/1172 cut-off events. [2020-10-16 05:56:41,279 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-16 05:56:41,283 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 6756 event pairs, 23 based on Foata normal form. 0/967 useless extension candidates. Maximal degree in co-relation 658. Up to 80 conditions per place. [2020-10-16 05:56:41,284 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 99 transitions, 258 flow [2020-10-16 05:56:41,288 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 92 transitions, 244 flow [2020-10-16 05:56:41,289 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:41,289 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 92 transitions, 244 flow [2020-10-16 05:56:41,289 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 92 transitions, 244 flow [2020-10-16 05:56:41,289 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 93 places, 92 transitions, 244 flow [2020-10-16 05:56:41,388 INFO L129 PetriNetUnfolder]: 157/948 cut-off events. [2020-10-16 05:56:41,388 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-16 05:56:41,391 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1059 conditions, 948 events. 157/948 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4980 event pairs, 23 based on Foata normal form. 0/807 useless extension candidates. Maximal degree in co-relation 546. Up to 80 conditions per place. [2020-10-16 05:56:41,415 INFO L117 LiptonReduction]: Number of co-enabled transitions 2500 [2020-10-16 05:56:42,908 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-16 05:56:43,068 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 05:56:43,082 INFO L132 LiptonReduction]: Checked pairs total: 8810 [2020-10-16 05:56:43,082 INFO L134 LiptonReduction]: Total number of compositions: 59 [2020-10-16 05:56:43,082 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1793 [2020-10-16 05:56:43,084 INFO L129 PetriNetUnfolder]: 1/7 cut-off events. [2020-10-16 05:56:43,084 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:43,085 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:43,085 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:43,085 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:43,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:43,085 INFO L82 PathProgramCache]: Analyzing trace with hash 27129011, now seen corresponding path program 1 times [2020-10-16 05:56:43,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:43,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411981955] [2020-10-16 05:56:43,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:43,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411981955] [2020-10-16 05:56:43,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:43,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:43,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895426435] [2020-10-16 05:56:43,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:43,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:43,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:43,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:43,114 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 05:56:43,114 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 134 flow. Second operand 3 states. [2020-10-16 05:56:43,115 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:43,115 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 05:56:43,115 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:43,179 INFO L129 PetriNetUnfolder]: 85/313 cut-off events. [2020-10-16 05:56:43,179 INFO L130 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2020-10-16 05:56:43,180 INFO L80 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 313 events. 85/313 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1219 event pairs, 23 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 312. Up to 175 conditions per place. [2020-10-16 05:56:43,182 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 9 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2020-10-16 05:56:43,182 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 39 transitions, 160 flow [2020-10-16 05:56:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 294 transitions. [2020-10-16 05:56:43,184 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.620253164556962 [2020-10-16 05:56:43,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 294 transitions. [2020-10-16 05:56:43,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 294 transitions. [2020-10-16 05:56:43,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:43,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 294 transitions. [2020-10-16 05:56:43,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:43,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:43,187 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:43,187 INFO L185 Difference]: Start difference. First operand has 42 places, 37 transitions, 134 flow. Second operand 3 states and 294 transitions. [2020-10-16 05:56:43,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 39 transitions, 160 flow [2020-10-16 05:56:43,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:43,191 INFO L241 Difference]: Finished difference. Result has 45 places, 38 transitions, 146 flow [2020-10-16 05:56:43,191 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2020-10-16 05:56:43,192 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2020-10-16 05:56:43,192 INFO L481 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 146 flow [2020-10-16 05:56:43,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:43,192 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:43,192 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:43,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-16 05:56:43,192 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash -173965401, now seen corresponding path program 1 times [2020-10-16 05:56:43,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:43,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129413683] [2020-10-16 05:56:43,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:43,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129413683] [2020-10-16 05:56:43,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:43,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:43,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581541037] [2020-10-16 05:56:43,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:43,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:43,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:43,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:43,229 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 05:56:43,230 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 146 flow. Second operand 4 states. [2020-10-16 05:56:43,230 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:43,230 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 05:56:43,230 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:43,298 INFO L129 PetriNetUnfolder]: 90/375 cut-off events. [2020-10-16 05:56:43,298 INFO L130 PetriNetUnfolder]: For 125/125 co-relation queries the response was YES. [2020-10-16 05:56:43,299 INFO L80 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 375 events. 90/375 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1698 event pairs, 33 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 707. Up to 175 conditions per place. [2020-10-16 05:56:43,301 INFO L132 encePairwiseOnDemand]: 151/158 looper letters, 8 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2020-10-16 05:56:43,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 182 flow [2020-10-16 05:56:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 392 transitions. [2020-10-16 05:56:43,304 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.620253164556962 [2020-10-16 05:56:43,304 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 392 transitions. [2020-10-16 05:56:43,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 392 transitions. [2020-10-16 05:56:43,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:43,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 392 transitions. [2020-10-16 05:56:43,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:43,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:43,307 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:43,307 INFO L185 Difference]: Start difference. First operand has 45 places, 38 transitions, 146 flow. Second operand 4 states and 392 transitions. [2020-10-16 05:56:43,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 182 flow [2020-10-16 05:56:43,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:43,311 INFO L241 Difference]: Finished difference. Result has 48 places, 40 transitions, 172 flow [2020-10-16 05:56:43,312 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2020-10-16 05:56:43,312 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 6 predicate places. [2020-10-16 05:56:43,312 INFO L481 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 172 flow [2020-10-16 05:56:43,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:43,312 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:43,312 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:43,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-16 05:56:43,313 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:43,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:43,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1927840068, now seen corresponding path program 1 times [2020-10-16 05:56:43,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:43,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417359368] [2020-10-16 05:56:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:43,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417359368] [2020-10-16 05:56:43,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950619060] [2020-10-16 05:56:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:43,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:56:43,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:43,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:43,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 05:56:43,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009025754] [2020-10-16 05:56:43,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:56:43,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:43,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:56:43,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:56:43,465 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 05:56:43,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 40 transitions, 172 flow. Second operand 6 states. [2020-10-16 05:56:43,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:43,467 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 05:56:43,467 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:43,544 INFO L129 PetriNetUnfolder]: 89/370 cut-off events. [2020-10-16 05:56:43,544 INFO L130 PetriNetUnfolder]: For 170/170 co-relation queries the response was YES. [2020-10-16 05:56:43,546 INFO L80 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 370 events. 89/370 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1693 event pairs, 33 based on Foata normal form. 1/340 useless extension candidates. Maximal degree in co-relation 491. Up to 212 conditions per place. [2020-10-16 05:56:43,548 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 12 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2020-10-16 05:56:43,548 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 210 flow [2020-10-16 05:56:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 390 transitions. [2020-10-16 05:56:43,551 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6170886075949367 [2020-10-16 05:56:43,551 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 390 transitions. [2020-10-16 05:56:43,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 390 transitions. [2020-10-16 05:56:43,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:43,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 390 transitions. [2020-10-16 05:56:43,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:43,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:43,554 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:43,554 INFO L185 Difference]: Start difference. First operand has 48 places, 40 transitions, 172 flow. Second operand 4 states and 390 transitions. [2020-10-16 05:56:43,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 210 flow [2020-10-16 05:56:43,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 43 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:43,557 INFO L241 Difference]: Finished difference. Result has 51 places, 41 transitions, 187 flow [2020-10-16 05:56:43,558 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=51, PETRI_TRANSITIONS=41} [2020-10-16 05:56:43,558 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2020-10-16 05:56:43,558 INFO L481 AbstractCegarLoop]: Abstraction has has 51 places, 41 transitions, 187 flow [2020-10-16 05:56:43,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:56:43,558 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:43,558 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:43,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 05:56:43,761 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash -890711517, now seen corresponding path program 1 times [2020-10-16 05:56:43,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:43,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770000488] [2020-10-16 05:56:43,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:43,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770000488] [2020-10-16 05:56:43,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018151315] [2020-10-16 05:56:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:43,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 05:56:43,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:43,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:43,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:43,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 05:56:43,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780321237] [2020-10-16 05:56:43,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 05:56:43,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:43,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 05:56:43,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 05:56:43,931 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 158 [2020-10-16 05:56:43,931 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 41 transitions, 187 flow. Second operand 8 states. [2020-10-16 05:56:43,931 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:43,931 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 158 [2020-10-16 05:56:43,932 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:44,007 INFO L129 PetriNetUnfolder]: 87/362 cut-off events. [2020-10-16 05:56:44,007 INFO L130 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2020-10-16 05:56:44,008 INFO L80 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 362 events. 87/362 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1701 event pairs, 34 based on Foata normal form. 1/332 useless extension candidates. Maximal degree in co-relation 886. Up to 206 conditions per place. [2020-10-16 05:56:44,010 INFO L132 encePairwiseOnDemand]: 155/158 looper letters, 13 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2020-10-16 05:56:44,011 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 233 flow [2020-10-16 05:56:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:56:44,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:56:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 486 transitions. [2020-10-16 05:56:44,013 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6151898734177215 [2020-10-16 05:56:44,013 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 486 transitions. [2020-10-16 05:56:44,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 486 transitions. [2020-10-16 05:56:44,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:44,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 486 transitions. [2020-10-16 05:56:44,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:56:44,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:56:44,017 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:56:44,017 INFO L185 Difference]: Start difference. First operand has 51 places, 41 transitions, 187 flow. Second operand 5 states and 486 transitions. [2020-10-16 05:56:44,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 233 flow [2020-10-16 05:56:44,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 227 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 05:56:44,020 INFO L241 Difference]: Finished difference. Result has 54 places, 42 transitions, 201 flow [2020-10-16 05:56:44,020 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2020-10-16 05:56:44,020 INFO L342 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2020-10-16 05:56:44,021 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 201 flow [2020-10-16 05:56:44,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 05:56:44,021 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:44,021 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:44,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 05:56:44,235 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:44,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:44,235 INFO L82 PathProgramCache]: Analyzing trace with hash 99472464, now seen corresponding path program 1 times [2020-10-16 05:56:44,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:44,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263437137] [2020-10-16 05:56:44,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:44,249 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:44,259 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:44,267 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:44,267 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:44,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-16 05:56:44,268 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:44,268 WARN L371 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:44,269 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2020-10-16 05:56:44,277 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,277 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,278 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,278 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,278 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,278 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,278 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,278 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,278 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,279 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,279 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,279 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,279 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,279 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,279 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,279 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,280 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,280 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,280 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,280 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,280 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,280 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,280 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,281 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,281 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,281 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,281 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,281 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,281 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,281 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,282 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,282 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,282 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,282 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,282 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,282 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,282 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,283 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,283 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,283 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,283 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,283 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,283 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,284 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,284 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,284 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,284 WARN L313 ript$VariableManager]: TermVariabe thrThread1of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,285 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,285 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,286 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,286 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,286 WARN L313 ript$VariableManager]: TermVariabe thrThread2of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,287 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,287 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,287 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,287 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,287 WARN L313 ript$VariableManager]: TermVariabe thrThread3of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,288 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,289 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,289 WARN L313 ript$VariableManager]: TermVariabe thrThread4of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,289 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,289 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,290 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,290 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,290 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,290 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,291 WARN L313 ript$VariableManager]: TermVariabe thrThread5of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,292 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,292 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,292 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,292 WARN L313 ript$VariableManager]: TermVariabe thrThread6of6ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,292 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of6ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:44,296 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:44,297 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:44,297 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:44,297 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:44,297 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:44,297 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:44,297 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:44,298 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:44,298 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:44,299 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 107 places, 106 transitions, 290 flow [2020-10-16 05:56:44,560 INFO L129 PetriNetUnfolder]: 399/2291 cut-off events. [2020-10-16 05:56:44,560 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-16 05:56:44,568 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 16193 event pairs, 72 based on Foata normal form. 0/1892 useless extension candidates. Maximal degree in co-relation 1271. Up to 192 conditions per place. [2020-10-16 05:56:44,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 106 transitions, 290 flow [2020-10-16 05:56:44,577 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 99 transitions, 276 flow [2020-10-16 05:56:44,577 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:44,577 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 99 transitions, 276 flow [2020-10-16 05:56:44,577 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 99 transitions, 276 flow [2020-10-16 05:56:44,577 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 101 places, 99 transitions, 276 flow [2020-10-16 05:56:44,749 INFO L129 PetriNetUnfolder]: 335/1843 cut-off events. [2020-10-16 05:56:44,750 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-16 05:56:44,757 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 1843 events. 335/1843 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 12005 event pairs, 72 based on Foata normal form. 0/1572 useless extension candidates. Maximal degree in co-relation 1047. Up to 192 conditions per place. [2020-10-16 05:56:44,795 INFO L117 LiptonReduction]: Number of co-enabled transitions 3240 [2020-10-16 05:56:46,197 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-16 05:56:46,436 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-16 05:56:46,572 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 05:56:46,585 INFO L132 LiptonReduction]: Checked pairs total: 11418 [2020-10-16 05:56:46,586 INFO L134 LiptonReduction]: Total number of compositions: 62 [2020-10-16 05:56:46,586 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2009 [2020-10-16 05:56:46,587 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 05:56:46,588 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:46,588 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:46,588 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:46,588 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:46,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:46,588 INFO L82 PathProgramCache]: Analyzing trace with hash 32517232, now seen corresponding path program 1 times [2020-10-16 05:56:46,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:46,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583450103] [2020-10-16 05:56:46,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:46,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583450103] [2020-10-16 05:56:46,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:46,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:46,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955531314] [2020-10-16 05:56:46,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:46,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:46,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:46,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:46,619 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 05:56:46,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 162 flow. Second operand 3 states. [2020-10-16 05:56:46,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:46,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 05:56:46,620 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:46,702 INFO L129 PetriNetUnfolder]: 198/625 cut-off events. [2020-10-16 05:56:46,703 INFO L130 PetriNetUnfolder]: For 242/242 co-relation queries the response was YES. [2020-10-16 05:56:46,705 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 625 events. 198/625 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2984 event pairs, 72 based on Foata normal form. 0/491 useless extension candidates. Maximal degree in co-relation 603. Up to 338 conditions per place. [2020-10-16 05:56:46,709 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 9 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2020-10-16 05:56:46,709 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 44 transitions, 188 flow [2020-10-16 05:56:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:46,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:46,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2020-10-16 05:56:46,711 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2020-10-16 05:56:46,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2020-10-16 05:56:46,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2020-10-16 05:56:46,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:46,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2020-10-16 05:56:46,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:46,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:46,714 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:46,714 INFO L185 Difference]: Start difference. First operand has 48 places, 42 transitions, 162 flow. Second operand 3 states and 321 transitions. [2020-10-16 05:56:46,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 44 transitions, 188 flow [2020-10-16 05:56:46,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 188 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:46,720 INFO L241 Difference]: Finished difference. Result has 51 places, 43 transitions, 174 flow [2020-10-16 05:56:46,720 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2020-10-16 05:56:46,720 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2020-10-16 05:56:46,720 INFO L481 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 174 flow [2020-10-16 05:56:46,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:46,721 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:46,721 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:46,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-16 05:56:46,721 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:46,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:46,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1901913869, now seen corresponding path program 1 times [2020-10-16 05:56:46,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:46,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426414797] [2020-10-16 05:56:46,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:46,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426414797] [2020-10-16 05:56:46,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:46,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:46,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030429750] [2020-10-16 05:56:46,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:46,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:46,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:46,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:46,759 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 05:56:46,759 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 174 flow. Second operand 4 states. [2020-10-16 05:56:46,759 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:46,759 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 05:56:46,760 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:46,854 INFO L129 PetriNetUnfolder]: 207/735 cut-off events. [2020-10-16 05:56:46,854 INFO L130 PetriNetUnfolder]: For 263/263 co-relation queries the response was YES. [2020-10-16 05:56:46,857 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1418 conditions, 735 events. 207/735 cut-off events. For 263/263 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3946 event pairs, 87 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 1395. Up to 342 conditions per place. [2020-10-16 05:56:46,861 INFO L132 encePairwiseOnDemand]: 161/168 looper letters, 8 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2020-10-16 05:56:46,861 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 47 transitions, 210 flow [2020-10-16 05:56:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:46,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:46,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 428 transitions. [2020-10-16 05:56:46,863 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2020-10-16 05:56:46,863 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 428 transitions. [2020-10-16 05:56:46,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 428 transitions. [2020-10-16 05:56:46,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:46,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 428 transitions. [2020-10-16 05:56:46,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:46,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:46,866 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:46,866 INFO L185 Difference]: Start difference. First operand has 51 places, 43 transitions, 174 flow. Second operand 4 states and 428 transitions. [2020-10-16 05:56:46,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 47 transitions, 210 flow [2020-10-16 05:56:46,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:46,869 INFO L241 Difference]: Finished difference. Result has 54 places, 45 transitions, 200 flow [2020-10-16 05:56:46,869 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2020-10-16 05:56:46,869 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 6 predicate places. [2020-10-16 05:56:46,869 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 200 flow [2020-10-16 05:56:46,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:46,870 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:46,870 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:46,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-16 05:56:46,870 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:46,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:46,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1796489895, now seen corresponding path program 1 times [2020-10-16 05:56:46,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:46,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547667415] [2020-10-16 05:56:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:46,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547667415] [2020-10-16 05:56:46,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112672297] [2020-10-16 05:56:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:46,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:56:46,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:47,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:47,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 05:56:47,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705757521] [2020-10-16 05:56:47,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:56:47,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:47,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:56:47,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:56:47,015 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 05:56:47,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 200 flow. Second operand 6 states. [2020-10-16 05:56:47,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:47,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 05:56:47,016 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:47,129 INFO L129 PetriNetUnfolder]: 206/730 cut-off events. [2020-10-16 05:56:47,129 INFO L130 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2020-10-16 05:56:47,132 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1828 conditions, 730 events. 206/730 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3954 event pairs, 87 based on Foata normal form. 1/668 useless extension candidates. Maximal degree in co-relation 944. Up to 413 conditions per place. [2020-10-16 05:56:47,137 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 12 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2020-10-16 05:56:47,137 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 48 transitions, 238 flow [2020-10-16 05:56:47,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:47,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 426 transitions. [2020-10-16 05:56:47,139 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2020-10-16 05:56:47,139 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 426 transitions. [2020-10-16 05:56:47,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 426 transitions. [2020-10-16 05:56:47,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:47,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 426 transitions. [2020-10-16 05:56:47,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:47,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:47,143 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:47,143 INFO L185 Difference]: Start difference. First operand has 54 places, 45 transitions, 200 flow. Second operand 4 states and 426 transitions. [2020-10-16 05:56:47,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 48 transitions, 238 flow [2020-10-16 05:56:47,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 48 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:47,146 INFO L241 Difference]: Finished difference. Result has 57 places, 46 transitions, 215 flow [2020-10-16 05:56:47,146 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2020-10-16 05:56:47,146 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 9 predicate places. [2020-10-16 05:56:47,146 INFO L481 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 215 flow [2020-10-16 05:56:47,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:56:47,147 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:47,147 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:47,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:47,361 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:47,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1936900963, now seen corresponding path program 1 times [2020-10-16 05:56:47,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:47,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135604861] [2020-10-16 05:56:47,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:47,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135604861] [2020-10-16 05:56:47,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648520474] [2020-10-16 05:56:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:47,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 05:56:47,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:47,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:47,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 05:56:47,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78238443] [2020-10-16 05:56:47,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 05:56:47,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:47,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 05:56:47,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 05:56:47,523 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 05:56:47,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 215 flow. Second operand 8 states. [2020-10-16 05:56:47,524 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:47,524 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 05:56:47,524 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:47,675 INFO L129 PetriNetUnfolder]: 204/722 cut-off events. [2020-10-16 05:56:47,676 INFO L130 PetriNetUnfolder]: For 359/359 co-relation queries the response was YES. [2020-10-16 05:56:47,678 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1821 conditions, 722 events. 204/722 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 3975 event pairs, 88 based on Foata normal form. 1/660 useless extension candidates. Maximal degree in co-relation 1780. Up to 407 conditions per place. [2020-10-16 05:56:47,682 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 13 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2020-10-16 05:56:47,683 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 261 flow [2020-10-16 05:56:47,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:56:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:56:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 531 transitions. [2020-10-16 05:56:47,685 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2020-10-16 05:56:47,685 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 531 transitions. [2020-10-16 05:56:47,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 531 transitions. [2020-10-16 05:56:47,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:47,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 531 transitions. [2020-10-16 05:56:47,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:56:47,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:56:47,689 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:56:47,689 INFO L185 Difference]: Start difference. First operand has 57 places, 46 transitions, 215 flow. Second operand 5 states and 531 transitions. [2020-10-16 05:56:47,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 261 flow [2020-10-16 05:56:47,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 255 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 05:56:47,693 INFO L241 Difference]: Finished difference. Result has 60 places, 47 transitions, 229 flow [2020-10-16 05:56:47,694 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=60, PETRI_TRANSITIONS=47} [2020-10-16 05:56:47,694 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 12 predicate places. [2020-10-16 05:56:47,695 INFO L481 AbstractCegarLoop]: Abstraction has has 60 places, 47 transitions, 229 flow [2020-10-16 05:56:47,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 05:56:47,695 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:47,695 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:47,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 05:56:47,909 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:47,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:47,910 INFO L82 PathProgramCache]: Analyzing trace with hash 348671934, now seen corresponding path program 1 times [2020-10-16 05:56:47,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:47,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748209516] [2020-10-16 05:56:47,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:47,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748209516] [2020-10-16 05:56:47,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683529461] [2020-10-16 05:56:47,952 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 [2020-10-16 05:56:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:48,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 05:56:48,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:48,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:48,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:48,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 05:56:48,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643873269] [2020-10-16 05:56:48,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 05:56:48,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:48,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 05:56:48,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 05:56:48,077 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 168 [2020-10-16 05:56:48,077 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 47 transitions, 229 flow. Second operand 10 states. [2020-10-16 05:56:48,078 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:48,078 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 168 [2020-10-16 05:56:48,078 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:48,194 INFO L129 PetriNetUnfolder]: 201/711 cut-off events. [2020-10-16 05:56:48,194 INFO L130 PetriNetUnfolder]: For 367/367 co-relation queries the response was YES. [2020-10-16 05:56:48,197 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1802 conditions, 711 events. 201/711 cut-off events. For 367/367 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4003 event pairs, 92 based on Foata normal form. 1/649 useless extension candidates. Maximal degree in co-relation 1746. Up to 400 conditions per place. [2020-10-16 05:56:48,201 INFO L132 encePairwiseOnDemand]: 165/168 looper letters, 14 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2020-10-16 05:56:48,202 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 52 transitions, 283 flow [2020-10-16 05:56:48,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 05:56:48,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 05:56:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 636 transitions. [2020-10-16 05:56:48,204 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2020-10-16 05:56:48,205 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 636 transitions. [2020-10-16 05:56:48,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 636 transitions. [2020-10-16 05:56:48,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:48,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 636 transitions. [2020-10-16 05:56:48,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 05:56:48,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 05:56:48,209 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 05:56:48,209 INFO L185 Difference]: Start difference. First operand has 60 places, 47 transitions, 229 flow. Second operand 6 states and 636 transitions. [2020-10-16 05:56:48,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 52 transitions, 283 flow [2020-10-16 05:56:48,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 52 transitions, 273 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 05:56:48,212 INFO L241 Difference]: Finished difference. Result has 63 places, 48 transitions, 243 flow [2020-10-16 05:56:48,212 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2020-10-16 05:56:48,212 INFO L342 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2020-10-16 05:56:48,213 INFO L481 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 243 flow [2020-10-16 05:56:48,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 05:56:48,213 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:48,213 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:48,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:48,427 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:48,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:48,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1736436190, now seen corresponding path program 1 times [2020-10-16 05:56:48,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:48,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483369005] [2020-10-16 05:56:48,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:48,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:48,444 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:48,453 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:48,461 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:48,461 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:48,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-16 05:56:48,462 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:48,463 WARN L371 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:48,463 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2020-10-16 05:56:48,473 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,473 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,473 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,473 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,474 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,474 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,474 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,474 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,474 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,474 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,474 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,475 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,475 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,475 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,475 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,475 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,475 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,475 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,476 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,476 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,476 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,476 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,476 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,476 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,476 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,477 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,477 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,477 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,477 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,477 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,477 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,477 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,477 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,478 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,478 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,478 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,478 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,478 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,478 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,478 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,479 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,479 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,479 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,479 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,479 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,479 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,480 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,480 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,480 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,480 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,480 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,481 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,481 WARN L313 ript$VariableManager]: TermVariabe thrThread1of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,481 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,482 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,482 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,483 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,483 WARN L313 ript$VariableManager]: TermVariabe thrThread2of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,483 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,484 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,484 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,484 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,484 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,484 WARN L313 ript$VariableManager]: TermVariabe thrThread3of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,485 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,485 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,485 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,486 WARN L313 ript$VariableManager]: TermVariabe thrThread4of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,486 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,487 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,487 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,487 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,487 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,487 WARN L313 ript$VariableManager]: TermVariabe thrThread5of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,488 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,488 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,488 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,489 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,489 WARN L313 ript$VariableManager]: TermVariabe thrThread6of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,490 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,490 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,490 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of7ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,490 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,490 WARN L313 ript$VariableManager]: TermVariabe thrThread7of7ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:48,495 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:48,495 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:48,495 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:48,495 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:48,495 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:48,496 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:48,496 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:48,496 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:48,496 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:48,497 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 115 places, 113 transitions, 324 flow [2020-10-16 05:56:48,917 INFO L129 PetriNetUnfolder]: 849/4546 cut-off events. [2020-10-16 05:56:48,917 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-16 05:56:48,935 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 38654 event pairs, 201 based on Foata normal form. 0/3761 useless extension candidates. Maximal degree in co-relation 2509. Up to 448 conditions per place. [2020-10-16 05:56:48,935 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 113 transitions, 324 flow [2020-10-16 05:56:48,953 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 106 transitions, 310 flow [2020-10-16 05:56:48,953 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:48,953 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 106 transitions, 310 flow [2020-10-16 05:56:48,953 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 106 transitions, 310 flow [2020-10-16 05:56:48,953 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 109 places, 106 transitions, 310 flow [2020-10-16 05:56:49,265 INFO L129 PetriNetUnfolder]: 721/3650 cut-off events. [2020-10-16 05:56:49,266 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-16 05:56:49,285 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4148 conditions, 3650 events. 721/3650 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 29207 event pairs, 201 based on Foata normal form. 0/3121 useless extension candidates. Maximal degree in co-relation 2061. Up to 448 conditions per place. [2020-10-16 05:56:49,355 INFO L117 LiptonReduction]: Number of co-enabled transitions 4060 [2020-10-16 05:56:50,650 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-10-16 05:56:50,928 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 05:56:51,008 INFO L132 LiptonReduction]: Checked pairs total: 18122 [2020-10-16 05:56:51,008 INFO L134 LiptonReduction]: Total number of compositions: 65 [2020-10-16 05:56:51,008 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2055 [2020-10-16 05:56:51,009 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 05:56:51,009 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:51,010 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:51,010 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:51,010 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:51,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:51,010 INFO L82 PathProgramCache]: Analyzing trace with hash 38211156, now seen corresponding path program 1 times [2020-10-16 05:56:51,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:51,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318856545] [2020-10-16 05:56:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:51,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318856545] [2020-10-16 05:56:51,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:51,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:51,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193848989] [2020-10-16 05:56:51,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:51,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:51,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:51,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:51,029 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 05:56:51,030 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 192 flow. Second operand 3 states. [2020-10-16 05:56:51,030 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:51,030 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 05:56:51,030 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:51,208 INFO L129 PetriNetUnfolder]: 455/1273 cut-off events. [2020-10-16 05:56:51,208 INFO L130 PetriNetUnfolder]: For 525/525 co-relation queries the response was YES. [2020-10-16 05:56:51,214 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2434 conditions, 1273 events. 455/1273 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7235 event pairs, 201 based on Foata normal form. 0/1010 useless extension candidates. Maximal degree in co-relation 1199. Up to 661 conditions per place. [2020-10-16 05:56:51,223 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 9 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2020-10-16 05:56:51,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 218 flow [2020-10-16 05:56:51,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:51,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2020-10-16 05:56:51,226 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6573033707865169 [2020-10-16 05:56:51,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2020-10-16 05:56:51,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2020-10-16 05:56:51,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:51,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2020-10-16 05:56:51,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:51,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:51,230 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:51,230 INFO L185 Difference]: Start difference. First operand has 54 places, 47 transitions, 192 flow. Second operand 3 states and 351 transitions. [2020-10-16 05:56:51,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 218 flow [2020-10-16 05:56:51,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 49 transitions, 218 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:51,233 INFO L241 Difference]: Finished difference. Result has 57 places, 48 transitions, 204 flow [2020-10-16 05:56:51,233 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2020-10-16 05:56:51,233 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 3 predicate places. [2020-10-16 05:56:51,233 INFO L481 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 204 flow [2020-10-16 05:56:51,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:51,234 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:51,234 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:51,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-16 05:56:51,234 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:51,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:51,234 INFO L82 PathProgramCache]: Analyzing trace with hash 939052157, now seen corresponding path program 1 times [2020-10-16 05:56:51,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:51,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433801586] [2020-10-16 05:56:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:51,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433801586] [2020-10-16 05:56:51,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:51,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:51,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112844253] [2020-10-16 05:56:51,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:51,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:51,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:51,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:51,274 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 05:56:51,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 204 flow. Second operand 4 states. [2020-10-16 05:56:51,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:51,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 05:56:51,275 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:51,451 INFO L129 PetriNetUnfolder]: 469/1466 cut-off events. [2020-10-16 05:56:51,451 INFO L130 PetriNetUnfolder]: For 553/553 co-relation queries the response was YES. [2020-10-16 05:56:51,458 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2817 conditions, 1466 events. 469/1466 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9098 event pairs, 222 based on Foata normal form. 0/1212 useless extension candidates. Maximal degree in co-relation 2793. Up to 670 conditions per place. [2020-10-16 05:56:51,464 INFO L132 encePairwiseOnDemand]: 171/178 looper letters, 8 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2020-10-16 05:56:51,465 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 240 flow [2020-10-16 05:56:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:51,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:51,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2020-10-16 05:56:51,467 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6573033707865169 [2020-10-16 05:56:51,467 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 468 transitions. [2020-10-16 05:56:51,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 468 transitions. [2020-10-16 05:56:51,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:51,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 468 transitions. [2020-10-16 05:56:51,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:51,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:51,470 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:51,470 INFO L185 Difference]: Start difference. First operand has 57 places, 48 transitions, 204 flow. Second operand 4 states and 468 transitions. [2020-10-16 05:56:51,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 240 flow [2020-10-16 05:56:51,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:51,474 INFO L241 Difference]: Finished difference. Result has 60 places, 50 transitions, 230 flow [2020-10-16 05:56:51,474 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=230, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2020-10-16 05:56:51,474 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 6 predicate places. [2020-10-16 05:56:51,474 INFO L481 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 230 flow [2020-10-16 05:56:51,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:51,474 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:51,474 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:51,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-16 05:56:51,475 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:51,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:51,475 INFO L82 PathProgramCache]: Analyzing trace with hash 314298890, now seen corresponding path program 1 times [2020-10-16 05:56:51,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:51,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319052362] [2020-10-16 05:56:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:51,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319052362] [2020-10-16 05:56:51,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341597368] [2020-10-16 05:56:51,516 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 [2020-10-16 05:56:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:51,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:56:51,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:51,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:51,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 05:56:51,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338172111] [2020-10-16 05:56:51,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:56:51,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:51,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:56:51,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:56:51,613 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 05:56:51,613 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 230 flow. Second operand 6 states. [2020-10-16 05:56:51,613 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:51,613 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 05:56:51,613 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:51,756 INFO L129 PetriNetUnfolder]: 468/1461 cut-off events. [2020-10-16 05:56:51,756 INFO L130 PetriNetUnfolder]: For 707/707 co-relation queries the response was YES. [2020-10-16 05:56:51,762 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3625 conditions, 1461 events. 468/1461 cut-off events. For 707/707 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9105 event pairs, 222 based on Foata normal form. 1/1335 useless extension candidates. Maximal degree in co-relation 1837. Up to 807 conditions per place. [2020-10-16 05:56:51,769 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 12 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2020-10-16 05:56:51,769 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 53 transitions, 268 flow [2020-10-16 05:56:51,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2020-10-16 05:56:51,771 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6544943820224719 [2020-10-16 05:56:51,772 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2020-10-16 05:56:51,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2020-10-16 05:56:51,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:51,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2020-10-16 05:56:51,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:51,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:51,775 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:51,775 INFO L185 Difference]: Start difference. First operand has 60 places, 50 transitions, 230 flow. Second operand 4 states and 466 transitions. [2020-10-16 05:56:51,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 53 transitions, 268 flow [2020-10-16 05:56:51,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 267 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:51,779 INFO L241 Difference]: Finished difference. Result has 63 places, 51 transitions, 245 flow [2020-10-16 05:56:51,779 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2020-10-16 05:56:51,779 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 9 predicate places. [2020-10-16 05:56:51,779 INFO L481 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 245 flow [2020-10-16 05:56:51,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:56:51,779 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:51,779 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:51,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 05:56:51,995 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:51,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:51,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1701157806, now seen corresponding path program 1 times [2020-10-16 05:56:51,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:51,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983156701] [2020-10-16 05:56:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:52,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983156701] [2020-10-16 05:56:52,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412470372] [2020-10-16 05:56:52,028 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 [2020-10-16 05:56:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:52,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 05:56:52,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:52,115 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:52,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:52,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 05:56:52,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361280697] [2020-10-16 05:56:52,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 05:56:52,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:52,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 05:56:52,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-16 05:56:52,118 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 05:56:52,119 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 245 flow. Second operand 8 states. [2020-10-16 05:56:52,119 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:52,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 05:56:52,120 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:52,435 INFO L129 PetriNetUnfolder]: 466/1453 cut-off events. [2020-10-16 05:56:52,435 INFO L130 PetriNetUnfolder]: For 722/722 co-relation queries the response was YES. [2020-10-16 05:56:52,444 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3620 conditions, 1453 events. 466/1453 cut-off events. For 722/722 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 9159 event pairs, 223 based on Foata normal form. 1/1327 useless extension candidates. Maximal degree in co-relation 3578. Up to 801 conditions per place. [2020-10-16 05:56:52,452 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 13 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2020-10-16 05:56:52,452 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 291 flow [2020-10-16 05:56:52,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:56:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:56:52,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 581 transitions. [2020-10-16 05:56:52,456 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6528089887640449 [2020-10-16 05:56:52,456 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 581 transitions. [2020-10-16 05:56:52,456 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 581 transitions. [2020-10-16 05:56:52,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:52,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 581 transitions. [2020-10-16 05:56:52,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:56:52,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:56:52,461 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:56:52,461 INFO L185 Difference]: Start difference. First operand has 63 places, 51 transitions, 245 flow. Second operand 5 states and 581 transitions. [2020-10-16 05:56:52,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 291 flow [2020-10-16 05:56:52,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 285 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 05:56:52,468 INFO L241 Difference]: Finished difference. Result has 66 places, 52 transitions, 259 flow [2020-10-16 05:56:52,468 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2020-10-16 05:56:52,468 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2020-10-16 05:56:52,469 INFO L481 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 259 flow [2020-10-16 05:56:52,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 05:56:52,469 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:52,469 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:52,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-16 05:56:52,683 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:52,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:52,684 INFO L82 PathProgramCache]: Analyzing trace with hash -223060935, now seen corresponding path program 1 times [2020-10-16 05:56:52,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:52,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109550125] [2020-10-16 05:56:52,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:52,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109550125] [2020-10-16 05:56:52,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634464399] [2020-10-16 05:56:52,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:52,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 05:56:52,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:52,908 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:52,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:52,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 05:56:52,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762276193] [2020-10-16 05:56:52,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 05:56:52,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:52,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 05:56:52,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-16 05:56:52,912 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 05:56:52,913 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 259 flow. Second operand 10 states. [2020-10-16 05:56:52,913 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:52,914 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 05:56:52,914 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:53,211 INFO L129 PetriNetUnfolder]: 463/1442 cut-off events. [2020-10-16 05:56:53,211 INFO L130 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2020-10-16 05:56:53,219 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3603 conditions, 1442 events. 463/1442 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 9230 event pairs, 227 based on Foata normal form. 1/1316 useless extension candidates. Maximal degree in co-relation 3546. Up to 794 conditions per place. [2020-10-16 05:56:53,225 INFO L132 encePairwiseOnDemand]: 175/178 looper letters, 14 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2020-10-16 05:56:53,226 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 57 transitions, 313 flow [2020-10-16 05:56:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 05:56:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 05:56:53,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 696 transitions. [2020-10-16 05:56:53,228 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.651685393258427 [2020-10-16 05:56:53,228 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 696 transitions. [2020-10-16 05:56:53,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 696 transitions. [2020-10-16 05:56:53,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:53,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 696 transitions. [2020-10-16 05:56:53,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 05:56:53,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 05:56:53,233 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 05:56:53,233 INFO L185 Difference]: Start difference. First operand has 66 places, 52 transitions, 259 flow. Second operand 6 states and 696 transitions. [2020-10-16 05:56:53,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 57 transitions, 313 flow [2020-10-16 05:56:53,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 303 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 05:56:53,239 INFO L241 Difference]: Finished difference. Result has 69 places, 53 transitions, 273 flow [2020-10-16 05:56:53,239 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2020-10-16 05:56:53,239 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2020-10-16 05:56:53,239 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 273 flow [2020-10-16 05:56:53,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 05:56:53,240 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:53,240 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:53,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 05:56:53,453 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:53,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:53,454 INFO L82 PathProgramCache]: Analyzing trace with hash 495964735, now seen corresponding path program 1 times [2020-10-16 05:56:53,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:53,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582662332] [2020-10-16 05:56:53,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:53,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:53,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582662332] [2020-10-16 05:56:53,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784296720] [2020-10-16 05:56:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:53,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 05:56:53,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:53,632 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:53,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:53,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 05:56:53,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115119727] [2020-10-16 05:56:53,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 05:56:53,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:53,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 05:56:53,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-10-16 05:56:53,635 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 178 [2020-10-16 05:56:53,636 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 273 flow. Second operand 12 states. [2020-10-16 05:56:53,636 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:53,636 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 178 [2020-10-16 05:56:53,636 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:53,811 INFO L129 PetriNetUnfolder]: 459/1428 cut-off events. [2020-10-16 05:56:53,811 INFO L130 PetriNetUnfolder]: For 740/740 co-relation queries the response was YES. [2020-10-16 05:56:53,815 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3575 conditions, 1428 events. 459/1428 cut-off events. For 740/740 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 9329 event pairs, 238 based on Foata normal form. 1/1302 useless extension candidates. Maximal degree in co-relation 3502. Up to 653 conditions per place. [2020-10-16 05:56:53,820 INFO L132 encePairwiseOnDemand]: 172/178 looper letters, 10 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2020-10-16 05:56:53,820 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 59 transitions, 335 flow [2020-10-16 05:56:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 05:56:53,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 05:56:53,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 924 transitions. [2020-10-16 05:56:53,824 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.648876404494382 [2020-10-16 05:56:53,824 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 924 transitions. [2020-10-16 05:56:53,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 924 transitions. [2020-10-16 05:56:53,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:53,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 924 transitions. [2020-10-16 05:56:53,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 05:56:53,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 05:56:53,829 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 05:56:53,829 INFO L185 Difference]: Start difference. First operand has 69 places, 53 transitions, 273 flow. Second operand 8 states and 924 transitions. [2020-10-16 05:56:53,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 59 transitions, 335 flow [2020-10-16 05:56:53,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 59 transitions, 321 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 05:56:53,834 INFO L241 Difference]: Finished difference. Result has 74 places, 55 transitions, 306 flow [2020-10-16 05:56:53,834 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=306, PETRI_PLACES=74, PETRI_TRANSITIONS=55} [2020-10-16 05:56:53,834 INFO L342 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2020-10-16 05:56:53,834 INFO L481 AbstractCegarLoop]: Abstraction has has 74 places, 55 transitions, 306 flow [2020-10-16 05:56:53,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 05:56:53,835 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:53,835 INFO L255 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:54,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 05:56:54,049 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:54,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:54,049 INFO L82 PathProgramCache]: Analyzing trace with hash 781378849, now seen corresponding path program 1 times [2020-10-16 05:56:54,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:54,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194936367] [2020-10-16 05:56:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:54,061 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:56:54,069 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:56:54,076 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:56:54,076 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:56:54,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-16 05:56:54,077 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:56:54,077 WARN L371 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:56:54,078 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2020-10-16 05:56:54,087 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,088 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,088 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,088 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,088 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,088 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,088 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,089 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,089 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,089 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,089 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,089 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,089 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,090 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,090 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,090 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,090 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,090 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,090 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,090 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,091 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,091 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,091 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,091 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,091 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,091 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,091 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,091 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,092 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,092 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,092 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,092 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,092 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,092 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,093 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,093 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,093 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,093 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,093 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,093 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,093 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,094 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,094 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,094 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,094 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,094 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,094 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,095 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,095 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,095 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,095 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,095 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,096 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,096 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,096 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,096 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,096 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,097 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,097 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,097 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,097 WARN L313 ript$VariableManager]: TermVariabe thrThread1of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,098 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,099 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,099 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,099 WARN L313 ript$VariableManager]: TermVariabe thrThread2of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,099 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,100 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,100 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,101 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,101 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,101 WARN L313 ript$VariableManager]: TermVariabe thrThread3of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,102 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,102 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,102 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,102 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,103 WARN L313 ript$VariableManager]: TermVariabe thrThread4of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,104 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,104 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,104 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,104 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,104 WARN L313 ript$VariableManager]: TermVariabe thrThread5of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,105 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,105 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,106 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,106 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,106 WARN L313 ript$VariableManager]: TermVariabe thrThread6of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,107 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,107 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,107 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,108 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,108 WARN L313 ript$VariableManager]: TermVariabe thrThread7of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,109 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,109 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,109 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,109 WARN L313 ript$VariableManager]: TermVariabe thrThread8of8ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,109 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of8ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:56:54,114 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:56:54,115 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:56:54,115 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:56:54,115 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:56:54,115 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:56:54,115 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:56:54,116 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:56:54,116 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:56:54,116 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:56:54,117 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 123 places, 120 transitions, 360 flow [2020-10-16 05:56:54,855 INFO L129 PetriNetUnfolder]: 1811/9105 cut-off events. [2020-10-16 05:56:54,855 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-16 05:56:54,898 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10190 conditions, 9105 events. 1811/9105 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 89225 event pairs, 522 based on Foata normal form. 0/7550 useless extension candidates. Maximal degree in co-relation 5028. Up to 1024 conditions per place. [2020-10-16 05:56:54,898 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 120 transitions, 360 flow [2020-10-16 05:56:54,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 113 transitions, 346 flow [2020-10-16 05:56:54,926 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:56:54,926 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 113 transitions, 346 flow [2020-10-16 05:56:54,926 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 113 transitions, 346 flow [2020-10-16 05:56:54,927 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 117 places, 113 transitions, 346 flow [2020-10-16 05:56:55,513 INFO L129 PetriNetUnfolder]: 1555/7313 cut-off events. [2020-10-16 05:56:55,513 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-16 05:56:55,546 INFO L80 FinitePrefix]: Finished finitePrefix Result has 8398 conditions, 7313 events. 1555/7313 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 67995 event pairs, 522 based on Foata normal form. 0/6270 useless extension candidates. Maximal degree in co-relation 4132. Up to 1024 conditions per place. [2020-10-16 05:56:55,654 INFO L117 LiptonReduction]: Number of co-enabled transitions 4960 [2020-10-16 05:56:57,335 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-16 05:56:57,415 INFO L132 LiptonReduction]: Checked pairs total: 20069 [2020-10-16 05:56:57,416 INFO L134 LiptonReduction]: Total number of compositions: 66 [2020-10-16 05:56:57,416 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 2490 [2020-10-16 05:56:57,417 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 05:56:57,417 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:56:57,417 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:57,417 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:56:57,418 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:57,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:57,418 INFO L82 PathProgramCache]: Analyzing trace with hash 44152403, now seen corresponding path program 1 times [2020-10-16 05:56:57,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:57,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901294363] [2020-10-16 05:56:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:56:57,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901294363] [2020-10-16 05:56:57,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:57,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:56:57,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263379332] [2020-10-16 05:56:57,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:56:57,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:57,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:56:57,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:56:57,441 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 05:56:57,442 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 52 transitions, 224 flow. Second operand 3 states. [2020-10-16 05:56:57,442 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:57,442 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 05:56:57,442 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:57,669 INFO L129 PetriNetUnfolder]: 1032/2625 cut-off events. [2020-10-16 05:56:57,669 INFO L130 PetriNetUnfolder]: For 1136/1136 co-relation queries the response was YES. [2020-10-16 05:56:57,677 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5016 conditions, 2625 events. 1032/2625 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 17012 event pairs, 522 based on Foata normal form. 0/2105 useless extension candidates. Maximal degree in co-relation 2436. Up to 1304 conditions per place. [2020-10-16 05:56:57,691 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 9 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2020-10-16 05:56:57,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 250 flow [2020-10-16 05:56:57,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:56:57,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:56:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2020-10-16 05:56:57,693 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2020-10-16 05:56:57,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 372 transitions. [2020-10-16 05:56:57,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 372 transitions. [2020-10-16 05:56:57,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:57,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 372 transitions. [2020-10-16 05:56:57,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:56:57,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:56:57,696 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:56:57,696 INFO L185 Difference]: Start difference. First operand has 60 places, 52 transitions, 224 flow. Second operand 3 states and 372 transitions. [2020-10-16 05:56:57,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 250 flow [2020-10-16 05:56:57,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 54 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:56:57,700 INFO L241 Difference]: Finished difference. Result has 63 places, 53 transitions, 236 flow [2020-10-16 05:56:57,701 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=63, PETRI_TRANSITIONS=53} [2020-10-16 05:56:57,701 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 3 predicate places. [2020-10-16 05:56:57,701 INFO L481 AbstractCegarLoop]: Abstraction has has 63 places, 53 transitions, 236 flow [2020-10-16 05:56:57,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:56:57,701 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:57,701 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:57,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-16 05:56:57,702 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:57,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:57,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1362338127, now seen corresponding path program 1 times [2020-10-16 05:56:57,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:57,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729671654] [2020-10-16 05:56:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:56:57,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729671654] [2020-10-16 05:56:57,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:56:57,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:56:57,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315897916] [2020-10-16 05:56:57,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:56:57,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:56:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:56:57,723 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 05:56:57,724 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 53 transitions, 236 flow. Second operand 4 states. [2020-10-16 05:56:57,724 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:57,724 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 05:56:57,724 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:58,018 INFO L129 PetriNetUnfolder]: 1052/2968 cut-off events. [2020-10-16 05:56:58,018 INFO L130 PetriNetUnfolder]: For 1172/1172 co-relation queries the response was YES. [2020-10-16 05:56:58,075 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5694 conditions, 2968 events. 1052/2968 cut-off events. For 1172/1172 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20909 event pairs, 550 based on Foata normal form. 0/2458 useless extension candidates. Maximal degree in co-relation 5669. Up to 1319 conditions per place. [2020-10-16 05:56:58,082 INFO L132 encePairwiseOnDemand]: 179/186 looper letters, 8 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2020-10-16 05:56:58,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 272 flow [2020-10-16 05:56:58,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 496 transitions. [2020-10-16 05:56:58,084 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2020-10-16 05:56:58,084 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 496 transitions. [2020-10-16 05:56:58,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 496 transitions. [2020-10-16 05:56:58,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:58,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 496 transitions. [2020-10-16 05:56:58,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:58,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:58,088 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:58,088 INFO L185 Difference]: Start difference. First operand has 63 places, 53 transitions, 236 flow. Second operand 4 states and 496 transitions. [2020-10-16 05:56:58,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 272 flow [2020-10-16 05:56:58,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 57 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:58,091 INFO L241 Difference]: Finished difference. Result has 66 places, 55 transitions, 262 flow [2020-10-16 05:56:58,091 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2020-10-16 05:56:58,091 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2020-10-16 05:56:58,091 INFO L481 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 262 flow [2020-10-16 05:56:58,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:56:58,092 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:58,092 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:58,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-16 05:56:58,092 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:58,092 INFO L82 PathProgramCache]: Analyzing trace with hash -355906383, now seen corresponding path program 1 times [2020-10-16 05:56:58,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:58,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962079915] [2020-10-16 05:56:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:58,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962079915] [2020-10-16 05:56:58,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340514813] [2020-10-16 05:56:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:58,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:56:58,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:58,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:58,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 05:56:58,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74141879] [2020-10-16 05:56:58,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:56:58,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:58,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:56:58,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:56:58,216 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 05:56:58,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 262 flow. Second operand 6 states. [2020-10-16 05:56:58,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:58,217 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 05:56:58,217 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:58,472 INFO L129 PetriNetUnfolder]: 1051/2963 cut-off events. [2020-10-16 05:56:58,472 INFO L130 PetriNetUnfolder]: For 1462/1462 co-relation queries the response was YES. [2020-10-16 05:56:58,483 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7286 conditions, 2963 events. 1051/2963 cut-off events. For 1462/1462 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20845 event pairs, 550 based on Foata normal form. 1/2709 useless extension candidates. Maximal degree in co-relation 3660. Up to 1586 conditions per place. [2020-10-16 05:56:58,492 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 12 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2020-10-16 05:56:58,492 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 300 flow [2020-10-16 05:56:58,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:56:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:56:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 494 transitions. [2020-10-16 05:56:58,493 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6639784946236559 [2020-10-16 05:56:58,493 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 494 transitions. [2020-10-16 05:56:58,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 494 transitions. [2020-10-16 05:56:58,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:58,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 494 transitions. [2020-10-16 05:56:58,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:56:58,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:56:58,496 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:56:58,496 INFO L185 Difference]: Start difference. First operand has 66 places, 55 transitions, 262 flow. Second operand 4 states and 494 transitions. [2020-10-16 05:56:58,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 300 flow [2020-10-16 05:56:58,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 58 transitions, 299 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:56:58,501 INFO L241 Difference]: Finished difference. Result has 69 places, 56 transitions, 277 flow [2020-10-16 05:56:58,501 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=277, PETRI_PLACES=69, PETRI_TRANSITIONS=56} [2020-10-16 05:56:58,501 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 9 predicate places. [2020-10-16 05:56:58,501 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 56 transitions, 277 flow [2020-10-16 05:56:58,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:56:58,501 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:58,501 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:58,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-16 05:56:58,716 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:58,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1453614924, now seen corresponding path program 1 times [2020-10-16 05:56:58,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:58,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140183625] [2020-10-16 05:56:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:58,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140183625] [2020-10-16 05:56:58,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182520560] [2020-10-16 05:56:58,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:58,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 05:56:58,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:58,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:58,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 05:56:58,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494642541] [2020-10-16 05:56:58,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 05:56:58,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:58,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 05:56:58,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 05:56:58,854 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 05:56:58,855 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 56 transitions, 277 flow. Second operand 8 states. [2020-10-16 05:56:58,856 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:58,856 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 05:56:58,856 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:59,164 INFO L129 PetriNetUnfolder]: 1049/2955 cut-off events. [2020-10-16 05:56:59,165 INFO L130 PetriNetUnfolder]: For 1479/1479 co-relation queries the response was YES. [2020-10-16 05:56:59,181 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7283 conditions, 2955 events. 1049/2955 cut-off events. For 1479/1479 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20949 event pairs, 551 based on Foata normal form. 1/2701 useless extension candidates. Maximal degree in co-relation 7240. Up to 1580 conditions per place. [2020-10-16 05:56:59,193 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 13 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2020-10-16 05:56:59,194 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 60 transitions, 323 flow [2020-10-16 05:56:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:56:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:56:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 616 transitions. [2020-10-16 05:56:59,196 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6623655913978495 [2020-10-16 05:56:59,196 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 616 transitions. [2020-10-16 05:56:59,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 616 transitions. [2020-10-16 05:56:59,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:59,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 616 transitions. [2020-10-16 05:56:59,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:56:59,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:56:59,198 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:56:59,198 INFO L185 Difference]: Start difference. First operand has 69 places, 56 transitions, 277 flow. Second operand 5 states and 616 transitions. [2020-10-16 05:56:59,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 60 transitions, 323 flow [2020-10-16 05:56:59,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 60 transitions, 317 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 05:56:59,204 INFO L241 Difference]: Finished difference. Result has 72 places, 57 transitions, 291 flow [2020-10-16 05:56:59,205 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=291, PETRI_PLACES=72, PETRI_TRANSITIONS=57} [2020-10-16 05:56:59,205 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 12 predicate places. [2020-10-16 05:56:59,205 INFO L481 AbstractCegarLoop]: Abstraction has has 72 places, 57 transitions, 291 flow [2020-10-16 05:56:59,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 05:56:59,205 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:59,205 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:56:59,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:59,418 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:56:59,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:56:59,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1245149690, now seen corresponding path program 1 times [2020-10-16 05:56:59,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:56:59,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967766625] [2020-10-16 05:56:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:56:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:59,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967766625] [2020-10-16 05:56:59,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720055128] [2020-10-16 05:56:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:56:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:56:59,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 05:56:59,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:56:59,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:56:59,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:56:59,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 05:56:59,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726904985] [2020-10-16 05:56:59,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 05:56:59,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:56:59,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 05:56:59,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 05:56:59,654 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 05:56:59,655 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 57 transitions, 291 flow. Second operand 10 states. [2020-10-16 05:56:59,655 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:56:59,655 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 05:56:59,655 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:56:59,924 INFO L129 PetriNetUnfolder]: 1046/2944 cut-off events. [2020-10-16 05:56:59,924 INFO L130 PetriNetUnfolder]: For 1493/1493 co-relation queries the response was YES. [2020-10-16 05:56:59,935 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7268 conditions, 2944 events. 1046/2944 cut-off events. For 1493/1493 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 21011 event pairs, 555 based on Foata normal form. 1/2690 useless extension candidates. Maximal degree in co-relation 7210. Up to 1573 conditions per place. [2020-10-16 05:56:59,943 INFO L132 encePairwiseOnDemand]: 183/186 looper letters, 14 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2020-10-16 05:56:59,944 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 62 transitions, 345 flow [2020-10-16 05:56:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 05:56:59,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 05:56:59,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 738 transitions. [2020-10-16 05:56:59,945 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2020-10-16 05:56:59,945 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 738 transitions. [2020-10-16 05:56:59,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 738 transitions. [2020-10-16 05:56:59,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:56:59,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 738 transitions. [2020-10-16 05:56:59,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 05:56:59,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 05:56:59,948 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 05:56:59,949 INFO L185 Difference]: Start difference. First operand has 72 places, 57 transitions, 291 flow. Second operand 6 states and 738 transitions. [2020-10-16 05:56:59,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 62 transitions, 345 flow [2020-10-16 05:56:59,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 62 transitions, 335 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 05:56:59,954 INFO L241 Difference]: Finished difference. Result has 75 places, 58 transitions, 305 flow [2020-10-16 05:56:59,954 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=305, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2020-10-16 05:56:59,954 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 15 predicate places. [2020-10-16 05:56:59,954 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 305 flow [2020-10-16 05:56:59,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 05:56:59,955 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:56:59,955 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:00,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-16 05:57:00,169 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:00,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:00,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1295301725, now seen corresponding path program 1 times [2020-10-16 05:57:00,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:00,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777303085] [2020-10-16 05:57:00,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:00,216 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:00,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777303085] [2020-10-16 05:57:00,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157629132] [2020-10-16 05:57:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:00,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 05:57:00,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:00,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:00,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 05:57:00,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649412355] [2020-10-16 05:57:00,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 05:57:00,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:00,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 05:57:00,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 05:57:00,386 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 05:57:00,387 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 305 flow. Second operand 12 states. [2020-10-16 05:57:00,387 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:00,387 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 05:57:00,387 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:00,853 INFO L129 PetriNetUnfolder]: 1042/2930 cut-off events. [2020-10-16 05:57:00,853 INFO L130 PetriNetUnfolder]: For 1504/1504 co-relation queries the response was YES. [2020-10-16 05:57:00,872 INFO L80 FinitePrefix]: Finished finitePrefix Result has 7242 conditions, 2930 events. 1042/2930 cut-off events. For 1504/1504 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 21244 event pairs, 566 based on Foata normal form. 1/2676 useless extension candidates. Maximal degree in co-relation 7168. Up to 1302 conditions per place. [2020-10-16 05:57:00,886 INFO L132 encePairwiseOnDemand]: 180/186 looper letters, 10 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2020-10-16 05:57:00,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 64 transitions, 367 flow [2020-10-16 05:57:00,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 05:57:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 05:57:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 980 transitions. [2020-10-16 05:57:00,888 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6586021505376344 [2020-10-16 05:57:00,888 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 980 transitions. [2020-10-16 05:57:00,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 980 transitions. [2020-10-16 05:57:00,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:00,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 980 transitions. [2020-10-16 05:57:00,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 05:57:00,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 05:57:00,893 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 05:57:00,893 INFO L185 Difference]: Start difference. First operand has 75 places, 58 transitions, 305 flow. Second operand 8 states and 980 transitions. [2020-10-16 05:57:00,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 64 transitions, 367 flow [2020-10-16 05:57:00,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 64 transitions, 353 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 05:57:00,900 INFO L241 Difference]: Finished difference. Result has 80 places, 60 transitions, 338 flow [2020-10-16 05:57:00,900 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2020-10-16 05:57:00,900 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2020-10-16 05:57:00,900 INFO L481 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 338 flow [2020-10-16 05:57:00,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 05:57:00,900 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:00,901 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:01,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:01,113 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:01,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:01,114 INFO L82 PathProgramCache]: Analyzing trace with hash -703139369, now seen corresponding path program 1 times [2020-10-16 05:57:01,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:01,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393904159] [2020-10-16 05:57:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 05:57:01,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393904159] [2020-10-16 05:57:01,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853004236] [2020-10-16 05:57:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:01,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:01,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:57:01,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 05:57:01,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:01,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 05:57:01,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097255885] [2020-10-16 05:57:01,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 05:57:01,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:01,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 05:57:01,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-16 05:57:01,286 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 186 [2020-10-16 05:57:01,287 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 338 flow. Second operand 7 states. [2020-10-16 05:57:01,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:01,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 186 [2020-10-16 05:57:01,287 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:01,669 INFO L129 PetriNetUnfolder]: 1108/3347 cut-off events. [2020-10-16 05:57:01,669 INFO L130 PetriNetUnfolder]: For 3282/3282 co-relation queries the response was YES. [2020-10-16 05:57:01,683 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9178 conditions, 3347 events. 1108/3347 cut-off events. For 3282/3282 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 26330 event pairs, 658 based on Foata normal form. 26/3126 useless extension candidates. Maximal degree in co-relation 4638. Up to 1309 conditions per place. [2020-10-16 05:57:01,692 INFO L132 encePairwiseOnDemand]: 179/186 looper letters, 14 selfloop transitions, 9 changer transitions 0/66 dead transitions. [2020-10-16 05:57:01,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 66 transitions, 413 flow [2020-10-16 05:57:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:57:01,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:57:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 621 transitions. [2020-10-16 05:57:01,694 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.667741935483871 [2020-10-16 05:57:01,694 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 621 transitions. [2020-10-16 05:57:01,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 621 transitions. [2020-10-16 05:57:01,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:01,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 621 transitions. [2020-10-16 05:57:01,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:57:01,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:57:01,697 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:57:01,697 INFO L185 Difference]: Start difference. First operand has 80 places, 60 transitions, 338 flow. Second operand 5 states and 621 transitions. [2020-10-16 05:57:01,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 66 transitions, 413 flow [2020-10-16 05:57:01,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 66 transitions, 389 flow, removed 8 selfloop flow, removed 4 redundant places. [2020-10-16 05:57:01,706 INFO L241 Difference]: Finished difference. Result has 81 places, 62 transitions, 355 flow [2020-10-16 05:57:01,706 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=355, PETRI_PLACES=81, PETRI_TRANSITIONS=62} [2020-10-16 05:57:01,706 INFO L342 CegarLoopForPetriNet]: 60 programPoint places, 21 predicate places. [2020-10-16 05:57:01,706 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 62 transitions, 355 flow [2020-10-16 05:57:01,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 05:57:01,706 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:01,707 INFO L255 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:01,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 05:57:01,907 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:01,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:01,908 INFO L82 PathProgramCache]: Analyzing trace with hash -436182876, now seen corresponding path program 1 times [2020-10-16 05:57:01,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:01,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340139630] [2020-10-16 05:57:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:57:01,919 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:57:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:57:01,928 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:57:01,934 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:57:01,935 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:57:01,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-16 05:57:01,935 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:57:01,936 WARN L371 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:57:01,936 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2020-10-16 05:57:01,950 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,951 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,951 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,951 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,951 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,951 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,951 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,951 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,952 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,952 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,952 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,952 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,952 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,952 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,953 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,953 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,953 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,953 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,953 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,953 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,954 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,954 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,954 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,954 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,955 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,955 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,955 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,955 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,955 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,955 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,955 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,955 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,956 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,956 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,956 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,956 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,956 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,956 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,956 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,957 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,957 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,957 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,958 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,958 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,958 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,959 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,959 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,959 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,959 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,959 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,959 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,959 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,959 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,960 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,960 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,960 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,960 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,960 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,960 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,960 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,961 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,961 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,961 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,962 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,962 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,962 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,962 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,962 WARN L313 ript$VariableManager]: TermVariabe thrThread1of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,963 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,963 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,964 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,964 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,964 WARN L313 ript$VariableManager]: TermVariabe thrThread2of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,965 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,965 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,966 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,966 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,966 WARN L313 ript$VariableManager]: TermVariabe thrThread3of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,967 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,967 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,967 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,967 WARN L313 ript$VariableManager]: TermVariabe thrThread4of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,967 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,968 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,968 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,968 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,968 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,968 WARN L313 ript$VariableManager]: TermVariabe thrThread5of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,969 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,969 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,969 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,969 WARN L313 ript$VariableManager]: TermVariabe thrThread6of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,969 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,972 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,972 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,972 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,972 WARN L313 ript$VariableManager]: TermVariabe thrThread7of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,972 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,973 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,974 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,974 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,974 WARN L313 ript$VariableManager]: TermVariabe thrThread8of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,974 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,975 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,975 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,975 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,975 WARN L313 ript$VariableManager]: TermVariabe thrThread9of9ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,976 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of9ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:01,981 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:57:01,982 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:57:01,982 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:57:01,982 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:57:01,982 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:57:01,982 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:57:01,982 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:57:01,982 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:57:01,982 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:57:01,984 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 131 places, 127 transitions, 398 flow [2020-10-16 05:57:03,722 INFO L129 PetriNetUnfolder]: 3861/18336 cut-off events. [2020-10-16 05:57:03,722 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-16 05:57:03,837 INFO L80 FinitePrefix]: Finished finitePrefix Result has 20713 conditions, 18336 events. 3861/18336 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 205615 event pairs, 1291 based on Foata normal form. 0/15243 useless extension candidates. Maximal degree in co-relation 10172. Up to 2304 conditions per place. [2020-10-16 05:57:03,837 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 127 transitions, 398 flow [2020-10-16 05:57:03,876 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 120 transitions, 384 flow [2020-10-16 05:57:03,877 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:57:03,877 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 120 transitions, 384 flow [2020-10-16 05:57:03,877 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 120 transitions, 384 flow [2020-10-16 05:57:03,877 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 125 places, 120 transitions, 384 flow [2020-10-16 05:57:05,548 INFO L129 PetriNetUnfolder]: 3349/14752 cut-off events. [2020-10-16 05:57:05,549 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-16 05:57:05,660 INFO L80 FinitePrefix]: Finished finitePrefix Result has 17129 conditions, 14752 events. 3349/14752 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 156456 event pairs, 1291 based on Foata normal form. 0/12683 useless extension candidates. Maximal degree in co-relation 8380. Up to 2304 conditions per place. [2020-10-16 05:57:06,053 INFO L117 LiptonReduction]: Number of co-enabled transitions 5940 [2020-10-16 05:57:07,617 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-16 05:57:07,764 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-16 05:57:07,787 INFO L132 LiptonReduction]: Checked pairs total: 28628 [2020-10-16 05:57:07,787 INFO L134 LiptonReduction]: Total number of compositions: 71 [2020-10-16 05:57:07,787 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 3910 [2020-10-16 05:57:07,788 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 05:57:07,789 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:57:07,789 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:07,789 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:57:07,789 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:07,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:07,790 INFO L82 PathProgramCache]: Analyzing trace with hash 50460177, now seen corresponding path program 1 times [2020-10-16 05:57:07,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:07,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798018464] [2020-10-16 05:57:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:57:07,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798018464] [2020-10-16 05:57:07,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:57:07,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:57:07,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140895598] [2020-10-16 05:57:07,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:57:07,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:07,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:57:07,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:57:07,810 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 05:57:07,810 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 258 flow. Second operand 3 states. [2020-10-16 05:57:07,810 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:07,810 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 05:57:07,810 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:08,310 INFO L129 PetriNetUnfolder]: 2313/5449 cut-off events. [2020-10-16 05:57:08,311 INFO L130 PetriNetUnfolder]: For 2460/2460 co-relation queries the response was YES. [2020-10-16 05:57:08,333 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10415 conditions, 5449 events. 2313/5449 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 39806 event pairs, 1291 based on Foata normal form. 0/4416 useless extension candidates. Maximal degree in co-relation 5018. Up to 2587 conditions per place. [2020-10-16 05:57:08,351 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 9 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2020-10-16 05:57:08,351 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 284 flow [2020-10-16 05:57:08,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:57:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:57:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2020-10-16 05:57:08,352 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2020-10-16 05:57:08,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2020-10-16 05:57:08,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2020-10-16 05:57:08,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:08,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2020-10-16 05:57:08,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:57:08,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:57:08,354 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:57:08,354 INFO L185 Difference]: Start difference. First operand has 66 places, 57 transitions, 258 flow. Second operand 3 states and 402 transitions. [2020-10-16 05:57:08,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 284 flow [2020-10-16 05:57:08,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 59 transitions, 284 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:57:08,357 INFO L241 Difference]: Finished difference. Result has 69 places, 58 transitions, 270 flow [2020-10-16 05:57:08,358 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=69, PETRI_TRANSITIONS=58} [2020-10-16 05:57:08,358 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2020-10-16 05:57:08,358 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 58 transitions, 270 flow [2020-10-16 05:57:08,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:57:08,358 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:08,358 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:08,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-16 05:57:08,358 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:08,358 INFO L82 PathProgramCache]: Analyzing trace with hash -93476314, now seen corresponding path program 1 times [2020-10-16 05:57:08,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:08,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623069108] [2020-10-16 05:57:08,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:57:08,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623069108] [2020-10-16 05:57:08,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:57:08,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:57:08,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307062035] [2020-10-16 05:57:08,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:57:08,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:08,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:57:08,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:57:08,500 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 05:57:08,500 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 270 flow. Second operand 4 states. [2020-10-16 05:57:08,500 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:08,500 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 05:57:08,500 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:08,999 INFO L129 PetriNetUnfolder]: 2340/6073 cut-off events. [2020-10-16 05:57:08,999 INFO L130 PetriNetUnfolder]: For 2505/2505 co-relation queries the response was YES. [2020-10-16 05:57:09,026 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11649 conditions, 6073 events. 2340/6073 cut-off events. For 2505/2505 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47741 event pairs, 1327 based on Foata normal form. 0/5051 useless extension candidates. Maximal degree in co-relation 11623. Up to 2609 conditions per place. [2020-10-16 05:57:09,045 INFO L132 encePairwiseOnDemand]: 191/198 looper letters, 8 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2020-10-16 05:57:09,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 62 transitions, 306 flow [2020-10-16 05:57:09,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:57:09,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:57:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 536 transitions. [2020-10-16 05:57:09,046 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2020-10-16 05:57:09,046 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 536 transitions. [2020-10-16 05:57:09,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 536 transitions. [2020-10-16 05:57:09,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:09,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 536 transitions. [2020-10-16 05:57:09,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:57:09,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:57:09,048 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:57:09,048 INFO L185 Difference]: Start difference. First operand has 69 places, 58 transitions, 270 flow. Second operand 4 states and 536 transitions. [2020-10-16 05:57:09,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 62 transitions, 306 flow [2020-10-16 05:57:09,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 62 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:57:09,051 INFO L241 Difference]: Finished difference. Result has 72 places, 60 transitions, 296 flow [2020-10-16 05:57:09,051 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2020-10-16 05:57:09,052 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2020-10-16 05:57:09,052 INFO L481 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 296 flow [2020-10-16 05:57:09,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:57:09,052 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:09,052 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:09,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-16 05:57:09,052 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:09,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:09,052 INFO L82 PathProgramCache]: Analyzing trace with hash 637668557, now seen corresponding path program 1 times [2020-10-16 05:57:09,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:09,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846563556] [2020-10-16 05:57:09,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:09,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846563556] [2020-10-16 05:57:09,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179802527] [2020-10-16 05:57:09,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:09,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:57:09,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:09,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:09,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 05:57:09,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068955242] [2020-10-16 05:57:09,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:57:09,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:09,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:57:09,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:57:09,182 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 05:57:09,182 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 296 flow. Second operand 6 states. [2020-10-16 05:57:09,183 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:09,183 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 05:57:09,183 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:09,702 INFO L129 PetriNetUnfolder]: 2339/6068 cut-off events. [2020-10-16 05:57:09,703 INFO L130 PetriNetUnfolder]: For 3060/3060 co-relation queries the response was YES. [2020-10-16 05:57:09,738 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14795 conditions, 6068 events. 2339/6068 cut-off events. For 3060/3060 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47628 event pairs, 1327 based on Foata normal form. 1/5558 useless extension candidates. Maximal degree in co-relation 7510. Up to 3134 conditions per place. [2020-10-16 05:57:09,941 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 12 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2020-10-16 05:57:09,941 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 334 flow [2020-10-16 05:57:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:57:09,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:57:09,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 534 transitions. [2020-10-16 05:57:09,942 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6742424242424242 [2020-10-16 05:57:09,943 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 534 transitions. [2020-10-16 05:57:09,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 534 transitions. [2020-10-16 05:57:09,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:09,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 534 transitions. [2020-10-16 05:57:09,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:57:09,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:57:09,944 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:57:09,944 INFO L185 Difference]: Start difference. First operand has 72 places, 60 transitions, 296 flow. Second operand 4 states and 534 transitions. [2020-10-16 05:57:09,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 334 flow [2020-10-16 05:57:09,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 63 transitions, 333 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:57:09,949 INFO L241 Difference]: Finished difference. Result has 75 places, 61 transitions, 311 flow [2020-10-16 05:57:09,949 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=311, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2020-10-16 05:57:09,949 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2020-10-16 05:57:09,949 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 311 flow [2020-10-16 05:57:09,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:57:09,949 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:09,950 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:10,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:10,163 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:10,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:10,163 INFO L82 PathProgramCache]: Analyzing trace with hash -400747775, now seen corresponding path program 1 times [2020-10-16 05:57:10,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:10,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278066102] [2020-10-16 05:57:10,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:10,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278066102] [2020-10-16 05:57:10,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151290858] [2020-10-16 05:57:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:10,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 05:57:10,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:10,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:10,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 05:57:10,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848686324] [2020-10-16 05:57:10,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 05:57:10,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:10,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 05:57:10,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-10-16 05:57:10,302 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 05:57:10,303 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 311 flow. Second operand 8 states. [2020-10-16 05:57:10,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:10,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 05:57:10,303 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:10,898 INFO L129 PetriNetUnfolder]: 2337/6060 cut-off events. [2020-10-16 05:57:10,898 INFO L130 PetriNetUnfolder]: For 3079/3079 co-relation queries the response was YES. [2020-10-16 05:57:10,930 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14794 conditions, 6060 events. 2337/6060 cut-off events. For 3079/3079 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47598 event pairs, 1328 based on Foata normal form. 1/5550 useless extension candidates. Maximal degree in co-relation 14750. Up to 3128 conditions per place. [2020-10-16 05:57:10,950 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 13 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2020-10-16 05:57:10,950 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 65 transitions, 357 flow [2020-10-16 05:57:10,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:57:10,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:57:10,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 666 transitions. [2020-10-16 05:57:10,952 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6727272727272727 [2020-10-16 05:57:10,952 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 666 transitions. [2020-10-16 05:57:10,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 666 transitions. [2020-10-16 05:57:10,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:10,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 666 transitions. [2020-10-16 05:57:10,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:57:10,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:57:10,953 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:57:10,954 INFO L185 Difference]: Start difference. First operand has 75 places, 61 transitions, 311 flow. Second operand 5 states and 666 transitions. [2020-10-16 05:57:10,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 65 transitions, 357 flow [2020-10-16 05:57:10,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 65 transitions, 351 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 05:57:10,959 INFO L241 Difference]: Finished difference. Result has 78 places, 62 transitions, 325 flow [2020-10-16 05:57:10,959 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=78, PETRI_TRANSITIONS=62} [2020-10-16 05:57:10,960 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2020-10-16 05:57:10,960 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 62 transitions, 325 flow [2020-10-16 05:57:10,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 05:57:10,960 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:10,960 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:11,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 05:57:11,166 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:11,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:11,166 INFO L82 PathProgramCache]: Analyzing trace with hash 475549348, now seen corresponding path program 1 times [2020-10-16 05:57:11,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:11,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843060104] [2020-10-16 05:57:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:11,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843060104] [2020-10-16 05:57:11,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560606185] [2020-10-16 05:57:11,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:11,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 05:57:11,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:11,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:11,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:11,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 05:57:11,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560083298] [2020-10-16 05:57:11,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 05:57:11,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:11,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 05:57:11,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-10-16 05:57:11,339 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 05:57:11,340 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 62 transitions, 325 flow. Second operand 10 states. [2020-10-16 05:57:11,340 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:11,340 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 05:57:11,340 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:12,096 INFO L129 PetriNetUnfolder]: 2334/6049 cut-off events. [2020-10-16 05:57:12,096 INFO L130 PetriNetUnfolder]: For 3096/3096 co-relation queries the response was YES. [2020-10-16 05:57:12,115 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14781 conditions, 6049 events. 2334/6049 cut-off events. For 3096/3096 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 47816 event pairs, 1332 based on Foata normal form. 1/5539 useless extension candidates. Maximal degree in co-relation 14722. Up to 3121 conditions per place. [2020-10-16 05:57:12,132 INFO L132 encePairwiseOnDemand]: 195/198 looper letters, 14 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2020-10-16 05:57:12,133 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 67 transitions, 379 flow [2020-10-16 05:57:12,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 05:57:12,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 05:57:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 798 transitions. [2020-10-16 05:57:12,134 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6717171717171717 [2020-10-16 05:57:12,134 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 798 transitions. [2020-10-16 05:57:12,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 798 transitions. [2020-10-16 05:57:12,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:12,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 798 transitions. [2020-10-16 05:57:12,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 05:57:12,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 05:57:12,136 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 05:57:12,136 INFO L185 Difference]: Start difference. First operand has 78 places, 62 transitions, 325 flow. Second operand 6 states and 798 transitions. [2020-10-16 05:57:12,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 67 transitions, 379 flow [2020-10-16 05:57:12,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 67 transitions, 369 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 05:57:12,141 INFO L241 Difference]: Finished difference. Result has 81 places, 63 transitions, 339 flow [2020-10-16 05:57:12,141 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=81, PETRI_TRANSITIONS=63} [2020-10-16 05:57:12,141 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2020-10-16 05:57:12,141 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 63 transitions, 339 flow [2020-10-16 05:57:12,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 05:57:12,141 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:12,142 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:12,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-10-16 05:57:12,342 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:12,343 INFO L82 PathProgramCache]: Analyzing trace with hash 873129670, now seen corresponding path program 1 times [2020-10-16 05:57:12,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:12,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113318348] [2020-10-16 05:57:12,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:12,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113318348] [2020-10-16 05:57:12,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694529552] [2020-10-16 05:57:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:12,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 05:57:12,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:12,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:12,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 05:57:12,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131544292] [2020-10-16 05:57:12,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 05:57:12,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:12,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 05:57:12,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2020-10-16 05:57:12,540 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 05:57:12,541 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 63 transitions, 339 flow. Second operand 12 states. [2020-10-16 05:57:12,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:12,541 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 05:57:12,541 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:13,103 INFO L129 PetriNetUnfolder]: 2330/6035 cut-off events. [2020-10-16 05:57:13,103 INFO L130 PetriNetUnfolder]: For 3111/3111 co-relation queries the response was YES. [2020-10-16 05:57:13,133 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14757 conditions, 6035 events. 2330/6035 cut-off events. For 3111/3111 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 48189 event pairs, 1343 based on Foata normal form. 1/5525 useless extension candidates. Maximal degree in co-relation 14682. Up to 2592 conditions per place. [2020-10-16 05:57:13,153 INFO L132 encePairwiseOnDemand]: 192/198 looper letters, 10 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2020-10-16 05:57:13,154 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 69 transitions, 401 flow [2020-10-16 05:57:13,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 05:57:13,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 05:57:13,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1060 transitions. [2020-10-16 05:57:13,155 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6691919191919192 [2020-10-16 05:57:13,155 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1060 transitions. [2020-10-16 05:57:13,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1060 transitions. [2020-10-16 05:57:13,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:13,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1060 transitions. [2020-10-16 05:57:13,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 05:57:13,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 05:57:13,157 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 05:57:13,158 INFO L185 Difference]: Start difference. First operand has 81 places, 63 transitions, 339 flow. Second operand 8 states and 1060 transitions. [2020-10-16 05:57:13,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 69 transitions, 401 flow [2020-10-16 05:57:13,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 69 transitions, 387 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 05:57:13,165 INFO L241 Difference]: Finished difference. Result has 86 places, 65 transitions, 372 flow [2020-10-16 05:57:13,165 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=372, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2020-10-16 05:57:13,165 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 20 predicate places. [2020-10-16 05:57:13,165 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 372 flow [2020-10-16 05:57:13,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 05:57:13,165 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:13,165 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:13,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:13,366 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:13,367 INFO L82 PathProgramCache]: Analyzing trace with hash 921562965, now seen corresponding path program 1 times [2020-10-16 05:57:13,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:13,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26332686] [2020-10-16 05:57:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 05:57:13,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26332686] [2020-10-16 05:57:13,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757735809] [2020-10-16 05:57:13,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:13,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:57:13,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 05:57:13,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:13,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 05:57:13,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768621461] [2020-10-16 05:57:13,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 05:57:13,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:13,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 05:57:13,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-16 05:57:13,526 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 198 [2020-10-16 05:57:13,527 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 372 flow. Second operand 7 states. [2020-10-16 05:57:13,527 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:13,527 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 198 [2020-10-16 05:57:13,527 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:14,430 INFO L129 PetriNetUnfolder]: 2443/6823 cut-off events. [2020-10-16 05:57:14,430 INFO L130 PetriNetUnfolder]: For 6446/6446 co-relation queries the response was YES. [2020-10-16 05:57:14,455 INFO L80 FinitePrefix]: Finished finitePrefix Result has 18511 conditions, 6823 events. 2443/6823 cut-off events. For 6446/6446 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 58647 event pairs, 1491 based on Foata normal form. 35/6356 useless extension candidates. Maximal degree in co-relation 9324. Up to 2621 conditions per place. [2020-10-16 05:57:14,475 INFO L132 encePairwiseOnDemand]: 191/198 looper letters, 14 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2020-10-16 05:57:14,475 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 71 transitions, 447 flow [2020-10-16 05:57:14,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:57:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:57:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 671 transitions. [2020-10-16 05:57:14,476 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2020-10-16 05:57:14,477 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 671 transitions. [2020-10-16 05:57:14,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 671 transitions. [2020-10-16 05:57:14,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:14,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 671 transitions. [2020-10-16 05:57:14,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:57:14,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:57:14,478 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:57:14,479 INFO L185 Difference]: Start difference. First operand has 86 places, 65 transitions, 372 flow. Second operand 5 states and 671 transitions. [2020-10-16 05:57:14,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 71 transitions, 447 flow [2020-10-16 05:57:14,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 71 transitions, 423 flow, removed 8 selfloop flow, removed 4 redundant places. [2020-10-16 05:57:14,492 INFO L241 Difference]: Finished difference. Result has 87 places, 67 transitions, 389 flow [2020-10-16 05:57:14,492 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=198, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=87, PETRI_TRANSITIONS=67} [2020-10-16 05:57:14,492 INFO L342 CegarLoopForPetriNet]: 66 programPoint places, 21 predicate places. [2020-10-16 05:57:14,492 INFO L481 AbstractCegarLoop]: Abstraction has has 87 places, 67 transitions, 389 flow [2020-10-16 05:57:14,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 05:57:14,492 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:14,492 INFO L255 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:14,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-16 05:57:14,693 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:14,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2001719838, now seen corresponding path program 1 times [2020-10-16 05:57:14,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:14,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312377667] [2020-10-16 05:57:14,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:57:14,706 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:57:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:57:14,713 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:57:14,720 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:57:14,720 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:57:14,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-16 05:57:14,721 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:57:14,721 WARN L371 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:57:14,723 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2020-10-16 05:57:14,735 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,735 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,735 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,735 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,735 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,735 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,735 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,735 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,736 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,736 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,736 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,736 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,736 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,736 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,736 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,737 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,737 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,737 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,737 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,737 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,737 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,738 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,738 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,738 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,738 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,738 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,738 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,738 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,739 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,739 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,739 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,739 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,739 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,739 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,739 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,739 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,739 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,739 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,739 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,739 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,740 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,740 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,740 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,740 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,740 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,740 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,740 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,740 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,741 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,741 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,741 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,741 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,741 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,741 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,741 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,742 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,742 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,742 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,742 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,742 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,742 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,742 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,742 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,743 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,743 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,743 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,743 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,743 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,743 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,743 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,744 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,744 WARN L313 ript$VariableManager]: TermVariabe |thrThread1of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,744 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,744 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,744 WARN L313 ript$VariableManager]: TermVariabe thrThread1of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,745 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,745 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,746 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,746 WARN L313 ript$VariableManager]: TermVariabe |thrThread2of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,746 WARN L313 ript$VariableManager]: TermVariabe thrThread2of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,747 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,747 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,747 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,747 WARN L313 ript$VariableManager]: TermVariabe |thrThread3of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,747 WARN L313 ript$VariableManager]: TermVariabe thrThread3of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,749 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,749 WARN L313 ript$VariableManager]: TermVariabe |thrThread4of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,749 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,749 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,749 WARN L313 ript$VariableManager]: TermVariabe thrThread4of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,750 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,750 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,750 WARN L313 ript$VariableManager]: TermVariabe |thrThread5of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,750 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,750 WARN L313 ript$VariableManager]: TermVariabe thrThread5of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,751 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,751 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,752 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,752 WARN L313 ript$VariableManager]: TermVariabe |thrThread6of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,752 WARN L313 ript$VariableManager]: TermVariabe thrThread6of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,753 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,753 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,753 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,754 WARN L313 ript$VariableManager]: TermVariabe |thrThread7of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,754 WARN L313 ript$VariableManager]: TermVariabe thrThread7of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,755 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,755 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,755 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,755 WARN L313 ript$VariableManager]: TermVariabe |thrThread8of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,756 WARN L313 ript$VariableManager]: TermVariabe thrThread8of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,756 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,756 WARN L313 ript$VariableManager]: TermVariabe |thrThread9of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,756 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,756 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,757 WARN L313 ript$VariableManager]: TermVariabe thrThread9of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,757 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,757 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,757 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,758 WARN L313 ript$VariableManager]: TermVariabe |thrThread10of10ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,758 WARN L313 ript$VariableManager]: TermVariabe thrThread10of10ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:57:14,764 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-16 05:57:14,764 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:57:14,764 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:57:14,765 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:57:14,765 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:57:14,765 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:57:14,765 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:57:14,765 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:57:14,765 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:57:14,767 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 139 places, 134 transitions, 438 flow [2020-10-16 05:57:20,262 INFO L129 PetriNetUnfolder]: 8215/37039 cut-off events. [2020-10-16 05:57:20,262 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-16 05:57:20,481 INFO L80 FinitePrefix]: Finished finitePrefix Result has 42245 conditions, 37039 events. 8215/37039 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 468035 event pairs, 3084 based on Foata normal form. 0/30872 useless extension candidates. Maximal degree in co-relation 20694. Up to 5120 conditions per place. [2020-10-16 05:57:20,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 134 transitions, 438 flow [2020-10-16 05:57:20,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 127 transitions, 424 flow [2020-10-16 05:57:20,561 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:57:20,561 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 127 transitions, 424 flow [2020-10-16 05:57:20,561 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 127 transitions, 424 flow [2020-10-16 05:57:20,561 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 133 places, 127 transitions, 424 flow [2020-10-16 05:57:24,016 INFO L129 PetriNetUnfolder]: 7191/29871 cut-off events. [2020-10-16 05:57:24,016 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-16 05:57:24,229 INFO L80 FinitePrefix]: Finished finitePrefix Result has 35077 conditions, 29871 events. 7191/29871 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 356661 event pairs, 3084 based on Foata normal form. 0/25752 useless extension candidates. Maximal degree in co-relation 17110. Up to 5120 conditions per place. [2020-10-16 05:57:24,853 INFO L117 LiptonReduction]: Number of co-enabled transitions 7000 [2020-10-16 05:57:26,775 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-16 05:57:27,008 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-16 05:57:27,092 INFO L132 LiptonReduction]: Checked pairs total: 33303 [2020-10-16 05:57:27,093 INFO L134 LiptonReduction]: Total number of compositions: 69 [2020-10-16 05:57:27,093 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 6532 [2020-10-16 05:57:27,094 INFO L129 PetriNetUnfolder]: 1/9 cut-off events. [2020-10-16 05:57:27,094 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:57:27,094 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:27,094 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2020-10-16 05:57:27,094 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:27,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:27,095 INFO L82 PathProgramCache]: Analyzing trace with hash 56928945, now seen corresponding path program 1 times [2020-10-16 05:57:27,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:27,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143519169] [2020-10-16 05:57:27,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:57:27,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143519169] [2020-10-16 05:57:27,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:57:27,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:57:27,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803593203] [2020-10-16 05:57:27,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:57:27,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:27,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:57:27,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:57:27,123 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:27,124 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 62 transitions, 294 flow. Second operand 3 states. [2020-10-16 05:57:27,124 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:27,124 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:27,124 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:28,645 INFO L129 PetriNetUnfolder]: 5130/11345 cut-off events. [2020-10-16 05:57:28,645 INFO L130 PetriNetUnfolder]: For 5330/5330 co-relation queries the response was YES. [2020-10-16 05:57:28,700 INFO L80 FinitePrefix]: Finished finitePrefix Result has 21703 conditions, 11345 events. 5130/11345 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 91343 event pairs, 3084 based on Foata normal form. 0/9287 useless extension candidates. Maximal degree in co-relation 10417. Up to 5150 conditions per place. [2020-10-16 05:57:28,739 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 9 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2020-10-16 05:57:28,740 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 64 transitions, 320 flow [2020-10-16 05:57:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:57:28,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:57:28,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2020-10-16 05:57:28,741 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6995073891625616 [2020-10-16 05:57:28,741 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2020-10-16 05:57:28,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2020-10-16 05:57:28,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:28,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2020-10-16 05:57:28,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:57:28,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:57:28,743 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:57:28,743 INFO L185 Difference]: Start difference. First operand has 72 places, 62 transitions, 294 flow. Second operand 3 states and 426 transitions. [2020-10-16 05:57:28,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 64 transitions, 320 flow [2020-10-16 05:57:28,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 64 transitions, 320 flow, removed 0 selfloop flow, removed 0 redundant places. [2020-10-16 05:57:28,752 INFO L241 Difference]: Finished difference. Result has 75 places, 63 transitions, 306 flow [2020-10-16 05:57:28,752 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=75, PETRI_TRANSITIONS=63} [2020-10-16 05:57:28,752 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2020-10-16 05:57:28,753 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 63 transitions, 306 flow [2020-10-16 05:57:28,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:57:28,753 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:28,753 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:28,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-16 05:57:28,753 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:28,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:28,754 INFO L82 PathProgramCache]: Analyzing trace with hash 277330913, now seen corresponding path program 1 times [2020-10-16 05:57:28,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:28,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690410361] [2020-10-16 05:57:28,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:28,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:57:28,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690410361] [2020-10-16 05:57:28,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:57:28,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:57:28,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47659808] [2020-10-16 05:57:28,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:57:28,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:28,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:57:28,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:57:28,774 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:28,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 63 transitions, 306 flow. Second operand 4 states. [2020-10-16 05:57:28,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:28,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:28,775 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:29,836 INFO L129 PetriNetUnfolder]: 5165/12509 cut-off events. [2020-10-16 05:57:29,836 INFO L130 PetriNetUnfolder]: For 5385/5385 co-relation queries the response was YES. [2020-10-16 05:57:29,908 INFO L80 FinitePrefix]: Finished finitePrefix Result has 24010 conditions, 12509 events. 5165/12509 cut-off events. For 5385/5385 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108501 event pairs, 3129 based on Foata normal form. 0/10463 useless extension candidates. Maximal degree in co-relation 23983. Up to 5180 conditions per place. [2020-10-16 05:57:30,543 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 8 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2020-10-16 05:57:30,543 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 67 transitions, 342 flow [2020-10-16 05:57:30,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:57:30,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:57:30,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 568 transitions. [2020-10-16 05:57:30,544 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6995073891625616 [2020-10-16 05:57:30,544 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 568 transitions. [2020-10-16 05:57:30,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 568 transitions. [2020-10-16 05:57:30,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:30,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 568 transitions. [2020-10-16 05:57:30,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:57:30,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:57:30,546 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:57:30,546 INFO L185 Difference]: Start difference. First operand has 75 places, 63 transitions, 306 flow. Second operand 4 states and 568 transitions. [2020-10-16 05:57:30,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 67 transitions, 342 flow [2020-10-16 05:57:30,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 67 transitions, 340 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:57:30,554 INFO L241 Difference]: Finished difference. Result has 78 places, 65 transitions, 332 flow [2020-10-16 05:57:30,554 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=332, PETRI_PLACES=78, PETRI_TRANSITIONS=65} [2020-10-16 05:57:30,554 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2020-10-16 05:57:30,554 INFO L481 AbstractCegarLoop]: Abstraction has has 78 places, 65 transitions, 332 flow [2020-10-16 05:57:30,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:57:30,554 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:30,554 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:30,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-16 05:57:30,555 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:30,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:30,555 INFO L82 PathProgramCache]: Analyzing trace with hash -190386445, now seen corresponding path program 1 times [2020-10-16 05:57:30,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:30,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741271195] [2020-10-16 05:57:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:30,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741271195] [2020-10-16 05:57:30,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437655349] [2020-10-16 05:57:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:30,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:57:30,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:30,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:30,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:30,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2020-10-16 05:57:30,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787391737] [2020-10-16 05:57:30,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 05:57:30,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:30,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 05:57:30,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 05:57:30,708 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:30,709 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 65 transitions, 332 flow. Second operand 6 states. [2020-10-16 05:57:30,709 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:30,709 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:30,709 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:31,875 INFO L129 PetriNetUnfolder]: 5164/12504 cut-off events. [2020-10-16 05:57:31,875 INFO L130 PetriNetUnfolder]: For 6462/6462 co-relation queries the response was YES. [2020-10-16 05:57:31,958 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30248 conditions, 12504 events. 5164/12504 cut-off events. For 6462/6462 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108070 event pairs, 3129 based on Foata normal form. 1/11482 useless extension candidates. Maximal degree in co-relation 15456. Up to 6219 conditions per place. [2020-10-16 05:57:32,007 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 12 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2020-10-16 05:57:32,007 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 68 transitions, 370 flow [2020-10-16 05:57:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:57:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:57:32,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 566 transitions. [2020-10-16 05:57:32,008 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6970443349753694 [2020-10-16 05:57:32,008 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 566 transitions. [2020-10-16 05:57:32,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 566 transitions. [2020-10-16 05:57:32,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:32,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 566 transitions. [2020-10-16 05:57:32,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:57:32,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:57:32,010 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:57:32,010 INFO L185 Difference]: Start difference. First operand has 78 places, 65 transitions, 332 flow. Second operand 4 states and 566 transitions. [2020-10-16 05:57:32,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 68 transitions, 370 flow [2020-10-16 05:57:32,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 68 transitions, 369 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:57:32,017 INFO L241 Difference]: Finished difference. Result has 81 places, 66 transitions, 347 flow [2020-10-16 05:57:32,018 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=347, PETRI_PLACES=81, PETRI_TRANSITIONS=66} [2020-10-16 05:57:32,018 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 9 predicate places. [2020-10-16 05:57:32,018 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 66 transitions, 347 flow [2020-10-16 05:57:32,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 05:57:32,018 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:32,018 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:32,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-16 05:57:32,219 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:32,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:32,220 INFO L82 PathProgramCache]: Analyzing trace with hash 495797898, now seen corresponding path program 1 times [2020-10-16 05:57:32,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:32,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644281378] [2020-10-16 05:57:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:32,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644281378] [2020-10-16 05:57:32,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375863023] [2020-10-16 05:57:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:32,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 05:57:32,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:32,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:32,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:32,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-16 05:57:32,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221899170] [2020-10-16 05:57:32,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 05:57:32,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:32,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 05:57:32,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-16 05:57:32,372 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:32,373 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 66 transitions, 347 flow. Second operand 8 states. [2020-10-16 05:57:32,373 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:32,373 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:32,373 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:34,467 INFO L129 PetriNetUnfolder]: 5162/12496 cut-off events. [2020-10-16 05:57:34,467 INFO L130 PetriNetUnfolder]: For 6483/6483 co-relation queries the response was YES. [2020-10-16 05:57:34,531 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30249 conditions, 12496 events. 5162/12496 cut-off events. For 6483/6483 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108143 event pairs, 3130 based on Foata normal form. 1/11474 useless extension candidates. Maximal degree in co-relation 30204. Up to 6213 conditions per place. [2020-10-16 05:57:34,574 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 13 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2020-10-16 05:57:34,574 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 70 transitions, 393 flow [2020-10-16 05:57:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:57:34,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:57:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 706 transitions. [2020-10-16 05:57:34,575 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6955665024630542 [2020-10-16 05:57:34,575 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 706 transitions. [2020-10-16 05:57:34,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 706 transitions. [2020-10-16 05:57:34,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:34,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 706 transitions. [2020-10-16 05:57:34,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:57:34,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:57:34,577 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:57:34,577 INFO L185 Difference]: Start difference. First operand has 81 places, 66 transitions, 347 flow. Second operand 5 states and 706 transitions. [2020-10-16 05:57:34,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 70 transitions, 393 flow [2020-10-16 05:57:34,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 70 transitions, 387 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 05:57:34,584 INFO L241 Difference]: Finished difference. Result has 84 places, 67 transitions, 361 flow [2020-10-16 05:57:34,585 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=84, PETRI_TRANSITIONS=67} [2020-10-16 05:57:34,585 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 12 predicate places. [2020-10-16 05:57:34,585 INFO L481 AbstractCegarLoop]: Abstraction has has 84 places, 67 transitions, 361 flow [2020-10-16 05:57:34,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 05:57:34,585 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:34,585 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:34,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:34,786 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:34,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:34,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1773387480, now seen corresponding path program 1 times [2020-10-16 05:57:34,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:34,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545896523] [2020-10-16 05:57:34,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:34,820 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:34,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545896523] [2020-10-16 05:57:34,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875984712] [2020-10-16 05:57:34,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:34,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 05:57:34,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:34,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:34,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-16 05:57:34,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084900513] [2020-10-16 05:57:34,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 05:57:34,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:34,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 05:57:34,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=48, Unknown=0, NotChecked=0, Total=90 [2020-10-16 05:57:34,973 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:34,973 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 67 transitions, 361 flow. Second operand 10 states. [2020-10-16 05:57:34,973 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:34,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:34,973 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:36,204 INFO L129 PetriNetUnfolder]: 5159/12485 cut-off events. [2020-10-16 05:57:36,204 INFO L130 PetriNetUnfolder]: For 6503/6503 co-relation queries the response was YES. [2020-10-16 05:57:36,291 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30238 conditions, 12485 events. 5159/12485 cut-off events. For 6503/6503 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108249 event pairs, 3134 based on Foata normal form. 1/11463 useless extension candidates. Maximal degree in co-relation 30178. Up to 6206 conditions per place. [2020-10-16 05:57:36,339 INFO L132 encePairwiseOnDemand]: 200/203 looper letters, 14 selfloop transitions, 5 changer transitions 0/72 dead transitions. [2020-10-16 05:57:36,339 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 72 transitions, 415 flow [2020-10-16 05:57:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 05:57:36,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 05:57:36,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 846 transitions. [2020-10-16 05:57:36,341 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6945812807881774 [2020-10-16 05:57:36,341 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 846 transitions. [2020-10-16 05:57:36,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 846 transitions. [2020-10-16 05:57:36,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:36,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 846 transitions. [2020-10-16 05:57:36,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 05:57:36,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 05:57:36,343 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 05:57:36,343 INFO L185 Difference]: Start difference. First operand has 84 places, 67 transitions, 361 flow. Second operand 6 states and 846 transitions. [2020-10-16 05:57:36,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 72 transitions, 415 flow [2020-10-16 05:57:36,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 72 transitions, 405 flow, removed 2 selfloop flow, removed 3 redundant places. [2020-10-16 05:57:36,353 INFO L241 Difference]: Finished difference. Result has 87 places, 68 transitions, 375 flow [2020-10-16 05:57:36,354 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=375, PETRI_PLACES=87, PETRI_TRANSITIONS=68} [2020-10-16 05:57:36,354 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 15 predicate places. [2020-10-16 05:57:36,354 INFO L481 AbstractCegarLoop]: Abstraction has has 87 places, 68 transitions, 375 flow [2020-10-16 05:57:36,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 05:57:36,354 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:36,354 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:36,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:36,561 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:36,562 INFO L82 PathProgramCache]: Analyzing trace with hash 43326697, now seen corresponding path program 1 times [2020-10-16 05:57:36,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:36,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665079478] [2020-10-16 05:57:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:36,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665079478] [2020-10-16 05:57:36,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320487160] [2020-10-16 05:57:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:36,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 05:57:36,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:36,761 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:57:36,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:36,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-16 05:57:36,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922048268] [2020-10-16 05:57:36,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 05:57:36,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:36,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 05:57:36,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2020-10-16 05:57:36,765 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:36,766 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 68 transitions, 375 flow. Second operand 12 states. [2020-10-16 05:57:36,766 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:36,766 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:36,766 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:38,091 INFO L129 PetriNetUnfolder]: 5155/12471 cut-off events. [2020-10-16 05:57:38,091 INFO L130 PetriNetUnfolder]: For 6522/6522 co-relation queries the response was YES. [2020-10-16 05:57:38,180 INFO L80 FinitePrefix]: Finished finitePrefix Result has 30216 conditions, 12471 events. 5155/12471 cut-off events. For 6522/6522 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 108601 event pairs, 3145 based on Foata normal form. 1/11449 useless extension candidates. Maximal degree in co-relation 30140. Up to 5163 conditions per place. [2020-10-16 05:57:38,228 INFO L132 encePairwiseOnDemand]: 197/203 looper letters, 10 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2020-10-16 05:57:38,229 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 74 transitions, 437 flow [2020-10-16 05:57:38,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 05:57:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 05:57:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1124 transitions. [2020-10-16 05:57:38,230 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6921182266009852 [2020-10-16 05:57:38,230 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1124 transitions. [2020-10-16 05:57:38,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1124 transitions. [2020-10-16 05:57:38,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:38,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1124 transitions. [2020-10-16 05:57:38,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 05:57:38,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 05:57:38,234 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 05:57:38,234 INFO L185 Difference]: Start difference. First operand has 87 places, 68 transitions, 375 flow. Second operand 8 states and 1124 transitions. [2020-10-16 05:57:38,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 74 transitions, 437 flow [2020-10-16 05:57:38,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 74 transitions, 423 flow, removed 3 selfloop flow, removed 4 redundant places. [2020-10-16 05:57:38,246 INFO L241 Difference]: Finished difference. Result has 92 places, 70 transitions, 408 flow [2020-10-16 05:57:38,246 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=408, PETRI_PLACES=92, PETRI_TRANSITIONS=70} [2020-10-16 05:57:38,246 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 20 predicate places. [2020-10-16 05:57:38,246 INFO L481 AbstractCegarLoop]: Abstraction has has 92 places, 70 transitions, 408 flow [2020-10-16 05:57:38,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 05:57:38,246 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:38,247 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:38,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:38,447 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:38,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:38,448 INFO L82 PathProgramCache]: Analyzing trace with hash 594075057, now seen corresponding path program 1 times [2020-10-16 05:57:38,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:38,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519945075] [2020-10-16 05:57:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:38,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:38,484 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 05:57:38,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519945075] [2020-10-16 05:57:38,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960731452] [2020-10-16 05:57:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:38,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 05:57:38,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-16 05:57:38,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:38,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 05:57:38,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758650124] [2020-10-16 05:57:38,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 05:57:38,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:38,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 05:57:38,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-10-16 05:57:38,622 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:38,623 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 70 transitions, 408 flow. Second operand 7 states. [2020-10-16 05:57:38,624 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:38,624 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:38,624 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:40,320 INFO L129 PetriNetUnfolder]: 5330/13919 cut-off events. [2020-10-16 05:57:40,321 INFO L130 PetriNetUnfolder]: For 12763/12763 co-relation queries the response was YES. [2020-10-16 05:57:40,383 INFO L80 FinitePrefix]: Finished finitePrefix Result has 37401 conditions, 13919 events. 5330/13919 cut-off events. For 12763/12763 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 130019 event pairs, 3365 based on Foata normal form. 45/12951 useless extension candidates. Maximal degree in co-relation 18883. Up to 5375 conditions per place. [2020-10-16 05:57:40,427 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 14 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2020-10-16 05:57:40,427 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 76 transitions, 483 flow [2020-10-16 05:57:40,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:57:40,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:57:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 711 transitions. [2020-10-16 05:57:40,429 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7004926108374384 [2020-10-16 05:57:40,429 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 711 transitions. [2020-10-16 05:57:40,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 711 transitions. [2020-10-16 05:57:40,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:40,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 711 transitions. [2020-10-16 05:57:40,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:57:40,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:57:40,431 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:57:40,431 INFO L185 Difference]: Start difference. First operand has 92 places, 70 transitions, 408 flow. Second operand 5 states and 711 transitions. [2020-10-16 05:57:40,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 76 transitions, 483 flow [2020-10-16 05:57:40,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 76 transitions, 459 flow, removed 8 selfloop flow, removed 4 redundant places. [2020-10-16 05:57:40,453 INFO L241 Difference]: Finished difference. Result has 93 places, 72 transitions, 425 flow [2020-10-16 05:57:40,453 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=425, PETRI_PLACES=93, PETRI_TRANSITIONS=72} [2020-10-16 05:57:40,453 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 21 predicate places. [2020-10-16 05:57:40,454 INFO L481 AbstractCegarLoop]: Abstraction has has 93 places, 72 transitions, 425 flow [2020-10-16 05:57:40,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 05:57:40,454 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:40,454 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:40,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-10-16 05:57:40,660 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:40,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:40,660 INFO L82 PathProgramCache]: Analyzing trace with hash 2031979255, now seen corresponding path program 1 times [2020-10-16 05:57:40,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:40,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788042759] [2020-10-16 05:57:40,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:40,703 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-16 05:57:40,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788042759] [2020-10-16 05:57:40,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240875408] [2020-10-16 05:57:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:40,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 05:57:40,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-16 05:57:40,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:40,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-10-16 05:57:40,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561136702] [2020-10-16 05:57:40,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 05:57:40,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:40,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 05:57:40,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-10-16 05:57:40,865 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:40,865 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 72 transitions, 425 flow. Second operand 9 states. [2020-10-16 05:57:40,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:40,866 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:40,866 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:42,542 INFO L129 PetriNetUnfolder]: 5790/15797 cut-off events. [2020-10-16 05:57:42,542 INFO L130 PetriNetUnfolder]: For 21329/21329 co-relation queries the response was YES. [2020-10-16 05:57:42,678 INFO L80 FinitePrefix]: Finished finitePrefix Result has 50568 conditions, 15797 events. 5790/15797 cut-off events. For 21329/21329 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 157387 event pairs, 3980 based on Foata normal form. 155/14984 useless extension candidates. Maximal degree in co-relation 25513. Up to 6215 conditions per place. [2020-10-16 05:57:42,737 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 15 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2020-10-16 05:57:42,737 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 80 transitions, 521 flow [2020-10-16 05:57:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 05:57:42,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 05:57:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 854 transitions. [2020-10-16 05:57:42,738 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2020-10-16 05:57:42,738 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 854 transitions. [2020-10-16 05:57:42,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 854 transitions. [2020-10-16 05:57:42,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:42,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 854 transitions. [2020-10-16 05:57:42,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 05:57:42,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 05:57:42,741 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 05:57:42,741 INFO L185 Difference]: Start difference. First operand has 93 places, 72 transitions, 425 flow. Second operand 6 states and 854 transitions. [2020-10-16 05:57:42,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 80 transitions, 521 flow [2020-10-16 05:57:42,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 80 transitions, 497 flow, removed 4 selfloop flow, removed 5 redundant places. [2020-10-16 05:57:42,795 INFO L241 Difference]: Finished difference. Result has 94 places, 74 transitions, 452 flow [2020-10-16 05:57:42,795 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=94, PETRI_TRANSITIONS=74} [2020-10-16 05:57:42,795 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 22 predicate places. [2020-10-16 05:57:42,796 INFO L481 AbstractCegarLoop]: Abstraction has has 94 places, 74 transitions, 452 flow [2020-10-16 05:57:42,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 05:57:42,796 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:42,796 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:42,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:42,997 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:42,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1529297233, now seen corresponding path program 1 times [2020-10-16 05:57:42,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:42,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538185671] [2020-10-16 05:57:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:43,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 163 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:57:43,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538185671] [2020-10-16 05:57:43,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277356064] [2020-10-16 05:57:43,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:43,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 05:57:43,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 200 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:57:43,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 05:57:43,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 23 [2020-10-16 05:57:43,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263360676] [2020-10-16 05:57:43,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 05:57:43,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:43,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 05:57:43,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=351, Unknown=0, NotChecked=0, Total=552 [2020-10-16 05:57:43,469 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:43,470 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 74 transitions, 452 flow. Second operand 13 states. [2020-10-16 05:57:43,470 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:43,471 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:43,471 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:48,547 INFO L129 PetriNetUnfolder]: 8000/34514 cut-off events. [2020-10-16 05:57:48,548 INFO L130 PetriNetUnfolder]: For 41105/41105 co-relation queries the response was YES. [2020-10-16 05:57:48,805 INFO L80 FinitePrefix]: Finished finitePrefix Result has 136378 conditions, 34514 events. 8000/34514 cut-off events. For 41105/41105 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 475498 event pairs, 7158 based on Foata normal form. 2/27740 useless extension candidates. Maximal degree in co-relation 71197. Up to 18423 conditions per place. [2020-10-16 05:57:48,907 INFO L132 encePairwiseOnDemand]: 195/203 looper letters, 28 selfloop transitions, 45 changer transitions 0/125 dead transitions. [2020-10-16 05:57:48,908 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 125 transitions, 961 flow [2020-10-16 05:57:48,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 05:57:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 05:57:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1870 transitions. [2020-10-16 05:57:48,910 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7086017430845017 [2020-10-16 05:57:48,910 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1870 transitions. [2020-10-16 05:57:48,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1870 transitions. [2020-10-16 05:57:48,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:48,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1870 transitions. [2020-10-16 05:57:48,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 05:57:48,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 05:57:48,914 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 05:57:48,914 INFO L185 Difference]: Start difference. First operand has 94 places, 74 transitions, 452 flow. Second operand 13 states and 1870 transitions. [2020-10-16 05:57:48,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 125 transitions, 961 flow [2020-10-16 05:57:48,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 125 transitions, 893 flow, removed 10 selfloop flow, removed 7 redundant places. [2020-10-16 05:57:48,973 INFO L241 Difference]: Finished difference. Result has 99 places, 101 transitions, 709 flow [2020-10-16 05:57:48,974 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=709, PETRI_PLACES=99, PETRI_TRANSITIONS=101} [2020-10-16 05:57:48,974 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 27 predicate places. [2020-10-16 05:57:48,974 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 709 flow [2020-10-16 05:57:48,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 05:57:48,974 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:48,974 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:49,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-10-16 05:57:49,181 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:49,181 INFO L82 PathProgramCache]: Analyzing trace with hash 982291090, now seen corresponding path program 1 times [2020-10-16 05:57:49,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:49,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608684968] [2020-10-16 05:57:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-16 05:57:49,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608684968] [2020-10-16 05:57:49,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132708699] [2020-10-16 05:57:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:49,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 05:57:49,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-16 05:57:49,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:49,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-10-16 05:57:49,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508319367] [2020-10-16 05:57:49,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 05:57:49,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:49,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 05:57:49,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2020-10-16 05:57:49,392 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:49,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 101 transitions, 709 flow. Second operand 11 states. [2020-10-16 05:57:49,393 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:49,393 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:49,393 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:57:55,285 INFO L129 PetriNetUnfolder]: 7795/31181 cut-off events. [2020-10-16 05:57:55,285 INFO L130 PetriNetUnfolder]: For 48064/48064 co-relation queries the response was YES. [2020-10-16 05:57:55,544 INFO L80 FinitePrefix]: Finished finitePrefix Result has 127675 conditions, 31181 events. 7795/31181 cut-off events. For 48064/48064 co-relation queries the response was YES. Maximal size of possible extension queue 1275. Compared 416479 event pairs, 7158 based on Foata normal form. 1173/32354 useless extension candidates. Maximal degree in co-relation 69147. Up to 14854 conditions per place. [2020-10-16 05:57:55,644 INFO L132 encePairwiseOnDemand]: 196/203 looper letters, 30 selfloop transitions, 26 changer transitions 0/108 dead transitions. [2020-10-16 05:57:55,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 108 transitions, 858 flow [2020-10-16 05:57:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 05:57:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 05:57:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 997 transitions. [2020-10-16 05:57:55,646 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7016185784658691 [2020-10-16 05:57:55,646 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 997 transitions. [2020-10-16 05:57:55,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 997 transitions. [2020-10-16 05:57:55,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:57:55,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 997 transitions. [2020-10-16 05:57:55,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 05:57:55,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 05:57:55,649 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 05:57:55,649 INFO L185 Difference]: Start difference. First operand has 99 places, 101 transitions, 709 flow. Second operand 7 states and 997 transitions. [2020-10-16 05:57:55,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 108 transitions, 858 flow [2020-10-16 05:57:55,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 108 transitions, 772 flow, removed 18 selfloop flow, removed 7 redundant places. [2020-10-16 05:57:55,780 INFO L241 Difference]: Finished difference. Result has 99 places, 100 transitions, 676 flow [2020-10-16 05:57:55,780 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=676, PETRI_PLACES=99, PETRI_TRANSITIONS=100} [2020-10-16 05:57:55,780 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 27 predicate places. [2020-10-16 05:57:55,780 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 100 transitions, 676 flow [2020-10-16 05:57:55,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 05:57:55,780 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:57:55,781 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:57:55,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:55,981 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:57:55,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:57:55,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1039046273, now seen corresponding path program 1 times [2020-10-16 05:57:55,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:57:55,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674971765] [2020-10-16 05:57:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:57:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-16 05:57:56,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674971765] [2020-10-16 05:57:56,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095683685] [2020-10-16 05:57:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:57:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:57:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 05:57:56,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:57:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-16 05:57:56,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:57:56,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-10-16 05:57:56,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614645930] [2020-10-16 05:57:56,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 05:57:56,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:57:56,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 05:57:56,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-16 05:57:56,280 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 203 [2020-10-16 05:57:56,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 100 transitions, 676 flow. Second operand 13 states. [2020-10-16 05:57:56,282 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:57:56,282 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 203 [2020-10-16 05:57:56,282 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:58:00,296 INFO L129 PetriNetUnfolder]: 7544/26512 cut-off events. [2020-10-16 05:58:00,296 INFO L130 PetriNetUnfolder]: For 46723/46723 co-relation queries the response was YES. [2020-10-16 05:58:00,479 INFO L80 FinitePrefix]: Finished finitePrefix Result has 106037 conditions, 26512 events. 7544/26512 cut-off events. For 46723/46723 co-relation queries the response was YES. Maximal size of possible extension queue 1139. Compared 328770 event pairs, 7158 based on Foata normal form. 1099/27611 useless extension candidates. Maximal degree in co-relation 45658. Up to 9645 conditions per place. [2020-10-16 05:58:00,561 INFO L132 encePairwiseOnDemand]: 194/203 looper letters, 16 selfloop transitions, 40 changer transitions 0/108 dead transitions. [2020-10-16 05:58:00,561 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 832 flow [2020-10-16 05:58:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-16 05:58:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-16 05:58:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1278 transitions. [2020-10-16 05:58:00,563 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6995073891625616 [2020-10-16 05:58:00,563 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1278 transitions. [2020-10-16 05:58:00,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1278 transitions. [2020-10-16 05:58:00,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:58:00,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1278 transitions. [2020-10-16 05:58:00,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 10 states. [2020-10-16 05:58:00,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 10 states. [2020-10-16 05:58:00,566 INFO L81 ComplementDD]: Finished complementDD. Result 10 states. [2020-10-16 05:58:00,566 INFO L185 Difference]: Start difference. First operand has 99 places, 100 transitions, 676 flow. Second operand 9 states and 1278 transitions. [2020-10-16 05:58:00,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 832 flow [2020-10-16 05:58:00,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 108 transitions, 770 flow, removed 6 selfloop flow, removed 6 redundant places. [2020-10-16 05:58:00,673 INFO L241 Difference]: Finished difference. Result has 103 places, 100 transitions, 731 flow [2020-10-16 05:58:00,673 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=731, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2020-10-16 05:58:00,673 INFO L342 CegarLoopForPetriNet]: 72 programPoint places, 31 predicate places. [2020-10-16 05:58:00,674 INFO L481 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 731 flow [2020-10-16 05:58:00,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 05:58:00,674 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:58:00,674 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:58:00,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-16 05:58:00,875 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:58:00,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:58:00,875 INFO L82 PathProgramCache]: Analyzing trace with hash -967832978, now seen corresponding path program 1 times [2020-10-16 05:58:00,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:58:00,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78062982] [2020-10-16 05:58:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:58:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:58:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-16 05:58:01,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78062982] [2020-10-16 05:58:01,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990524916] [2020-10-16 05:58:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:58:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:58:02,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-16 05:58:02,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:58:02,057 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-10-16 05:58:02,058 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 05:58:02,063 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 05:58:02,063 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 05:58:02,063 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-10-16 05:58:02,102 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2020-10-16 05:58:02,118 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 05:58:02,118 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 63 [2020-10-16 05:58:02,121 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 05:58:02,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 05:58:02,123 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-16 05:58:02,141 INFO L625 ElimStorePlain]: treesize reduction 33, result has 36.5 percent of original size [2020-10-16 05:58:02,141 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-16 05:58:02,149 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 05:58:02,149 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 05:58:02,149 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:36, output treesize:25 [2020-10-16 05:58:02,186 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 39 [2020-10-16 05:58:02,249 INFO L350 Elim1Store]: treesize reduction 10, result has 87.7 percent of original size [2020-10-16 05:58:02,250 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 126 [2020-10-16 05:58:02,251 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 05:58:02,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 05:58:02,252 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 05:58:02,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 05:58:02,254 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-16 05:58:02,304 INFO L625 ElimStorePlain]: treesize reduction 92, result has 23.3 percent of original size [2020-10-16 05:58:02,305 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-16 05:58:02,314 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 05:58:02,314 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 05:58:02,314 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:52, output treesize:34 [2020-10-16 05:58:02,363 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 53 [2020-10-16 05:58:02,446 INFO L350 Elim1Store]: treesize reduction 32, result has 77.5 percent of original size [2020-10-16 05:58:02,447 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 189 [2020-10-16 05:58:02,448 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 05:58:02,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 05:58:02,449 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 05:58:02,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 05:58:02,453 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 05:58:02,453 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 05:58:02,454 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-16 05:58:02,518 INFO L625 ElimStorePlain]: treesize reduction 133, result has 21.8 percent of original size [2020-10-16 05:58:02,518 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-16 05:58:02,533 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 05:58:02,534 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 05:58:02,534 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:68, output treesize:43 [2020-10-16 05:58:02,605 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 67 [2020-10-16 05:58:02,708 INFO L350 Elim1Store]: treesize reduction 66, result has 69.3 percent of original size [2020-10-16 05:58:02,709 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 119 treesize of output 252 [2020-10-16 05:58:02,710 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 05:58:02,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 05:58:02,712 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 05:58:02,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 05:58:02,714 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 05:58:02,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 05:58:02,715 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-16 05:58:02,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 05:58:02,717 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-10-16 05:58:02,815 INFO L625 ElimStorePlain]: treesize reduction 194, result has 19.2 percent of original size [2020-10-16 05:58:02,815 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-16 05:58:02,829 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 05:58:02,831 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-16 05:58:02,831 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:84, output treesize:52 [2020-10-16 05:58:03,219 INFO L350 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2020-10-16 05:58:03,219 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 80 treesize of output 24 [2020-10-16 05:58:03,220 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-16 05:58:03,223 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-16 05:58:03,223 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-16 05:58:03,223 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:80, output treesize:3 [2020-10-16 05:58:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-16 05:58:03,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:58:03,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 26 [2020-10-16 05:58:03,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479820484] [2020-10-16 05:58:03,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-16 05:58:03,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:58:03,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-16 05:58:03,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2020-10-16 05:58:03,252 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 203 [2020-10-16 05:58:03,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 100 transitions, 731 flow. Second operand 28 states. [2020-10-16 05:58:03,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:58:03,254 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 203 [2020-10-16 05:58:03,254 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:58:16,754 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 47