/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/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 14:48:00,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 14:48:00,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 14:48:00,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 14:48:00,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 14:48:00,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 14:48:00,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 14:48:00,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 14:48:00,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 14:48:00,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 14:48:00,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 14:48:00,819 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 14:48:00,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 14:48:00,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 14:48:00,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 14:48:00,826 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 14:48:00,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 14:48:00,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 14:48:00,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 14:48:00,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 14:48:00,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 14:48:00,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 14:48:00,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 14:48:00,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 14:48:00,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 14:48:00,852 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 14:48:00,853 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 14:48:00,855 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 14:48:00,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 14:48:00,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 14:48:00,857 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 14:48:00,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 14:48:00,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 14:48:00,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 14:48:00,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 14:48:00,865 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 14:48:00,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 14:48:00,866 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 14:48:00,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 14:48:00,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 14:48:00,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 14:48:00,871 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 14:48:00,910 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 14:48:00,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 14:48:00,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 14:48:00,912 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 14:48:00,912 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 14:48:00,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 14:48:00,913 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 14:48:00,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 14:48:00,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 14:48:00,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 14:48:00,913 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 14:48:00,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 14:48:00,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 14:48:00,914 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 14:48:00,914 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 14:48:00,914 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 14:48:00,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 14:48:00,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 14:48:00,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 14:48:00,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 14:48:00,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 14:48:00,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 14:48:00,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 14:48:00,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 14:48:00,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 14:48:00,916 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 14:48:00,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 14:48:00,917 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 14:48:00,917 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 14:48:00,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 14:48:01,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 14:48:01,246 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 14:48:01,250 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 14:48:01,252 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 14:48:01,252 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 14:48:01,253 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-09 14:48:01,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08e8750c/dd1c57d6b211419aba073b89eb112008/FLAGce2dc178c [2020-10-09 14:48:01,852 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 14:48:01,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-10-09 14:48:01,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08e8750c/dd1c57d6b211419aba073b89eb112008/FLAGce2dc178c [2020-10-09 14:48:02,137 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08e8750c/dd1c57d6b211419aba073b89eb112008 [2020-10-09 14:48:02,145 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 14:48:02,147 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 14:48:02,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 14:48:02,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 14:48:02,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 14:48:02,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:48:02" (1/1) ... [2020-10-09 14:48:02,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c1fd713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:48:02, skipping insertion in model container [2020-10-09 14:48:02,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 02:48:02" (1/1) ... [2020-10-09 14:48:02,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 14:48:02,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 14:48:02,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:48:02,653 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 14:48:02,727 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 14:48:02,814 INFO L208 MainTranslator]: Completed translation [2020-10-09 14:48:02,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:48:02 WrapperNode [2020-10-09 14:48:02,816 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 14:48:02,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 14:48:02,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 14:48:02,817 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 14:48:02,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:48:02" (1/1) ... [2020-10-09 14:48:02,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:48:02" (1/1) ... [2020-10-09 14:48:02,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 14:48:02,880 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 14:48:02,880 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 14:48:02,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 14:48:02,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:48:02" (1/1) ... [2020-10-09 14:48:02,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:48:02" (1/1) ... [2020-10-09 14:48:02,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:48:02" (1/1) ... [2020-10-09 14:48:02,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:48:02" (1/1) ... [2020-10-09 14:48:02,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:48:02" (1/1) ... [2020-10-09 14:48:02,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:48:02" (1/1) ... [2020-10-09 14:48:02,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:48:02" (1/1) ... [2020-10-09 14:48:02,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 14:48:02,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 14:48:02,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 14:48:02,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 14:48:02,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:48:02" (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 [2020-10-09 14:48:02,984 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-09 14:48:02,984 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-09 14:48:02,984 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-09 14:48:02,984 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-09 14:48:02,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 14:48:02,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 14:48:02,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 14:48:02,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 14:48:02,986 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 14:48:02,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 14:48:02,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 14:48:02,988 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 14:48:03,267 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 14:48:03,268 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-09 14:48:03,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:48:03 BoogieIcfgContainer [2020-10-09 14:48:03,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 14:48:03,271 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 14:48:03,271 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 14:48:03,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 14:48:03,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 02:48:02" (1/3) ... [2020-10-09 14:48:03,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cf68e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:48:03, skipping insertion in model container [2020-10-09 14:48:03,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 02:48:02" (2/3) ... [2020-10-09 14:48:03,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cf68e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 02:48:03, skipping insertion in model container [2020-10-09 14:48:03,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 02:48:03" (3/3) ... [2020-10-09 14:48:03,278 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-10-09 14:48:03,291 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 14:48:03,298 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 14:48:03,299 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 14:48:03,323 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,323 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,324 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,324 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,325 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,325 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,325 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,326 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,326 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,326 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,326 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,327 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,327 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,327 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,328 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,328 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,328 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,328 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,329 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,329 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,329 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,329 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,330 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,330 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,330 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,331 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,331 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,331 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,335 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,335 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,335 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,335 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,336 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,336 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,348 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,348 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,349 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,349 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 14:48:03,364 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 14:48:03,381 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 14:48:03,381 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 14:48:03,382 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 14:48:03,382 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 14:48:03,382 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 14:48:03,382 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 14:48:03,382 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 14:48:03,382 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 14:48:03,393 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-09 14:48:03,429 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-09 14:48:03,430 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:48:03,435 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-09 14:48:03,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 120 flow [2020-10-09 14:48:03,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 53 transitions, 112 flow [2020-10-09 14:48:03,458 INFO L129 PetriNetUnfolder]: 4/43 cut-off events. [2020-10-09 14:48:03,458 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:48:03,459 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:48:03,460 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 14:48:03,460 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:48:03,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:48:03,466 INFO L82 PathProgramCache]: Analyzing trace with hash 305903693, now seen corresponding path program 1 times [2020-10-09 14:48:03,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:48:03,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660346432] [2020-10-09 14:48:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 14:48:03,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:48:03,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 14:48:03,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:03,701 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:03,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:03,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:03,822 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:03,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660346432] [2020-10-09 14:48:03,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:48:03,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-09 14:48:03,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575896083] [2020-10-09 14:48:03,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 14:48:03,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:48:03,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 14:48:03,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-09 14:48:04,009 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:48:04,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 112 flow. Second operand 9 states. [2020-10-09 14:48:04,014 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:48:04,014 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:48:04,015 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:48:04,366 INFO L129 PetriNetUnfolder]: 73/340 cut-off events. [2020-10-09 14:48:04,366 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 14:48:04,369 INFO L80 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 340 events. 73/340 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1887 event pairs, 0 based on Foata normal form. 78/390 useless extension candidates. Maximal degree in co-relation 444. Up to 45 conditions per place. [2020-10-09 14:48:04,372 INFO L132 encePairwiseOnDemand]: 44/55 looper letters, 17 selfloop transitions, 16 changer transitions 18/92 dead transitions. [2020-10-09 14:48:04,373 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 292 flow [2020-10-09 14:48:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 14:48:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-09 14:48:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 775 transitions. [2020-10-09 14:48:04,393 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8806818181818182 [2020-10-09 14:48:04,394 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 775 transitions. [2020-10-09 14:48:04,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 775 transitions. [2020-10-09 14:48:04,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:48:04,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 775 transitions. [2020-10-09 14:48:04,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-09 14:48:04,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-09 14:48:04,418 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-09 14:48:04,420 INFO L185 Difference]: Start difference. First operand has 55 places, 53 transitions, 112 flow. Second operand 16 states and 775 transitions. [2020-10-09 14:48:04,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 292 flow [2020-10-09 14:48:04,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-09 14:48:04,431 INFO L241 Difference]: Finished difference. Result has 82 places, 67 transitions, 250 flow [2020-10-09 14:48:04,434 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=250, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2020-10-09 14:48:04,435 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 27 predicate places. [2020-10-09 14:48:04,435 INFO L481 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 250 flow [2020-10-09 14:48:04,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 14:48:04,436 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:48:04,436 INFO L255 CegarLoopForPetriNet]: trace histogram [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, 1] [2020-10-09 14:48:04,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 14:48:04,647 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:48:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:48:04,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1723906183, now seen corresponding path program 1 times [2020-10-09 14:48:04,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:48:04,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253404204] [2020-10-09 14:48:04,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 14:48:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:48:04,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 14:48:04,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:04,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:04,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:04,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:04,783 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:04,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253404204] [2020-10-09 14:48:04,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:48:04,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 11 [2020-10-09 14:48:04,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667291181] [2020-10-09 14:48:04,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 14:48:04,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:48:04,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 14:48:04,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-09 14:48:05,051 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:48:05,052 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 250 flow. Second operand 11 states. [2020-10-09 14:48:05,052 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:48:05,052 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:48:05,052 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:48:05,528 INFO L129 PetriNetUnfolder]: 96/452 cut-off events. [2020-10-09 14:48:05,528 INFO L130 PetriNetUnfolder]: For 1731/1846 co-relation queries the response was YES. [2020-10-09 14:48:05,533 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1209 conditions, 452 events. 96/452 cut-off events. For 1731/1846 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2535 event pairs, 1 based on Foata normal form. 25/434 useless extension candidates. Maximal degree in co-relation 1171. Up to 68 conditions per place. [2020-10-09 14:48:05,537 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 31 selfloop transitions, 42 changer transitions 43/150 dead transitions. [2020-10-09 14:48:05,537 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 150 transitions, 1174 flow [2020-10-09 14:48:05,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 14:48:05,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-09 14:48:05,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1062 transitions. [2020-10-09 14:48:05,543 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8395256916996048 [2020-10-09 14:48:05,544 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1062 transitions. [2020-10-09 14:48:05,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1062 transitions. [2020-10-09 14:48:05,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:48:05,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1062 transitions. [2020-10-09 14:48:05,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-09 14:48:05,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-09 14:48:05,552 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-09 14:48:05,552 INFO L185 Difference]: Start difference. First operand has 82 places, 67 transitions, 250 flow. Second operand 23 states and 1062 transitions. [2020-10-09 14:48:05,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 150 transitions, 1174 flow [2020-10-09 14:48:05,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 150 transitions, 1098 flow, removed 37 selfloop flow, removed 5 redundant places. [2020-10-09 14:48:05,569 INFO L241 Difference]: Finished difference. Result has 113 places, 92 transitions, 713 flow [2020-10-09 14:48:05,569 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=713, PETRI_PLACES=113, PETRI_TRANSITIONS=92} [2020-10-09 14:48:05,570 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2020-10-09 14:48:05,570 INFO L481 AbstractCegarLoop]: Abstraction has has 113 places, 92 transitions, 713 flow [2020-10-09 14:48:05,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 14:48:05,571 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:48:05,571 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 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, 1, 1] [2020-10-09 14:48:05,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 14:48:05,785 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:48:05,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:48:05,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1269320736, now seen corresponding path program 1 times [2020-10-09 14:48:05,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:48:05,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992368837] [2020-10-09 14:48:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 14:48:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:48:05,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:48:05,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:05,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:05,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:05,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:05,969 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:06,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992368837] [2020-10-09 14:48:06,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [609194736] [2020-10-09 14:48:06,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:06,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:48:06,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:48:06,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:06,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:06,124 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:06,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:06,136 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:06,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833911716] [2020-10-09 14:48:06,149 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 [2020-10-09 14:48:06,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:48:06,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 14:48:06,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:06,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:06,208 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:06,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:06,215 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:06,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:48:06,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 13 [2020-10-09 14:48:06,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49444995] [2020-10-09 14:48:06,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 14:48:06,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:48:06,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 14:48:06,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-09 14:48:06,389 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:48:06,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 92 transitions, 713 flow. Second operand 13 states. [2020-10-09 14:48:06,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:48:06,391 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:48:06,391 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:48:07,047 INFO L129 PetriNetUnfolder]: 98/500 cut-off events. [2020-10-09 14:48:07,047 INFO L130 PetriNetUnfolder]: For 4940/5111 co-relation queries the response was YES. [2020-10-09 14:48:07,052 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1786 conditions, 500 events. 98/500 cut-off events. For 4940/5111 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2760 event pairs, 2 based on Foata normal form. 42/490 useless extension candidates. Maximal degree in co-relation 1732. Up to 78 conditions per place. [2020-10-09 14:48:07,059 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 44 selfloop transitions, 56 changer transitions 25/159 dead transitions. [2020-10-09 14:48:07,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 159 transitions, 2058 flow [2020-10-09 14:48:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 14:48:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-09 14:48:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1192 transitions. [2020-10-09 14:48:07,067 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8335664335664336 [2020-10-09 14:48:07,067 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1192 transitions. [2020-10-09 14:48:07,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1192 transitions. [2020-10-09 14:48:07,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:48:07,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1192 transitions. [2020-10-09 14:48:07,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-09 14:48:07,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-09 14:48:07,077 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-09 14:48:07,077 INFO L185 Difference]: Start difference. First operand has 113 places, 92 transitions, 713 flow. Second operand 26 states and 1192 transitions. [2020-10-09 14:48:07,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 159 transitions, 2058 flow [2020-10-09 14:48:07,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1606 flow, removed 211 selfloop flow, removed 11 redundant places. [2020-10-09 14:48:07,107 INFO L241 Difference]: Finished difference. Result has 127 places, 114 transitions, 1030 flow [2020-10-09 14:48:07,109 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1030, PETRI_PLACES=127, PETRI_TRANSITIONS=114} [2020-10-09 14:48:07,109 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2020-10-09 14:48:07,110 INFO L481 AbstractCegarLoop]: Abstraction has has 127 places, 114 transitions, 1030 flow [2020-10-09 14:48:07,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 14:48:07,110 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:48:07,110 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1] [2020-10-09 14:48:07,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3,5 cvc4 --incremental --print-success --lang smt --rewrite-divk,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:48:07,725 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:48:07,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:48:07,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1653313534, now seen corresponding path program 1 times [2020-10-09 14:48:07,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:48:07,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1930086616] [2020-10-09 14:48:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-09 14:48:07,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:48:07,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 14:48:07,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:07,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:07,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:07,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:07,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:07,903 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:07,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1930086616] [2020-10-09 14:48:07,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1642466858] [2020-10-09 14:48:07,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:48:08,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 14:48:08,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:08,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:08,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:08,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:08,085 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:08,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:08,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351667263] [2020-10-09 14:48:08,096 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 [2020-10-09 14:48:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:48:08,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 14:48:08,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:08,151 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:08,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:08,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:08,164 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:08,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:48:08,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 15 [2020-10-09 14:48:08,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212319614] [2020-10-09 14:48:08,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 14:48:08,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:48:08,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 14:48:08,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 14:48:08,314 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:48:08,315 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 114 transitions, 1030 flow. Second operand 15 states. [2020-10-09 14:48:08,315 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:48:08,315 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:48:08,315 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:48:09,081 INFO L129 PetriNetUnfolder]: 111/618 cut-off events. [2020-10-09 14:48:09,082 INFO L130 PetriNetUnfolder]: For 8357/8454 co-relation queries the response was YES. [2020-10-09 14:48:09,086 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2387 conditions, 618 events. 111/618 cut-off events. For 8357/8454 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 3476 event pairs, 0 based on Foata normal form. 50/607 useless extension candidates. Maximal degree in co-relation 2323. Up to 78 conditions per place. [2020-10-09 14:48:09,091 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 36 selfloop transitions, 86 changer transitions 26/182 dead transitions. [2020-10-09 14:48:09,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 182 transitions, 2905 flow [2020-10-09 14:48:09,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 14:48:09,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-09 14:48:09,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1421 transitions. [2020-10-09 14:48:09,097 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8334310850439882 [2020-10-09 14:48:09,097 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1421 transitions. [2020-10-09 14:48:09,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1421 transitions. [2020-10-09 14:48:09,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:48:09,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1421 transitions. [2020-10-09 14:48:09,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-09 14:48:09,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-09 14:48:09,106 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-09 14:48:09,106 INFO L185 Difference]: Start difference. First operand has 127 places, 114 transitions, 1030 flow. Second operand 31 states and 1421 transitions. [2020-10-09 14:48:09,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 182 transitions, 2905 flow [2020-10-09 14:48:09,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 182 transitions, 2478 flow, removed 205 selfloop flow, removed 10 redundant places. [2020-10-09 14:48:09,134 INFO L241 Difference]: Finished difference. Result has 157 places, 142 transitions, 1593 flow [2020-10-09 14:48:09,134 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1593, PETRI_PLACES=157, PETRI_TRANSITIONS=142} [2020-10-09 14:48:09,135 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 102 predicate places. [2020-10-09 14:48:09,135 INFO L481 AbstractCegarLoop]: Abstraction has has 157 places, 142 transitions, 1593 flow [2020-10-09 14:48:09,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 14:48:09,135 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:48:09,135 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1, 1] [2020-10-09 14:48:09,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 mathsat -unsat_core_generation=3,8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:09,749 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:48:09,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:48:09,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1286568708, now seen corresponding path program 2 times [2020-10-09 14:48:09,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:48:09,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297585275] [2020-10-09 14:48:09,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-10-09 14:48:09,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:48:09,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:09,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 14:48:09,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:09,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:09,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:10,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297585275] [2020-10-09 14:48:10,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1471793805] [2020-10-09 14:48:10,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:10,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:48:10,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:10,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 14:48:10,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:10,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:10,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:10,219 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:10,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:10,223 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:10,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457082866] [2020-10-09 14:48:10,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-10-09 14:48:10,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:48:10,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:10,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-09 14:48:10,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:10,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:10,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:10,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:10,346 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:10,373 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:10,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:48:10,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 24 [2020-10-09 14:48:10,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884308663] [2020-10-09 14:48:10,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 14:48:10,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:48:10,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 14:48:10,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2020-10-09 14:48:10,442 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:48:10,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 142 transitions, 1593 flow. Second operand 24 states. [2020-10-09 14:48:10,443 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:48:10,443 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:48:10,443 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:48:11,839 INFO L129 PetriNetUnfolder]: 147/817 cut-off events. [2020-10-09 14:48:11,840 INFO L130 PetriNetUnfolder]: For 16115/16241 co-relation queries the response was YES. [2020-10-09 14:48:11,847 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3561 conditions, 817 events. 147/817 cut-off events. For 16115/16241 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4498 event pairs, 0 based on Foata normal form. 49/785 useless extension candidates. Maximal degree in co-relation 3486. Up to 101 conditions per place. [2020-10-09 14:48:11,854 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 60 selfloop transitions, 122 changer transitions 29/245 dead transitions. [2020-10-09 14:48:11,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 245 transitions, 4781 flow [2020-10-09 14:48:11,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-09 14:48:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-09 14:48:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2153 transitions. [2020-10-09 14:48:11,861 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8328820116054159 [2020-10-09 14:48:11,861 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2153 transitions. [2020-10-09 14:48:11,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2153 transitions. [2020-10-09 14:48:11,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:48:11,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2153 transitions. [2020-10-09 14:48:11,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-09 14:48:11,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-09 14:48:11,872 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-09 14:48:11,872 INFO L185 Difference]: Start difference. First operand has 157 places, 142 transitions, 1593 flow. Second operand 47 states and 2153 transitions. [2020-10-09 14:48:11,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 245 transitions, 4781 flow [2020-10-09 14:48:11,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 245 transitions, 3805 flow, removed 438 selfloop flow, removed 21 redundant places. [2020-10-09 14:48:11,918 INFO L241 Difference]: Finished difference. Result has 197 places, 186 transitions, 2238 flow [2020-10-09 14:48:11,918 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1141, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=2238, PETRI_PLACES=197, PETRI_TRANSITIONS=186} [2020-10-09 14:48:11,919 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 142 predicate places. [2020-10-09 14:48:11,919 INFO L481 AbstractCegarLoop]: Abstraction has has 197 places, 186 transitions, 2238 flow [2020-10-09 14:48:11,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 14:48:11,919 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:48:11,920 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 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] [2020-10-09 14:48:12,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:12,535 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:48:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:48:12,536 INFO L82 PathProgramCache]: Analyzing trace with hash -226858967, now seen corresponding path program 3 times [2020-10-09 14:48:12,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:48:12,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [345162635] [2020-10-09 14:48:12,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-10-09 14:48:12,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-09 14:48:12,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:12,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:48:12,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:12,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:12,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:12,899 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:12,927 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:12,956 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:12,980 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,004 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,028 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,052 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,076 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,101 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,127 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,152 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,186 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,216 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:13,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [345162635] [2020-10-09 14:48:13,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [693521770] [2020-10-09 14:48:13,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:13,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-09 14:48:13,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:13,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:48:13,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:13,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:13,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:13,461 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,463 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,471 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,473 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,475 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,477 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,483 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,485 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,487 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,489 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,491 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,496 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,498 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:13,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618033666] [2020-10-09 14:48:13,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-10-09 14:48:13,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-09 14:48:13,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:13,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:48:13,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:13,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:13,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:13,626 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,628 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,630 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,632 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,635 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,637 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,639 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,641 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,644 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,647 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,649 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,651 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,653 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:13,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:48:13,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 19] total 35 [2020-10-09 14:48:13,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134699485] [2020-10-09 14:48:13,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-09 14:48:13,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:48:13,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-09 14:48:13,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 14:48:14,033 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:48:14,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 186 transitions, 2238 flow. Second operand 35 states. [2020-10-09 14:48:14,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:48:14,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:48:14,035 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:48:15,601 INFO L129 PetriNetUnfolder]: 221/1434 cut-off events. [2020-10-09 14:48:15,602 INFO L130 PetriNetUnfolder]: For 50134/50227 co-relation queries the response was YES. [2020-10-09 14:48:15,618 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6886 conditions, 1434 events. 221/1434 cut-off events. For 50134/50227 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 8796 event pairs, 0 based on Foata normal form. 46/1327 useless extension candidates. Maximal degree in co-relation 6798. Up to 168 conditions per place. [2020-10-09 14:48:15,631 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 147 selfloop transitions, 113 changer transitions 50/344 dead transitions. [2020-10-09 14:48:15,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 344 transitions, 8294 flow [2020-10-09 14:48:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-09 14:48:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-09 14:48:15,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 2559 transitions. [2020-10-09 14:48:15,636 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8308441558441558 [2020-10-09 14:48:15,637 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 2559 transitions. [2020-10-09 14:48:15,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 2559 transitions. [2020-10-09 14:48:15,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:48:15,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 2559 transitions. [2020-10-09 14:48:15,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 57 states. [2020-10-09 14:48:15,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 57 states. [2020-10-09 14:48:15,645 INFO L81 ComplementDD]: Finished complementDD. Result 57 states. [2020-10-09 14:48:15,646 INFO L185 Difference]: Start difference. First operand has 197 places, 186 transitions, 2238 flow. Second operand 56 states and 2559 transitions. [2020-10-09 14:48:15,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 344 transitions, 8294 flow [2020-10-09 14:48:15,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 344 transitions, 6421 flow, removed 903 selfloop flow, removed 22 redundant places. [2020-10-09 14:48:15,814 INFO L241 Difference]: Finished difference. Result has 253 places, 246 transitions, 2963 flow [2020-10-09 14:48:15,814 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1551, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=2963, PETRI_PLACES=253, PETRI_TRANSITIONS=246} [2020-10-09 14:48:15,815 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 198 predicate places. [2020-10-09 14:48:15,815 INFO L481 AbstractCegarLoop]: Abstraction has has 253 places, 246 transitions, 2963 flow [2020-10-09 14:48:15,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-09 14:48:15,815 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:48:15,815 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 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] [2020-10-09 14:48:16,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3,14 cvc4 --incremental --print-success --lang smt --rewrite-divk,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 14:48:16,428 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:48:16,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:48:16,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1060204081, now seen corresponding path program 4 times [2020-10-09 14:48:16,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:48:16,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946247861] [2020-10-09 14:48:16,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-10-09 14:48:16,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:48:16,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:16,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:48:16,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:16,512 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:16,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:16,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:16,704 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:16,732 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:16,757 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:16,785 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:16,807 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:16,830 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:16,853 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:16,877 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:16,910 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:16,937 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:16,988 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,113 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:17,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946247861] [2020-10-09 14:48:17,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1326032851] [2020-10-09 14:48:17,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:17,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:48:17,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:17,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:48:17,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:17,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:17,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:17,267 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:17,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:17,269 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,277 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,279 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,281 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,283 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,285 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,287 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,289 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,291 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,293 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,295 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:17,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394725856] [2020-10-09 14:48:17,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2020-10-09 14:48:17,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 14:48:17,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:17,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-09 14:48:17,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:17,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:17,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:17,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:17,400 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,402 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,409 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,412 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,419 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,421 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,424 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,426 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,428 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,430 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,431 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:17,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:48:17,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 19] total 35 [2020-10-09 14:48:17,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721825472] [2020-10-09 14:48:17,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-09 14:48:17,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:48:17,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-09 14:48:17,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 14:48:18,171 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:48:18,173 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 246 transitions, 2963 flow. Second operand 35 states. [2020-10-09 14:48:18,173 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:48:18,173 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:48:18,173 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:48:20,307 INFO L129 PetriNetUnfolder]: 278/1820 cut-off events. [2020-10-09 14:48:20,308 INFO L130 PetriNetUnfolder]: For 127572/128213 co-relation queries the response was YES. [2020-10-09 14:48:20,323 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10771 conditions, 1820 events. 278/1820 cut-off events. For 127572/128213 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 12282 event pairs, 0 based on Foata normal form. 55/1686 useless extension candidates. Maximal degree in co-relation 10662. Up to 224 conditions per place. [2020-10-09 14:48:20,336 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 101 selfloop transitions, 216 changer transitions 50/401 dead transitions. [2020-10-09 14:48:20,336 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 401 transitions, 11319 flow [2020-10-09 14:48:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-09 14:48:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-09 14:48:20,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 2835 transitions. [2020-10-09 14:48:20,341 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8313782991202346 [2020-10-09 14:48:20,341 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 2835 transitions. [2020-10-09 14:48:20,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 2835 transitions. [2020-10-09 14:48:20,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:48:20,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 2835 transitions. [2020-10-09 14:48:20,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 63 states. [2020-10-09 14:48:20,349 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 63 states. [2020-10-09 14:48:20,349 INFO L81 ComplementDD]: Finished complementDD. Result 63 states. [2020-10-09 14:48:20,350 INFO L185 Difference]: Start difference. First operand has 253 places, 246 transitions, 2963 flow. Second operand 62 states and 2835 transitions. [2020-10-09 14:48:20,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 401 transitions, 11319 flow [2020-10-09 14:48:20,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 401 transitions, 9299 flow, removed 970 selfloop flow, removed 28 redundant places. [2020-10-09 14:48:20,519 INFO L241 Difference]: Finished difference. Result has 304 places, 304 transitions, 4351 flow [2020-10-09 14:48:20,520 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=4351, PETRI_PLACES=304, PETRI_TRANSITIONS=304} [2020-10-09 14:48:20,520 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 249 predicate places. [2020-10-09 14:48:20,520 INFO L481 AbstractCegarLoop]: Abstraction has has 304 places, 304 transitions, 4351 flow [2020-10-09 14:48:20,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-09 14:48:20,520 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:48:20,520 INFO L255 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 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] [2020-10-09 14:48:21,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:21,122 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:48:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:48:21,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2077891861, now seen corresponding path program 5 times [2020-10-09 14:48:21,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:48:21,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [166290818] [2020-10-09 14:48:21,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-10-09 14:48:21,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 14:48:21,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:21,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:48:21,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:21,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:21,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:21,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:21,368 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:21,385 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:21,405 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:21,424 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:21,463 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:21,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [166290818] [2020-10-09 14:48:21,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1147599994] [2020-10-09 14:48:21,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:21,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 14:48:21,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:21,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:48:21,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:21,865 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:21,870 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:21,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:21,885 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:21,887 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:21,889 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:21,891 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:21,893 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:21,911 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:21,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011196594] [2020-10-09 14:48:21,912 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-10-09 14:48:21,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-09 14:48:21,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:21,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-09 14:48:21,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:21,995 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:21,999 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:22,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:22,012 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:22,014 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:22,015 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:22,017 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:22,019 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:22,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:48:22,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 19] total 35 [2020-10-09 14:48:22,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719709200] [2020-10-09 14:48:22,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-09 14:48:22,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:48:22,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-09 14:48:22,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 14:48:22,968 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:48:22,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 304 transitions, 4351 flow. Second operand 35 states. [2020-10-09 14:48:22,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:48:22,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:48:22,969 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:48:26,134 INFO L129 PetriNetUnfolder]: 339/2307 cut-off events. [2020-10-09 14:48:26,134 INFO L130 PetriNetUnfolder]: For 249036/249550 co-relation queries the response was YES. [2020-10-09 14:48:26,155 INFO L80 FinitePrefix]: Finished finitePrefix Result has 15927 conditions, 2307 events. 339/2307 cut-off events. For 249036/249550 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 16510 event pairs, 0 based on Foata normal form. 64/2129 useless extension candidates. Maximal degree in co-relation 15799. Up to 272 conditions per place. [2020-10-09 14:48:26,175 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 81 selfloop transitions, 299 changer transitions 53/467 dead transitions. [2020-10-09 14:48:26,175 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 467 transitions, 16600 flow [2020-10-09 14:48:26,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-09 14:48:26,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-09 14:48:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 3434 transitions. [2020-10-09 14:48:26,180 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8324848484848485 [2020-10-09 14:48:26,181 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 3434 transitions. [2020-10-09 14:48:26,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 3434 transitions. [2020-10-09 14:48:26,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:48:26,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 3434 transitions. [2020-10-09 14:48:26,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 76 states. [2020-10-09 14:48:26,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 76 states. [2020-10-09 14:48:26,191 INFO L81 ComplementDD]: Finished complementDD. Result 76 states. [2020-10-09 14:48:26,191 INFO L185 Difference]: Start difference. First operand has 304 places, 304 transitions, 4351 flow. Second operand 75 states and 3434 transitions. [2020-10-09 14:48:26,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 467 transitions, 16600 flow [2020-10-09 14:48:26,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 467 transitions, 13654 flow, removed 1398 selfloop flow, removed 34 redundant places. [2020-10-09 14:48:26,521 INFO L241 Difference]: Finished difference. Result has 370 places, 364 transitions, 6274 flow [2020-10-09 14:48:26,522 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=3313, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=6274, PETRI_PLACES=370, PETRI_TRANSITIONS=364} [2020-10-09 14:48:26,522 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 315 predicate places. [2020-10-09 14:48:26,522 INFO L481 AbstractCegarLoop]: Abstraction has has 370 places, 364 transitions, 6274 flow [2020-10-09 14:48:26,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-09 14:48:26,522 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:48:26,522 INFO L255 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 10, 10, 9, 9, 9, 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] [2020-10-09 14:48:27,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:27,124 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:48:27,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:48:27,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1406830715, now seen corresponding path program 6 times [2020-10-09 14:48:27,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:48:27,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133591301] [2020-10-09 14:48:27,126 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2020-10-09 14:48:27,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-09 14:48:27,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:27,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 14:48:27,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:27,575 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:27,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:27,626 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:28,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133591301] [2020-10-09 14:48:28,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [756826064] [2020-10-09 14:48:28,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:28,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-09 14:48:28,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:28,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 14:48:28,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:28,402 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:28,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:28,419 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:28,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732381383] [2020-10-09 14:48:28,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-10-09 14:48:28,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-10-09 14:48:28,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:28,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 27 conjunts are in the unsatisfiable core [2020-10-09 14:48:28,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:28,526 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:28,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:28,547 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 0 proven. 443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:28,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:48:28,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26, 26, 26, 26] total 49 [2020-10-09 14:48:28,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223662582] [2020-10-09 14:48:28,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-09 14:48:28,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:48:28,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-09 14:48:28,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=1811, Unknown=0, NotChecked=0, Total=2352 [2020-10-09 14:48:30,356 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:48:30,358 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 364 transitions, 6274 flow. Second operand 49 states. [2020-10-09 14:48:30,358 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:48:30,358 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:48:30,358 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:48:35,759 INFO L129 PetriNetUnfolder]: 496/3235 cut-off events. [2020-10-09 14:48:35,760 INFO L130 PetriNetUnfolder]: For 662388/664324 co-relation queries the response was YES. [2020-10-09 14:48:35,821 INFO L80 FinitePrefix]: Finished finitePrefix Result has 31723 conditions, 3235 events. 496/3235 cut-off events. For 662388/664324 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 23083 event pairs, 0 based on Foata normal form. 82/2982 useless extension candidates. Maximal degree in co-relation 31568. Up to 407 conditions per place. [2020-10-09 14:48:35,871 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 121 selfloop transitions, 431 changer transitions 77/663 dead transitions. [2020-10-09 14:48:35,872 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 663 transitions, 34020 flow [2020-10-09 14:48:35,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-10-09 14:48:35,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 14:48:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 5409 transitions. [2020-10-09 14:48:35,879 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8334360554699538 [2020-10-09 14:48:35,879 INFO L72 ComplementDD]: Start complementDD. Operand 118 states and 5409 transitions. [2020-10-09 14:48:35,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 5409 transitions. [2020-10-09 14:48:35,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:48:35,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 118 states and 5409 transitions. [2020-10-09 14:48:35,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 119 states. [2020-10-09 14:48:35,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 119 states. [2020-10-09 14:48:35,894 INFO L81 ComplementDD]: Finished complementDD. Result 119 states. [2020-10-09 14:48:35,894 INFO L185 Difference]: Start difference. First operand has 370 places, 364 transitions, 6274 flow. Second operand 118 states and 5409 transitions. [2020-10-09 14:48:35,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 663 transitions, 34020 flow [2020-10-09 14:48:36,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 663 transitions, 26651 flow, removed 3570 selfloop flow, removed 38 redundant places. [2020-10-09 14:48:36,567 INFO L241 Difference]: Finished difference. Result has 504 places, 497 transitions, 11107 flow [2020-10-09 14:48:36,567 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=4297, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=118, PETRI_FLOW=11107, PETRI_PLACES=504, PETRI_TRANSITIONS=497} [2020-10-09 14:48:36,568 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 449 predicate places. [2020-10-09 14:48:36,568 INFO L481 AbstractCegarLoop]: Abstraction has has 504 places, 497 transitions, 11107 flow [2020-10-09 14:48:36,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-09 14:48:36,568 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:48:36,568 INFO L255 CegarLoopForPetriNet]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 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] [2020-10-09 14:48:37,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 mathsat -unsat_core_generation=3,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:37,170 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:48:37,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:48:37,170 INFO L82 PathProgramCache]: Analyzing trace with hash 50220859, now seen corresponding path program 7 times [2020-10-09 14:48:37,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:48:37,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999727411] [2020-10-09 14:48:37,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 25 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with mathsat -unsat_core_generation=3 [2020-10-09 14:48:37,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:48:37,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-09 14:48:37,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:37,876 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:37,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:37,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:38,018 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:38,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999727411] [2020-10-09 14:48:38,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [398033594] [2020-10-09 14:48:38,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:48:39,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:48:39,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-09 14:48:39,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:39,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:39,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:39,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:39,286 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:39,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92433973] [2020-10-09 14:48:39,919 INFO L93 rtionOrderModulation]: Changing assertion order to 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 [2020-10-09 14:48:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 14:48:39,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 44 conjunts are in the unsatisfiable core [2020-10-09 14:48:39,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:40,008 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:48:40,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:48:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:40,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:40,059 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:48:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1602 backedges. 0 proven. 1602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:48:40,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 14:48:40,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43, 43, 43, 43] total 47 [2020-10-09 14:48:40,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31795616] [2020-10-09 14:48:40,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-09 14:48:40,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:48:40,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-09 14:48:40,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1685, Unknown=0, NotChecked=0, Total=2162 [2020-10-09 14:48:42,752 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 55 [2020-10-09 14:48:42,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 497 transitions, 11107 flow. Second operand 47 states. [2020-10-09 14:48:42,754 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:48:42,754 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 55 [2020-10-09 14:48:42,754 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:48:45,275 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2020-10-09 14:48:48,089 INFO L129 PetriNetUnfolder]: 565/3980 cut-off events. [2020-10-09 14:48:48,090 INFO L130 PetriNetUnfolder]: For 1531134/1532168 co-relation queries the response was YES. [2020-10-09 14:48:48,150 INFO L80 FinitePrefix]: Finished finitePrefix Result has 46320 conditions, 3980 events. 565/3980 cut-off events. For 1531134/1532168 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 29359 event pairs, 2 based on Foata normal form. 66/3620 useless extension candidates. Maximal degree in co-relation 46109. Up to 513 conditions per place. [2020-10-09 14:48:48,208 INFO L132 encePairwiseOnDemand]: 48/55 looper letters, 122 selfloop transitions, 529 changer transitions 17/702 dead transitions. [2020-10-09 14:48:48,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 702 transitions, 35283 flow [2020-10-09 14:48:48,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-09 14:48:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-09 14:48:48,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 4147 transitions. [2020-10-09 14:48:48,214 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2020-10-09 14:48:48,214 INFO L72 ComplementDD]: Start complementDD. Operand 91 states and 4147 transitions. [2020-10-09 14:48:48,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 91 states and 4147 transitions. [2020-10-09 14:48:48,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:48:48,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 91 states and 4147 transitions. [2020-10-09 14:48:48,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 92 states. [2020-10-09 14:48:48,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 92 states. [2020-10-09 14:48:48,225 INFO L81 ComplementDD]: Finished complementDD. Result 92 states. [2020-10-09 14:48:48,226 INFO L185 Difference]: Start difference. First operand has 504 places, 497 transitions, 11107 flow. Second operand 91 states and 4147 transitions. [2020-10-09 14:48:48,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 702 transitions, 35283 flow [2020-10-09 14:48:50,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 702 transitions, 21686 flow, removed 6581 selfloop flow, removed 63 redundant places. [2020-10-09 14:48:50,513 INFO L241 Difference]: Finished difference. Result has 518 places, 606 transitions, 9467 flow [2020-10-09 14:48:50,514 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=6339, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=91, PETRI_FLOW=9467, PETRI_PLACES=518, PETRI_TRANSITIONS=606} [2020-10-09 14:48:50,514 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 463 predicate places. [2020-10-09 14:48:50,514 INFO L481 AbstractCegarLoop]: Abstraction has has 518 places, 606 transitions, 9467 flow [2020-10-09 14:48:50,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-09 14:48:50,514 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:48:50,514 INFO L255 CegarLoopForPetriNet]: trace histogram [21, 21, 20, 20, 20, 20, 20, 19, 19, 19, 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] [2020-10-09 14:48:51,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 cvc4 --incremental --print-success --lang smt --rewrite-divk,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 mathsat -unsat_core_generation=3 [2020-10-09 14:48:51,116 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:48:51,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:48:51,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1627734664, now seen corresponding path program 8 times [2020-10-09 14:48:51,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:48:51,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455734119] [2020-10-09 14:48:51,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 28 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with mathsat -unsat_core_generation=3 [2020-10-09 14:48:51,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 14:48:51,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:48:51,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-09 14:48:51,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:48:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1858 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-09 14:48:51,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:48:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1858 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-09 14:48:52,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455734119] [2020-10-09 14:48:52,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 14:48:52,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43, 43] imperfect sequences [] total 43 [2020-10-09 14:48:52,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197957250] [2020-10-09 14:48:52,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-09 14:48:52,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:48:52,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-09 14:48:52,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2020-10-09 14:48:53,026 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 55 [2020-10-09 14:48:53,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 606 transitions, 9467 flow. Second operand 43 states. [2020-10-09 14:48:53,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:48:53,028 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 55 [2020-10-09 14:48:53,028 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:49:14,369 INFO L129 PetriNetUnfolder]: 7420/37931 cut-off events. [2020-10-09 14:49:14,369 INFO L130 PetriNetUnfolder]: For 8603206/8603529 co-relation queries the response was YES. [2020-10-09 14:49:15,506 INFO L80 FinitePrefix]: Finished finitePrefix Result has 318325 conditions, 37931 events. 7420/37931 cut-off events. For 8603206/8603529 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 479555 event pairs, 1666 based on Foata normal form. 92/33615 useless extension candidates. Maximal degree in co-relation 318130. Up to 4955 conditions per place. [2020-10-09 14:49:15,596 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 22 selfloop transitions, 81 changer transitions 437/691 dead transitions. [2020-10-09 14:49:15,596 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 575 places, 691 transitions, 9264 flow [2020-10-09 14:49:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-09 14:49:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-09 14:49:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 2939 transitions. [2020-10-09 14:49:15,600 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8481962481962482 [2020-10-09 14:49:15,600 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 2939 transitions. [2020-10-09 14:49:15,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 2939 transitions. [2020-10-09 14:49:15,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:49:15,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 2939 transitions. [2020-10-09 14:49:15,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 64 states. [2020-10-09 14:49:15,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 64 states. [2020-10-09 14:49:15,608 INFO L81 ComplementDD]: Finished complementDD. Result 64 states. [2020-10-09 14:49:15,608 INFO L185 Difference]: Start difference. First operand has 518 places, 606 transitions, 9467 flow. Second operand 63 states and 2939 transitions. [2020-10-09 14:49:15,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 575 places, 691 transitions, 9264 flow [2020-10-09 14:49:26,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 691 transitions, 8281 flow, removed 301 selfloop flow, removed 41 redundant places. [2020-10-09 14:49:26,974 INFO L241 Difference]: Finished difference. Result has 535 places, 235 transitions, 2121 flow [2020-10-09 14:49:26,975 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=7883, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=2121, PETRI_PLACES=535, PETRI_TRANSITIONS=235} [2020-10-09 14:49:26,975 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 480 predicate places. [2020-10-09 14:49:26,975 INFO L481 AbstractCegarLoop]: Abstraction has has 535 places, 235 transitions, 2121 flow [2020-10-09 14:49:26,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-09 14:49:26,975 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 14:49:26,975 INFO L255 CegarLoopForPetriNet]: trace histogram [21, 21, 20, 20, 20, 20, 20, 19, 19, 19, 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] [2020-10-09 14:49:27,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 mathsat -unsat_core_generation=3 [2020-10-09 14:49:27,176 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 14:49:27,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 14:49:27,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1339585401, now seen corresponding path program 9 times [2020-10-09 14:49:27,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 14:49:27,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271332417] [2020-10-09 14:49:27,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 29 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with mathsat -unsat_core_generation=3 [2020-10-09 14:49:27,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-10-09 14:49:27,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:49:27,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 47 conjunts are in the unsatisfiable core [2020-10-09 14:49:27,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:49:28,067 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 14:49:28,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 14:49:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 0 proven. 1883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:49:28,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:49:28,875 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 14:49:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 0 proven. 1883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 14:49:29,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271332417] [2020-10-09 14:49:29,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1699063165] [2020-10-09 14:49:29,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 30 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 14:49:29,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-10-09 14:49:29,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 14:49:29,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 42 conjunts are in the unsatisfiable core [2020-10-09 14:49:29,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 14:49:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1870 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-09 14:49:31,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 14:49:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1883 backedges. 1870 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-09 14:49:33,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2020-10-09 14:49:33,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43, 43] imperfect sequences [46, 46] total 91 [2020-10-09 14:49:33,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28154590] [2020-10-09 14:49:33,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-09 14:49:33,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 14:49:33,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-09 14:49:33,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1026, Invalid=7164, Unknown=0, NotChecked=0, Total=8190 [2020-10-09 14:49:34,649 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 55 [2020-10-09 14:49:34,650 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 235 transitions, 2121 flow. Second operand 43 states. [2020-10-09 14:49:34,650 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 14:49:34,650 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 55 [2020-10-09 14:49:34,650 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 14:50:18,434 INFO L129 PetriNetUnfolder]: 17544/65233 cut-off events. [2020-10-09 14:50:18,435 INFO L130 PetriNetUnfolder]: For 11980930/11984359 co-relation queries the response was YES. [2020-10-09 14:50:20,640 INFO L80 FinitePrefix]: Finished finitePrefix Result has 483531 conditions, 65233 events. 17544/65233 cut-off events. For 11980930/11984359 co-relation queries the response was YES. Maximal size of possible extension queue 1038. Compared 844926 event pairs, 1920 based on Foata normal form. 2540/63200 useless extension candidates. Maximal degree in co-relation 483360. Up to 10861 conditions per place. [2020-10-09 14:50:20,705 INFO L132 encePairwiseOnDemand]: 49/55 looper letters, 0 selfloop transitions, 0 changer transitions 325/325 dead transitions. [2020-10-09 14:50:20,705 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 325 transitions, 2213 flow [2020-10-09 14:50:20,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-09 14:50:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-09 14:50:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 2939 transitions. [2020-10-09 14:50:20,709 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8481962481962482 [2020-10-09 14:50:20,709 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 2939 transitions. [2020-10-09 14:50:20,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 2939 transitions. [2020-10-09 14:50:20,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 14:50:20,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 2939 transitions. [2020-10-09 14:50:20,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 64 states. [2020-10-09 14:50:20,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 64 states. [2020-10-09 14:50:20,716 INFO L81 ComplementDD]: Finished complementDD. Result 64 states. [2020-10-09 14:50:20,716 INFO L185 Difference]: Start difference. First operand has 535 places, 235 transitions, 2121 flow. Second operand 63 states and 2939 transitions. [2020-10-09 14:50:20,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 325 transitions, 2213 flow [2020-10-09 14:50:49,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 325 transitions, 1703 flow, removed 99 selfloop flow, removed 131 redundant places. [2020-10-09 14:50:49,435 INFO L241 Difference]: Finished difference. Result has 386 places, 0 transitions, 0 flow [2020-10-09 14:50:49,435 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=55, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=0, PETRI_PLACES=386, PETRI_TRANSITIONS=0} [2020-10-09 14:50:49,435 INFO L341 CegarLoopForPetriNet]: 55 programPoint places, 331 predicate places. [2020-10-09 14:50:49,435 INFO L481 AbstractCegarLoop]: Abstraction has has 386 places, 0 transitions, 0 flow [2020-10-09 14:50:49,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-09 14:50:49,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 cvc4 --incremental --print-success --lang smt --rewrite-divk,29 mathsat -unsat_core_generation=3 [2020-10-09 14:50:49,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 02:50:49 BasicIcfg [2020-10-09 14:50:49,843 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 14:50:49,844 INFO L168 Benchmark]: Toolchain (without parser) took 167698.25 ms. Allocated memory was 250.1 MB in the beginning and 6.1 GB in the end (delta: 5.8 GB). Free memory was 204.8 MB in the beginning and 2.7 GB in the end (delta: -2.5 GB). Peak memory consumption was 4.8 GB. Max. memory is 14.2 GB. [2020-10-09 14:50:49,845 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 250.1 MB. Free memory is still 226.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 14:50:49,846 INFO L168 Benchmark]: CACSL2BoogieTranslator took 668.88 ms. Allocated memory was 250.1 MB in the beginning and 308.3 MB in the end (delta: 58.2 MB). Free memory was 204.8 MB in the beginning and 261.7 MB in the end (delta: -56.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. [2020-10-09 14:50:49,846 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.91 ms. Allocated memory is still 308.3 MB. Free memory was 261.7 MB in the beginning and 259.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 14:50:49,847 INFO L168 Benchmark]: Boogie Preprocessor took 31.13 ms. Allocated memory is still 308.3 MB. Free memory was 259.1 MB in the beginning and 256.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 14:50:49,848 INFO L168 Benchmark]: RCFGBuilder took 358.39 ms. Allocated memory is still 308.3 MB. Free memory was 256.6 MB in the beginning and 237.3 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-09 14:50:49,848 INFO L168 Benchmark]: TraceAbstraction took 166572.04 ms. Allocated memory was 308.3 MB in the beginning and 6.1 GB in the end (delta: 5.8 GB). Free memory was 237.3 MB in the beginning and 2.7 GB in the end (delta: -2.5 GB). Peak memory consumption was 4.7 GB. Max. memory is 14.2 GB. [2020-10-09 14:50:49,852 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 250.1 MB. Free memory is still 226.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 668.88 ms. Allocated memory was 250.1 MB in the beginning and 308.3 MB in the end (delta: 58.2 MB). Free memory was 204.8 MB in the beginning and 261.7 MB in the end (delta: -56.9 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 62.91 ms. Allocated memory is still 308.3 MB. Free memory was 261.7 MB in the beginning and 259.1 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 31.13 ms. Allocated memory is still 308.3 MB. Free memory was 259.1 MB in the beginning and 256.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 358.39 ms. Allocated memory is still 308.3 MB. Free memory was 256.6 MB in the beginning and 237.3 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 166572.04 ms. Allocated memory was 308.3 MB in the beginning and 6.1 GB in the end (delta: 5.8 GB). Free memory was 237.3 MB in the beginning and 2.7 GB in the end (delta: -2.5 GB). Peak memory consumption was 4.7 GB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 166.4s, OverallIterations: 12, TraceHistogramMax: 21, AutomataDifference: 141.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 1221 SDslu, 774 SDs, 0 SdLazy, 3836 SolverSat, 1870 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6395 GetRequests, 5222 SyntacticMatches, 231 SemanticMatches, 942 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36128 ImplicationChecksByTransitivity, 32.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11107occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 15.5s InterpolantComputationTime, 2947 NumberOfCodeBlocks, 2947 NumberOfCodeBlocksAsserted, 163 NumberOfCheckSat, 5836 ConstructedInterpolants, 0 QuantifiedInterpolants, 2784174 SizeOfPredicates, 556 NumberOfNonLiveVariables, 5696 ConjunctsInSsa, 641 ConjunctsInUnsatCore, 58 InterpolantComputations, 8 PerfectInterpolantSequences, 7532/26988 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...