/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 03:24:01,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 03:24:01,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 03:24:01,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 03:24:01,111 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 03:24:01,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 03:24:01,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 03:24:01,126 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 03:24:01,129 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 03:24:01,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 03:24:01,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 03:24:01,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 03:24:01,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 03:24:01,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 03:24:01,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 03:24:01,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 03:24:01,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 03:24:01,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 03:24:01,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 03:24:01,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 03:24:01,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 03:24:01,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 03:24:01,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 03:24:01,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 03:24:01,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 03:24:01,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 03:24:01,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 03:24:01,178 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 03:24:01,179 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 03:24:01,180 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 03:24:01,180 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 03:24:01,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 03:24:01,183 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 03:24:01,184 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 03:24:01,185 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 03:24:01,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 03:24:01,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 03:24:01,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 03:24:01,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 03:24:01,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 03:24:01,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 03:24:01,190 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf [2020-10-16 03:24:01,231 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 03:24:01,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 03:24:01,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 03:24:01,233 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 03:24:01,233 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 03:24:01,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 03:24:01,234 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 03:24:01,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 03:24:01,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 03:24:01,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 03:24:01,236 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 03:24:01,236 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 03:24:01,236 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 03:24:01,236 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 03:24:01,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 03:24:01,237 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 03:24:01,237 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 03:24:01,237 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 03:24:01,237 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 03:24:01,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 03:24:01,238 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 03:24:01,238 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 03:24:01,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 03:24:01,238 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 03:24:01,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 03:24:01,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 03:24:01,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 03:24:01,239 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 03:24:01,239 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 03:24:01,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 03:24:01,520 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 03:24:01,523 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 03:24:01,525 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 03:24:01,525 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 03:24:01,526 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2020-10-16 03:24:01,602 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9462bb38d/c924754be9cb464a87fb89b2ae519b8b/FLAG68dadc897 [2020-10-16 03:24:02,151 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 03:24:02,152 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2020-10-16 03:24:02,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9462bb38d/c924754be9cb464a87fb89b2ae519b8b/FLAG68dadc897 [2020-10-16 03:24:02,440 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9462bb38d/c924754be9cb464a87fb89b2ae519b8b [2020-10-16 03:24:02,448 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 03:24:02,451 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 03:24:02,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 03:24:02,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 03:24:02,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 03:24:02,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:24:02" (1/1) ... [2020-10-16 03:24:02,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b98c98a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:02, skipping insertion in model container [2020-10-16 03:24:02,460 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:24:02" (1/1) ... [2020-10-16 03:24:02,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 03:24:02,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 03:24:03,120 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 03:24:03,137 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 03:24:03,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 03:24:03,288 INFO L208 MainTranslator]: Completed translation [2020-10-16 03:24:03,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:03 WrapperNode [2020-10-16 03:24:03,288 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 03:24:03,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 03:24:03,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 03:24:03,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 03:24:03,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:03" (1/1) ... [2020-10-16 03:24:03,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:03" (1/1) ... [2020-10-16 03:24:03,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 03:24:03,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 03:24:03,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 03:24:03,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 03:24:03,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:03" (1/1) ... [2020-10-16 03:24:03,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:03" (1/1) ... [2020-10-16 03:24:03,350 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:03" (1/1) ... [2020-10-16 03:24:03,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:03" (1/1) ... [2020-10-16 03:24:03,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:03" (1/1) ... [2020-10-16 03:24:03,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:03" (1/1) ... [2020-10-16 03:24:03,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:03" (1/1) ... [2020-10-16 03:24:03,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 03:24:03,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 03:24:03,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 03:24:03,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 03:24:03,369 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 03:24:03,451 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 03:24:03,451 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 03:24:03,451 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 03:24:03,451 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 03:24:03,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 03:24:03,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 03:24:03,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 03:24:03,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 03:24:03,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 03:24:03,454 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 03:24:03,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 03:24:03,457 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 03:24:03,743 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 03:24:03,743 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 03:24:03,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:24:03 BoogieIcfgContainer [2020-10-16 03:24:03,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 03:24:03,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 03:24:03,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 03:24:03,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 03:24:03,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:24:02" (1/3) ... [2020-10-16 03:24:03,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7703beb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:24:03, skipping insertion in model container [2020-10-16 03:24:03,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:24:03" (2/3) ... [2020-10-16 03:24:03,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7703beb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:24:03, skipping insertion in model container [2020-10-16 03:24:03,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:24:03" (3/3) ... [2020-10-16 03:24:03,760 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2020-10-16 03:24:03,776 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 03:24:03,786 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 03:24:03,788 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 03:24:03,824 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,825 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,825 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,825 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,826 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,826 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,827 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,827 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,828 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,828 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,828 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,829 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,829 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,830 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,830 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,830 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,831 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,831 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,831 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,832 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,832 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,832 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,833 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,833 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,833 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,834 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,834 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,834 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,838 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,839 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,839 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,839 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,839 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,839 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,844 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,845 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,845 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,845 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,845 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,845 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 03:24:03,866 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 03:24:03,890 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 03:24:03,891 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 03:24:03,891 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 03:24:03,891 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 03:24:03,891 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 03:24:03,891 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 03:24:03,891 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 03:24:03,892 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 03:24:03,906 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 03:24:03,955 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 03:24:03,955 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:24:03,967 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. [2020-10-16 03:24:03,969 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 03:24:03,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 53 transitions, 112 flow [2020-10-16 03:24:03,985 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 03:24:03,993 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions, 112 flow [2020-10-16 03:24:03,996 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 53 transitions, 112 flow [2020-10-16 03:24:03,996 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions, 112 flow [2020-10-16 03:24:04,021 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 03:24:04,022 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:24:04,023 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 81 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. [2020-10-16 03:24:04,025 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 03:24:05,074 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-16 03:24:05,288 INFO L132 LiptonReduction]: Checked pairs total: 881 [2020-10-16 03:24:05,288 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 03:24:05,291 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1308 [2020-10-16 03:24:05,299 INFO L129 PetriNetUnfolder]: 2/12 cut-off events. [2020-10-16 03:24:05,299 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:24:05,299 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:05,300 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 03:24:05,301 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:05,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:05,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 03:24:05,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:05,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149174497] [2020-10-16 03:24:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:05,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149174497] [2020-10-16 03:24:05,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:24:05,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 03:24:05,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784673570] [2020-10-16 03:24:05,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 03:24:05,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:05,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 03:24:05,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 03:24:05,603 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:05,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 32 flow. Second operand 4 states. [2020-10-16 03:24:05,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:05,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:05,607 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:05,683 INFO L129 PetriNetUnfolder]: 29/61 cut-off events. [2020-10-16 03:24:05,683 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 03:24:05,684 INFO L80 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 61 events. 29/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 148 event pairs, 4 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 106. Up to 28 conditions per place. [2020-10-16 03:24:05,686 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 7 selfloop transitions, 5 changer transitions 3/22 dead transitions. [2020-10-16 03:24:05,686 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 80 flow [2020-10-16 03:24:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 03:24:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 03:24:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2020-10-16 03:24:05,705 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.684 [2020-10-16 03:24:05,707 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 342 transitions. [2020-10-16 03:24:05,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 342 transitions. [2020-10-16 03:24:05,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:05,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 342 transitions. [2020-10-16 03:24:05,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 03:24:05,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 03:24:05,726 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 03:24:05,728 INFO L185 Difference]: Start difference. First operand has 18 places, 13 transitions, 32 flow. Second operand 5 states and 342 transitions. [2020-10-16 03:24:05,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 80 flow [2020-10-16 03:24:05,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 22 transitions, 78 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 03:24:05,735 INFO L241 Difference]: Finished difference. Result has 23 places, 16 transitions, 65 flow [2020-10-16 03:24:05,738 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=65, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2020-10-16 03:24:05,739 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 5 predicate places. [2020-10-16 03:24:05,740 INFO L481 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 65 flow [2020-10-16 03:24:05,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 03:24:05,740 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:05,740 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:05,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 03:24:05,741 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:05,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:05,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2130400634, now seen corresponding path program 1 times [2020-10-16 03:24:05,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:05,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425512964] [2020-10-16 03:24:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:05,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425512964] [2020-10-16 03:24:05,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:24:05,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 03:24:05,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579476479] [2020-10-16 03:24:05,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 03:24:05,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:05,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 03:24:05,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 03:24:05,837 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:05,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 65 flow. Second operand 5 states. [2020-10-16 03:24:05,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:05,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:05,838 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:05,879 INFO L129 PetriNetUnfolder]: 17/42 cut-off events. [2020-10-16 03:24:05,879 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2020-10-16 03:24:05,880 INFO L80 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 42 events. 17/42 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 82 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 112. Up to 21 conditions per place. [2020-10-16 03:24:05,881 INFO L132 encePairwiseOnDemand]: 96/100 looper letters, 12 selfloop transitions, 6 changer transitions 0/25 dead transitions. [2020-10-16 03:24:05,881 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 25 transitions, 147 flow [2020-10-16 03:24:05,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 03:24:05,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 03:24:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 271 transitions. [2020-10-16 03:24:05,884 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6775 [2020-10-16 03:24:05,884 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 271 transitions. [2020-10-16 03:24:05,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 271 transitions. [2020-10-16 03:24:05,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:05,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 271 transitions. [2020-10-16 03:24:05,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 03:24:05,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 03:24:05,888 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 03:24:05,888 INFO L185 Difference]: Start difference. First operand has 23 places, 16 transitions, 65 flow. Second operand 4 states and 271 transitions. [2020-10-16 03:24:05,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 25 transitions, 147 flow [2020-10-16 03:24:05,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 25 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 03:24:05,891 INFO L241 Difference]: Finished difference. Result has 26 places, 21 transitions, 114 flow [2020-10-16 03:24:05,891 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2020-10-16 03:24:05,892 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 8 predicate places. [2020-10-16 03:24:05,892 INFO L481 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 114 flow [2020-10-16 03:24:05,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 03:24:05,892 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:05,893 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:05,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 03:24:05,893 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:05,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:05,893 INFO L82 PathProgramCache]: Analyzing trace with hash 993324059, now seen corresponding path program 1 times [2020-10-16 03:24:05,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:05,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938674374] [2020-10-16 03:24:05,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:05,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:05,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938674374] [2020-10-16 03:24:05,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:24:05,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 03:24:05,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452491488] [2020-10-16 03:24:05,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 03:24:05,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:05,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 03:24:05,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 03:24:05,974 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:05,974 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 114 flow. Second operand 6 states. [2020-10-16 03:24:05,974 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:05,975 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:05,975 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:06,070 INFO L129 PetriNetUnfolder]: 28/67 cut-off events. [2020-10-16 03:24:06,070 INFO L130 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2020-10-16 03:24:06,071 INFO L80 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 67 events. 28/67 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 157 event pairs, 0 based on Foata normal form. 2/68 useless extension candidates. Maximal degree in co-relation 217. Up to 23 conditions per place. [2020-10-16 03:24:06,072 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 13 selfloop transitions, 17 changer transitions 0/37 dead transitions. [2020-10-16 03:24:06,072 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 270 flow [2020-10-16 03:24:06,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 03:24:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 03:24:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 542 transitions. [2020-10-16 03:24:06,076 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6775 [2020-10-16 03:24:06,076 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 542 transitions. [2020-10-16 03:24:06,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 542 transitions. [2020-10-16 03:24:06,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:06,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 542 transitions. [2020-10-16 03:24:06,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 03:24:06,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 03:24:06,081 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 03:24:06,081 INFO L185 Difference]: Start difference. First operand has 26 places, 21 transitions, 114 flow. Second operand 8 states and 542 transitions. [2020-10-16 03:24:06,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 270 flow [2020-10-16 03:24:06,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 268 flow, removed 1 selfloop flow, removed 0 redundant places. [2020-10-16 03:24:06,085 INFO L241 Difference]: Finished difference. Result has 37 places, 31 transitions, 245 flow [2020-10-16 03:24:06,086 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2020-10-16 03:24:06,086 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 19 predicate places. [2020-10-16 03:24:06,086 INFO L481 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 245 flow [2020-10-16 03:24:06,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 03:24:06,087 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:06,087 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:06,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 03:24:06,087 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:06,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:06,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1383900809, now seen corresponding path program 2 times [2020-10-16 03:24:06,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:06,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330853093] [2020-10-16 03:24:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:06,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330853093] [2020-10-16 03:24:06,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:24:06,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 03:24:06,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382072275] [2020-10-16 03:24:06,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 03:24:06,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:06,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 03:24:06,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 03:24:06,208 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:06,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 245 flow. Second operand 6 states. [2020-10-16 03:24:06,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:06,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:06,210 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:06,297 INFO L129 PetriNetUnfolder]: 25/61 cut-off events. [2020-10-16 03:24:06,297 INFO L130 PetriNetUnfolder]: For 207/213 co-relation queries the response was YES. [2020-10-16 03:24:06,298 INFO L80 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 61 events. 25/61 cut-off events. For 207/213 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 149 event pairs, 0 based on Foata normal form. 4/64 useless extension candidates. Maximal degree in co-relation 276. Up to 23 conditions per place. [2020-10-16 03:24:06,299 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 12 selfloop transitions, 18 changer transitions 0/37 dead transitions. [2020-10-16 03:24:06,299 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 371 flow [2020-10-16 03:24:06,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 03:24:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 03:24:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 474 transitions. [2020-10-16 03:24:06,302 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6771428571428572 [2020-10-16 03:24:06,302 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 474 transitions. [2020-10-16 03:24:06,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 474 transitions. [2020-10-16 03:24:06,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:06,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 474 transitions. [2020-10-16 03:24:06,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 03:24:06,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 03:24:06,305 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 03:24:06,306 INFO L185 Difference]: Start difference. First operand has 37 places, 31 transitions, 245 flow. Second operand 7 states and 474 transitions. [2020-10-16 03:24:06,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 371 flow [2020-10-16 03:24:06,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 338 flow, removed 9 selfloop flow, removed 3 redundant places. [2020-10-16 03:24:06,312 INFO L241 Difference]: Finished difference. Result has 42 places, 32 transitions, 280 flow [2020-10-16 03:24:06,313 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=280, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2020-10-16 03:24:06,313 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 24 predicate places. [2020-10-16 03:24:06,313 INFO L481 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 280 flow [2020-10-16 03:24:06,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 03:24:06,313 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:06,314 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:06,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 03:24:06,314 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:06,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:06,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1013031689, now seen corresponding path program 3 times [2020-10-16 03:24:06,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:06,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621555154] [2020-10-16 03:24:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:06,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621555154] [2020-10-16 03:24:06,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 03:24:06,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 03:24:06,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782780174] [2020-10-16 03:24:06,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 03:24:06,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:06,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 03:24:06,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 03:24:06,379 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:06,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 280 flow. Second operand 6 states. [2020-10-16 03:24:06,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:06,380 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:06,380 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:06,465 INFO L129 PetriNetUnfolder]: 30/73 cut-off events. [2020-10-16 03:24:06,466 INFO L130 PetriNetUnfolder]: For 319/325 co-relation queries the response was YES. [2020-10-16 03:24:06,467 INFO L80 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 73 events. 30/73 cut-off events. For 319/325 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 207 event pairs, 0 based on Foata normal form. 2/75 useless extension candidates. Maximal degree in co-relation 357. Up to 34 conditions per place. [2020-10-16 03:24:06,468 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 21 selfloop transitions, 16 changer transitions 0/44 dead transitions. [2020-10-16 03:24:06,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 484 flow [2020-10-16 03:24:06,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 03:24:06,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 03:24:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 474 transitions. [2020-10-16 03:24:06,471 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6771428571428572 [2020-10-16 03:24:06,471 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 474 transitions. [2020-10-16 03:24:06,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 474 transitions. [2020-10-16 03:24:06,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:06,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 474 transitions. [2020-10-16 03:24:06,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 03:24:06,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 03:24:06,474 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 03:24:06,474 INFO L185 Difference]: Start difference. First operand has 42 places, 32 transitions, 280 flow. Second operand 7 states and 474 transitions. [2020-10-16 03:24:06,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 484 flow [2020-10-16 03:24:06,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 434 flow, removed 8 selfloop flow, removed 5 redundant places. [2020-10-16 03:24:06,481 INFO L241 Difference]: Finished difference. Result has 46 places, 39 transitions, 370 flow [2020-10-16 03:24:06,481 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=370, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2020-10-16 03:24:06,481 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 28 predicate places. [2020-10-16 03:24:06,482 INFO L481 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 370 flow [2020-10-16 03:24:06,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 03:24:06,482 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:06,482 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:06,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 03:24:06,482 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:06,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:06,483 INFO L82 PathProgramCache]: Analyzing trace with hash 728810004, now seen corresponding path program 4 times [2020-10-16 03:24:06,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:06,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875394154] [2020-10-16 03:24:06,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:06,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875394154] [2020-10-16 03:24:06,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301437085] [2020-10-16 03:24:06,551 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:06,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:24:06,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 03:24:06,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:06,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:24:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:06,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:06,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 03:24:06,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828324109] [2020-10-16 03:24:06,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 03:24:06,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:06,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 03:24:06,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-16 03:24:06,672 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:06,673 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 370 flow. Second operand 8 states. [2020-10-16 03:24:06,673 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:06,673 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:06,673 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:06,792 INFO L129 PetriNetUnfolder]: 33/80 cut-off events. [2020-10-16 03:24:06,792 INFO L130 PetriNetUnfolder]: For 371/376 co-relation queries the response was YES. [2020-10-16 03:24:06,793 INFO L80 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 80 events. 33/80 cut-off events. For 371/376 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 232 event pairs, 0 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 411. Up to 33 conditions per place. [2020-10-16 03:24:06,795 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 13 selfloop transitions, 28 changer transitions 0/48 dead transitions. [2020-10-16 03:24:06,795 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 566 flow [2020-10-16 03:24:06,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 03:24:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 03:24:06,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 541 transitions. [2020-10-16 03:24:06,798 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67625 [2020-10-16 03:24:06,798 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 541 transitions. [2020-10-16 03:24:06,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 541 transitions. [2020-10-16 03:24:06,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:06,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 541 transitions. [2020-10-16 03:24:06,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 03:24:06,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 03:24:06,801 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 03:24:06,802 INFO L185 Difference]: Start difference. First operand has 46 places, 39 transitions, 370 flow. Second operand 8 states and 541 transitions. [2020-10-16 03:24:06,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 566 flow [2020-10-16 03:24:06,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 548 flow, removed 5 selfloop flow, removed 1 redundant places. [2020-10-16 03:24:06,808 INFO L241 Difference]: Finished difference. Result has 54 places, 42 transitions, 474 flow [2020-10-16 03:24:06,808 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=474, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2020-10-16 03:24:06,808 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 36 predicate places. [2020-10-16 03:24:06,808 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 474 flow [2020-10-16 03:24:06,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 03:24:06,809 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:06,809 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:07,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 03:24:07,025 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:07,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:07,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1735406889, now seen corresponding path program 5 times [2020-10-16 03:24:07,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:07,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687255513] [2020-10-16 03:24:07,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:07,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:07,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687255513] [2020-10-16 03:24:07,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917125369] [2020-10-16 03:24:07,130 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:07,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:07,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:07,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 03:24:07,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:07,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:07,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 03:24:07,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928958450] [2020-10-16 03:24:07,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 03:24:07,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:07,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 03:24:07,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-16 03:24:07,218 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:07,219 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 474 flow. Second operand 7 states. [2020-10-16 03:24:07,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:07,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:07,219 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:07,305 INFO L129 PetriNetUnfolder]: 35/85 cut-off events. [2020-10-16 03:24:07,305 INFO L130 PetriNetUnfolder]: For 593/602 co-relation queries the response was YES. [2020-10-16 03:24:07,306 INFO L80 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 85 events. 35/85 cut-off events. For 593/602 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 245 event pairs, 0 based on Foata normal form. 11/96 useless extension candidates. Maximal degree in co-relation 490. Up to 44 conditions per place. [2020-10-16 03:24:07,307 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 28 selfloop transitions, 15 changer transitions 0/50 dead transitions. [2020-10-16 03:24:07,308 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 674 flow [2020-10-16 03:24:07,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 03:24:07,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 03:24:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 540 transitions. [2020-10-16 03:24:07,310 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:24:07,310 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 540 transitions. [2020-10-16 03:24:07,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 540 transitions. [2020-10-16 03:24:07,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:07,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 540 transitions. [2020-10-16 03:24:07,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 03:24:07,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 03:24:07,314 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 03:24:07,314 INFO L185 Difference]: Start difference. First operand has 54 places, 42 transitions, 474 flow. Second operand 8 states and 540 transitions. [2020-10-16 03:24:07,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 674 flow [2020-10-16 03:24:07,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 50 transitions, 622 flow, removed 8 selfloop flow, removed 5 redundant places. [2020-10-16 03:24:07,321 INFO L241 Difference]: Finished difference. Result has 59 places, 45 transitions, 509 flow [2020-10-16 03:24:07,321 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=509, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2020-10-16 03:24:07,322 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 41 predicate places. [2020-10-16 03:24:07,322 INFO L481 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 509 flow [2020-10-16 03:24:07,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 03:24:07,322 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:07,322 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:07,537 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:07,538 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:07,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:07,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1339228555, now seen corresponding path program 6 times [2020-10-16 03:24:07,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:07,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274579008] [2020-10-16 03:24:07,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:07,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274579008] [2020-10-16 03:24:07,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267783247] [2020-10-16 03:24:07,590 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:07,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 03:24:07,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:07,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:24:07,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:07,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:07,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 03:24:07,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696564453] [2020-10-16 03:24:07,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 03:24:07,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:07,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 03:24:07,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 03:24:07,669 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:07,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 509 flow. Second operand 8 states. [2020-10-16 03:24:07,670 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:07,670 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:07,670 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:07,926 INFO L129 PetriNetUnfolder]: 39/95 cut-off events. [2020-10-16 03:24:07,926 INFO L130 PetriNetUnfolder]: For 807/809 co-relation queries the response was YES. [2020-10-16 03:24:07,927 INFO L80 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 95 events. 39/95 cut-off events. For 807/809 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 296 event pairs, 0 based on Foata normal form. 4/99 useless extension candidates. Maximal degree in co-relation 579. Up to 43 conditions per place. [2020-10-16 03:24:07,932 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 25 selfloop transitions, 24 changer transitions 0/56 dead transitions. [2020-10-16 03:24:07,932 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 789 flow [2020-10-16 03:24:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 03:24:07,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-16 03:24:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 744 transitions. [2020-10-16 03:24:07,936 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6763636363636364 [2020-10-16 03:24:07,936 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 744 transitions. [2020-10-16 03:24:07,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 744 transitions. [2020-10-16 03:24:07,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:07,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 744 transitions. [2020-10-16 03:24:07,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-16 03:24:07,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-16 03:24:07,943 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-16 03:24:07,943 INFO L185 Difference]: Start difference. First operand has 59 places, 45 transitions, 509 flow. Second operand 11 states and 744 transitions. [2020-10-16 03:24:07,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 789 flow [2020-10-16 03:24:07,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 56 transitions, 722 flow, removed 25 selfloop flow, removed 3 redundant places. [2020-10-16 03:24:07,953 INFO L241 Difference]: Finished difference. Result has 69 places, 49 transitions, 594 flow [2020-10-16 03:24:07,953 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=594, PETRI_PLACES=69, PETRI_TRANSITIONS=49} [2020-10-16 03:24:07,953 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 51 predicate places. [2020-10-16 03:24:07,954 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 49 transitions, 594 flow [2020-10-16 03:24:07,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 03:24:07,954 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:07,954 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:08,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:08,170 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:08,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1051578980, now seen corresponding path program 7 times [2020-10-16 03:24:08,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:08,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4134246] [2020-10-16 03:24:08,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:08,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4134246] [2020-10-16 03:24:08,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816215275] [2020-10-16 03:24:08,275 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:08,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:24:08,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:08,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:08,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 03:24:08,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693767619] [2020-10-16 03:24:08,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 03:24:08,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:08,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 03:24:08,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 03:24:08,353 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:08,353 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 49 transitions, 594 flow. Second operand 8 states. [2020-10-16 03:24:08,353 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:08,353 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:08,354 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:08,477 INFO L129 PetriNetUnfolder]: 41/102 cut-off events. [2020-10-16 03:24:08,477 INFO L130 PetriNetUnfolder]: For 952/961 co-relation queries the response was YES. [2020-10-16 03:24:08,478 INFO L80 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 102 events. 41/102 cut-off events. For 952/961 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 329 event pairs, 0 based on Foata normal form. 7/109 useless extension candidates. Maximal degree in co-relation 656. Up to 47 conditions per place. [2020-10-16 03:24:08,480 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 25 selfloop transitions, 26 changer transitions 0/58 dead transitions. [2020-10-16 03:24:08,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 58 transitions, 858 flow [2020-10-16 03:24:08,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 03:24:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-16 03:24:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 675 transitions. [2020-10-16 03:24:08,483 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 03:24:08,483 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 675 transitions. [2020-10-16 03:24:08,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 675 transitions. [2020-10-16 03:24:08,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:08,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 675 transitions. [2020-10-16 03:24:08,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-16 03:24:08,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-16 03:24:08,488 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-16 03:24:08,488 INFO L185 Difference]: Start difference. First operand has 69 places, 49 transitions, 594 flow. Second operand 10 states and 675 transitions. [2020-10-16 03:24:08,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 58 transitions, 858 flow [2020-10-16 03:24:08,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 58 transitions, 785 flow, removed 22 selfloop flow, removed 5 redundant places. [2020-10-16 03:24:08,497 INFO L241 Difference]: Finished difference. Result has 75 places, 51 transitions, 632 flow [2020-10-16 03:24:08,497 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=632, PETRI_PLACES=75, PETRI_TRANSITIONS=51} [2020-10-16 03:24:08,498 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 57 predicate places. [2020-10-16 03:24:08,498 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 51 transitions, 632 flow [2020-10-16 03:24:08,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 03:24:08,498 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:08,498 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:08,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:08,702 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:08,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:08,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1117784062, now seen corresponding path program 8 times [2020-10-16 03:24:08,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:08,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856854418] [2020-10-16 03:24:08,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:08,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856854418] [2020-10-16 03:24:08,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422062844] [2020-10-16 03:24:08,764 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:08,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:08,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:08,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:24:08,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:08,850 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:08,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:08,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 03:24:08,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721748846] [2020-10-16 03:24:08,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 03:24:08,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:08,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 03:24:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 03:24:08,875 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:08,876 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 51 transitions, 632 flow. Second operand 9 states. [2020-10-16 03:24:08,876 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:08,876 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:08,876 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:09,077 INFO L129 PetriNetUnfolder]: 45/114 cut-off events. [2020-10-16 03:24:09,077 INFO L130 PetriNetUnfolder]: For 1113/1115 co-relation queries the response was YES. [2020-10-16 03:24:09,078 INFO L80 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 114 events. 45/114 cut-off events. For 1113/1115 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 396 event pairs, 0 based on Foata normal form. 4/118 useless extension candidates. Maximal degree in co-relation 756. Up to 55 conditions per place. [2020-10-16 03:24:09,081 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 23 selfloop transitions, 32 changer transitions 0/62 dead transitions. [2020-10-16 03:24:09,081 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 62 transitions, 936 flow [2020-10-16 03:24:09,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 03:24:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-16 03:24:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 743 transitions. [2020-10-16 03:24:09,086 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754545454545454 [2020-10-16 03:24:09,086 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 743 transitions. [2020-10-16 03:24:09,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 743 transitions. [2020-10-16 03:24:09,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:09,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 743 transitions. [2020-10-16 03:24:09,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-16 03:24:09,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-16 03:24:09,093 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-16 03:24:09,093 INFO L185 Difference]: Start difference. First operand has 75 places, 51 transitions, 632 flow. Second operand 11 states and 743 transitions. [2020-10-16 03:24:09,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 62 transitions, 936 flow [2020-10-16 03:24:09,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 62 transitions, 857 flow, removed 18 selfloop flow, removed 7 redundant places. [2020-10-16 03:24:09,104 INFO L241 Difference]: Finished difference. Result has 80 places, 55 transitions, 714 flow [2020-10-16 03:24:09,105 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=714, PETRI_PLACES=80, PETRI_TRANSITIONS=55} [2020-10-16 03:24:09,105 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 62 predicate places. [2020-10-16 03:24:09,105 INFO L481 AbstractCegarLoop]: Abstraction has has 80 places, 55 transitions, 714 flow [2020-10-16 03:24:09,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 03:24:09,105 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:09,106 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:09,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 03:24:09,321 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:09,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:09,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1510678266, now seen corresponding path program 9 times [2020-10-16 03:24:09,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:09,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126647213] [2020-10-16 03:24:09,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:09,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126647213] [2020-10-16 03:24:09,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751897482] [2020-10-16 03:24:09,375 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:09,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 03:24:09,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:09,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 03:24:09,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:09,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:09,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 03:24:09,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171885780] [2020-10-16 03:24:09,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 03:24:09,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:09,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 03:24:09,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 03:24:09,447 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:09,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 55 transitions, 714 flow. Second operand 8 states. [2020-10-16 03:24:09,448 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:09,448 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:09,448 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:09,618 INFO L129 PetriNetUnfolder]: 56/139 cut-off events. [2020-10-16 03:24:09,618 INFO L130 PetriNetUnfolder]: For 1641/1643 co-relation queries the response was YES. [2020-10-16 03:24:09,620 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 139 events. 56/139 cut-off events. For 1641/1643 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 496 event pairs, 0 based on Foata normal form. 2/141 useless extension candidates. Maximal degree in co-relation 998. Up to 73 conditions per place. [2020-10-16 03:24:09,622 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 19 selfloop transitions, 47 changer transitions 0/73 dead transitions. [2020-10-16 03:24:09,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 73 transitions, 1192 flow [2020-10-16 03:24:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:24:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:24:09,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 812 transitions. [2020-10-16 03:24:09,627 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6766666666666666 [2020-10-16 03:24:09,627 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 812 transitions. [2020-10-16 03:24:09,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 812 transitions. [2020-10-16 03:24:09,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:09,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 812 transitions. [2020-10-16 03:24:09,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:24:09,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:24:09,633 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:24:09,633 INFO L185 Difference]: Start difference. First operand has 80 places, 55 transitions, 714 flow. Second operand 12 states and 812 transitions. [2020-10-16 03:24:09,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 73 transitions, 1192 flow [2020-10-16 03:24:09,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 73 transitions, 1061 flow, removed 38 selfloop flow, removed 9 redundant places. [2020-10-16 03:24:09,646 INFO L241 Difference]: Finished difference. Result has 86 places, 63 transitions, 894 flow [2020-10-16 03:24:09,646 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=894, PETRI_PLACES=86, PETRI_TRANSITIONS=63} [2020-10-16 03:24:09,647 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 68 predicate places. [2020-10-16 03:24:09,647 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 63 transitions, 894 flow [2020-10-16 03:24:09,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 03:24:09,647 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:09,647 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:09,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:09,861 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:09,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:09,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1118290912, now seen corresponding path program 10 times [2020-10-16 03:24:09,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:09,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242793730] [2020-10-16 03:24:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:09,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242793730] [2020-10-16 03:24:09,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307101606] [2020-10-16 03:24:09,944 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:10,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:24:10,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:10,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:24:10,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:10,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:10,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:10,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 03:24:10,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047897407] [2020-10-16 03:24:10,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 03:24:10,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:10,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 03:24:10,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 03:24:10,073 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:10,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 63 transitions, 894 flow. Second operand 9 states. [2020-10-16 03:24:10,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:10,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:10,075 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:10,310 INFO L129 PetriNetUnfolder]: 53/133 cut-off events. [2020-10-16 03:24:10,310 INFO L130 PetriNetUnfolder]: For 1900/1906 co-relation queries the response was YES. [2020-10-16 03:24:10,311 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 133 events. 53/133 cut-off events. For 1900/1906 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 490 event pairs, 0 based on Foata normal form. 8/141 useless extension candidates. Maximal degree in co-relation 1022. Up to 69 conditions per place. [2020-10-16 03:24:10,314 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 16 selfloop transitions, 50 changer transitions 0/73 dead transitions. [2020-10-16 03:24:10,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 73 transitions, 1256 flow [2020-10-16 03:24:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 03:24:10,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 03:24:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 879 transitions. [2020-10-16 03:24:10,319 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6761538461538461 [2020-10-16 03:24:10,319 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 879 transitions. [2020-10-16 03:24:10,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 879 transitions. [2020-10-16 03:24:10,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:10,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 879 transitions. [2020-10-16 03:24:10,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 03:24:10,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 03:24:10,325 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 03:24:10,326 INFO L185 Difference]: Start difference. First operand has 86 places, 63 transitions, 894 flow. Second operand 13 states and 879 transitions. [2020-10-16 03:24:10,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 73 transitions, 1256 flow [2020-10-16 03:24:10,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 73 transitions, 1123 flow, removed 38 selfloop flow, removed 7 redundant places. [2020-10-16 03:24:10,343 INFO L241 Difference]: Finished difference. Result has 93 places, 64 transitions, 922 flow [2020-10-16 03:24:10,343 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=922, PETRI_PLACES=93, PETRI_TRANSITIONS=64} [2020-10-16 03:24:10,344 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 75 predicate places. [2020-10-16 03:24:10,344 INFO L481 AbstractCegarLoop]: Abstraction has has 93 places, 64 transitions, 922 flow [2020-10-16 03:24:10,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 03:24:10,344 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:10,344 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:10,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:10,558 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:10,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:10,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1433571448, now seen corresponding path program 11 times [2020-10-16 03:24:10,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:10,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523920883] [2020-10-16 03:24:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:10,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523920883] [2020-10-16 03:24:10,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204250209] [2020-10-16 03:24:10,648 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:10,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:10,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:10,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 03:24:10,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:10,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:24:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:10,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:10,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 03:24:10,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216012425] [2020-10-16 03:24:10,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 03:24:10,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:10,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 03:24:10,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-16 03:24:10,735 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:10,736 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 64 transitions, 922 flow. Second operand 9 states. [2020-10-16 03:24:10,736 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:10,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:10,736 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:10,943 INFO L129 PetriNetUnfolder]: 56/139 cut-off events. [2020-10-16 03:24:10,943 INFO L130 PetriNetUnfolder]: For 2179/2181 co-relation queries the response was YES. [2020-10-16 03:24:10,944 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 139 events. 56/139 cut-off events. For 2179/2181 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 517 event pairs, 0 based on Foata normal form. 3/142 useless extension candidates. Maximal degree in co-relation 1093. Up to 69 conditions per place. [2020-10-16 03:24:10,946 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 34 changer transitions 0/76 dead transitions. [2020-10-16 03:24:10,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 76 transitions, 1322 flow [2020-10-16 03:24:10,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:24:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:24:10,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 811 transitions. [2020-10-16 03:24:10,950 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 03:24:10,950 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 811 transitions. [2020-10-16 03:24:10,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 811 transitions. [2020-10-16 03:24:10,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:10,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 811 transitions. [2020-10-16 03:24:10,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:24:10,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:24:10,957 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:24:10,957 INFO L185 Difference]: Start difference. First operand has 93 places, 64 transitions, 922 flow. Second operand 12 states and 811 transitions. [2020-10-16 03:24:10,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 76 transitions, 1322 flow [2020-10-16 03:24:10,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 76 transitions, 1162 flow, removed 38 selfloop flow, removed 11 redundant places. [2020-10-16 03:24:10,974 INFO L241 Difference]: Finished difference. Result has 95 places, 67 transitions, 954 flow [2020-10-16 03:24:10,974 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=954, PETRI_PLACES=95, PETRI_TRANSITIONS=67} [2020-10-16 03:24:10,974 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 77 predicate places. [2020-10-16 03:24:10,975 INFO L481 AbstractCegarLoop]: Abstraction has has 95 places, 67 transitions, 954 flow [2020-10-16 03:24:10,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 03:24:10,975 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:10,975 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:11,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 03:24:11,188 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:11,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:11,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1246359991, now seen corresponding path program 12 times [2020-10-16 03:24:11,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:11,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803149171] [2020-10-16 03:24:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:11,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803149171] [2020-10-16 03:24:11,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670476937] [2020-10-16 03:24:11,249 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:11,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 03:24:11,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:11,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 03:24:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:11,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:24:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:11,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:11,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 03:24:11,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847305815] [2020-10-16 03:24:11,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 03:24:11,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:11,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 03:24:11,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-16 03:24:11,319 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:11,319 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 67 transitions, 954 flow. Second operand 10 states. [2020-10-16 03:24:11,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:11,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:11,320 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:11,543 INFO L129 PetriNetUnfolder]: 59/146 cut-off events. [2020-10-16 03:24:11,544 INFO L130 PetriNetUnfolder]: For 1848/1850 co-relation queries the response was YES. [2020-10-16 03:24:11,545 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 146 events. 59/146 cut-off events. For 1848/1850 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 543 event pairs, 0 based on Foata normal form. 1/147 useless extension candidates. Maximal degree in co-relation 1089. Up to 73 conditions per place. [2020-10-16 03:24:11,547 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 19 selfloop transitions, 54 changer transitions 0/80 dead transitions. [2020-10-16 03:24:11,547 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 80 transitions, 1380 flow [2020-10-16 03:24:11,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:24:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:24:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 811 transitions. [2020-10-16 03:24:11,550 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 03:24:11,550 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 811 transitions. [2020-10-16 03:24:11,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 811 transitions. [2020-10-16 03:24:11,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:11,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 811 transitions. [2020-10-16 03:24:11,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:24:11,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:24:11,554 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:24:11,555 INFO L185 Difference]: Start difference. First operand has 95 places, 67 transitions, 954 flow. Second operand 12 states and 811 transitions. [2020-10-16 03:24:11,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 80 transitions, 1380 flow [2020-10-16 03:24:11,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 80 transitions, 1310 flow, removed 11 selfloop flow, removed 9 redundant places. [2020-10-16 03:24:11,568 INFO L241 Difference]: Finished difference. Result has 99 places, 70 transitions, 1090 flow [2020-10-16 03:24:11,569 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1090, PETRI_PLACES=99, PETRI_TRANSITIONS=70} [2020-10-16 03:24:11,569 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 81 predicate places. [2020-10-16 03:24:11,569 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 70 transitions, 1090 flow [2020-10-16 03:24:11,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 03:24:11,569 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:11,570 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:11,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:11,785 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:11,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:11,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1053734124, now seen corresponding path program 13 times [2020-10-16 03:24:11,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:11,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41068142] [2020-10-16 03:24:11,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:11,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:11,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41068142] [2020-10-16 03:24:11,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871742414] [2020-10-16 03:24:11,874 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:11,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 03:24:11,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:11,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:11,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 03:24:11,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793514784] [2020-10-16 03:24:11,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 03:24:11,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:11,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 03:24:11,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 03:24:11,949 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:11,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 70 transitions, 1090 flow. Second operand 9 states. [2020-10-16 03:24:11,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:11,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:11,951 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:12,086 INFO L129 PetriNetUnfolder]: 61/151 cut-off events. [2020-10-16 03:24:12,087 INFO L130 PetriNetUnfolder]: For 2363/2369 co-relation queries the response was YES. [2020-10-16 03:24:12,088 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 151 events. 61/151 cut-off events. For 2363/2369 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 571 event pairs, 0 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 1208. Up to 88 conditions per place. [2020-10-16 03:24:12,091 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 55 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2020-10-16 03:24:12,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 79 transitions, 1454 flow [2020-10-16 03:24:12,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 03:24:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-16 03:24:12,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 674 transitions. [2020-10-16 03:24:12,094 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674 [2020-10-16 03:24:12,094 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 674 transitions. [2020-10-16 03:24:12,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 674 transitions. [2020-10-16 03:24:12,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:12,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 674 transitions. [2020-10-16 03:24:12,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-16 03:24:12,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-16 03:24:12,098 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-16 03:24:12,099 INFO L185 Difference]: Start difference. First operand has 99 places, 70 transitions, 1090 flow. Second operand 10 states and 674 transitions. [2020-10-16 03:24:12,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 79 transitions, 1454 flow [2020-10-16 03:24:12,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 79 transitions, 1330 flow, removed 21 selfloop flow, removed 9 redundant places. [2020-10-16 03:24:12,117 INFO L241 Difference]: Finished difference. Result has 101 places, 72 transitions, 1060 flow [2020-10-16 03:24:12,118 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1060, PETRI_PLACES=101, PETRI_TRANSITIONS=72} [2020-10-16 03:24:12,118 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 83 predicate places. [2020-10-16 03:24:12,118 INFO L481 AbstractCegarLoop]: Abstraction has has 101 places, 72 transitions, 1060 flow [2020-10-16 03:24:12,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 03:24:12,118 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:12,118 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:12,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 03:24:12,332 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1491024660, now seen corresponding path program 14 times [2020-10-16 03:24:12,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:12,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902813847] [2020-10-16 03:24:12,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:12,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902813847] [2020-10-16 03:24:12,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928190470] [2020-10-16 03:24:12,389 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 [2020-10-16 03:24:12,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:12,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:12,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 03:24:12,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:12,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:12,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 03:24:12,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657869714] [2020-10-16 03:24:12,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 03:24:12,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:12,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 03:24:12,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 03:24:12,469 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:12,470 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 72 transitions, 1060 flow. Second operand 10 states. [2020-10-16 03:24:12,470 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:12,470 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:12,470 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:12,757 INFO L129 PetriNetUnfolder]: 65/162 cut-off events. [2020-10-16 03:24:12,757 INFO L130 PetriNetUnfolder]: For 2893/2899 co-relation queries the response was YES. [2020-10-16 03:24:12,759 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1357 conditions, 162 events. 65/162 cut-off events. For 2893/2899 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 625 event pairs, 0 based on Foata normal form. 8/170 useless extension candidates. Maximal degree in co-relation 1309. Up to 83 conditions per place. [2020-10-16 03:24:12,762 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 46 changer transitions 0/88 dead transitions. [2020-10-16 03:24:12,762 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 88 transitions, 1610 flow [2020-10-16 03:24:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 03:24:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-16 03:24:12,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1014 transitions. [2020-10-16 03:24:12,765 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 03:24:12,765 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1014 transitions. [2020-10-16 03:24:12,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1014 transitions. [2020-10-16 03:24:12,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:12,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1014 transitions. [2020-10-16 03:24:12,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-16 03:24:12,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-16 03:24:12,770 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-16 03:24:12,770 INFO L185 Difference]: Start difference. First operand has 101 places, 72 transitions, 1060 flow. Second operand 15 states and 1014 transitions. [2020-10-16 03:24:12,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 88 transitions, 1610 flow [2020-10-16 03:24:12,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 88 transitions, 1526 flow, removed 27 selfloop flow, removed 7 redundant places. [2020-10-16 03:24:12,788 INFO L241 Difference]: Finished difference. Result has 111 places, 76 transitions, 1211 flow [2020-10-16 03:24:12,789 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1211, PETRI_PLACES=111, PETRI_TRANSITIONS=76} [2020-10-16 03:24:12,789 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 93 predicate places. [2020-10-16 03:24:12,789 INFO L481 AbstractCegarLoop]: Abstraction has has 111 places, 76 transitions, 1211 flow [2020-10-16 03:24:12,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 03:24:12,789 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:12,789 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:13,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 03:24:13,004 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:13,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:13,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1389554911, now seen corresponding path program 15 times [2020-10-16 03:24:13,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:13,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136064766] [2020-10-16 03:24:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:13,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136064766] [2020-10-16 03:24:13,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650654478] [2020-10-16 03:24:13,081 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:13,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 03:24:13,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:13,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 03:24:13,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:13,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:13,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:13,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 03:24:13,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192412528] [2020-10-16 03:24:13,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 03:24:13,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:13,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 03:24:13,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 03:24:13,141 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:13,141 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 76 transitions, 1211 flow. Second operand 10 states. [2020-10-16 03:24:13,142 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:13,142 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:13,142 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:13,319 INFO L129 PetriNetUnfolder]: 67/167 cut-off events. [2020-10-16 03:24:13,319 INFO L130 PetriNetUnfolder]: For 3566/3568 co-relation queries the response was YES. [2020-10-16 03:24:13,320 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1505 conditions, 167 events. 67/167 cut-off events. For 3566/3568 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 640 event pairs, 0 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 1454. Up to 87 conditions per place. [2020-10-16 03:24:13,323 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 50 selfloop transitions, 30 changer transitions 0/87 dead transitions. [2020-10-16 03:24:13,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 87 transitions, 1677 flow [2020-10-16 03:24:13,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:24:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:24:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 809 transitions. [2020-10-16 03:24:13,328 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741666666666667 [2020-10-16 03:24:13,329 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 809 transitions. [2020-10-16 03:24:13,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 809 transitions. [2020-10-16 03:24:13,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:13,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 809 transitions. [2020-10-16 03:24:13,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:24:13,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:24:13,334 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:24:13,334 INFO L185 Difference]: Start difference. First operand has 111 places, 76 transitions, 1211 flow. Second operand 12 states and 809 transitions. [2020-10-16 03:24:13,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 87 transitions, 1677 flow [2020-10-16 03:24:13,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 87 transitions, 1536 flow, removed 38 selfloop flow, removed 11 redundant places. [2020-10-16 03:24:13,355 INFO L241 Difference]: Finished difference. Result has 113 places, 78 transitions, 1210 flow [2020-10-16 03:24:13,355 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1210, PETRI_PLACES=113, PETRI_TRANSITIONS=78} [2020-10-16 03:24:13,355 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 95 predicate places. [2020-10-16 03:24:13,356 INFO L481 AbstractCegarLoop]: Abstraction has has 113 places, 78 transitions, 1210 flow [2020-10-16 03:24:13,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 03:24:13,356 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:13,356 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:13,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 03:24:13,570 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:13,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:13,570 INFO L82 PathProgramCache]: Analyzing trace with hash -470026489, now seen corresponding path program 16 times [2020-10-16 03:24:13,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:13,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758264451] [2020-10-16 03:24:13,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:13,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758264451] [2020-10-16 03:24:13,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943601770] [2020-10-16 03:24:13,657 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:13,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:24:13,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:13,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 03:24:13,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:13,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:13,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:13,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:13,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 03:24:13,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347725291] [2020-10-16 03:24:13,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:24:13,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:13,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:24:13,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:24:13,750 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:13,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 78 transitions, 1210 flow. Second operand 11 states. [2020-10-16 03:24:13,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:13,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:13,752 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:14,016 INFO L129 PetriNetUnfolder]: 71/179 cut-off events. [2020-10-16 03:24:14,016 INFO L130 PetriNetUnfolder]: For 4049/4051 co-relation queries the response was YES. [2020-10-16 03:24:14,018 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1621 conditions, 179 events. 71/179 cut-off events. For 4049/4051 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 714 event pairs, 0 based on Foata normal form. 4/183 useless extension candidates. Maximal degree in co-relation 1568. Up to 95 conditions per place. [2020-10-16 03:24:14,021 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 44 selfloop transitions, 40 changer transitions 0/91 dead transitions. [2020-10-16 03:24:14,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 91 transitions, 1722 flow [2020-10-16 03:24:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 03:24:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 03:24:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 877 transitions. [2020-10-16 03:24:14,024 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6746153846153846 [2020-10-16 03:24:14,024 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 877 transitions. [2020-10-16 03:24:14,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 877 transitions. [2020-10-16 03:24:14,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:14,025 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 877 transitions. [2020-10-16 03:24:14,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 03:24:14,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 03:24:14,028 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 03:24:14,029 INFO L185 Difference]: Start difference. First operand has 113 places, 78 transitions, 1210 flow. Second operand 13 states and 877 transitions. [2020-10-16 03:24:14,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 91 transitions, 1722 flow [2020-10-16 03:24:14,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 91 transitions, 1616 flow, removed 27 selfloop flow, removed 9 redundant places. [2020-10-16 03:24:14,051 INFO L241 Difference]: Finished difference. Result has 118 places, 82 transitions, 1306 flow [2020-10-16 03:24:14,052 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1306, PETRI_PLACES=118, PETRI_TRANSITIONS=82} [2020-10-16 03:24:14,052 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 100 predicate places. [2020-10-16 03:24:14,052 INFO L481 AbstractCegarLoop]: Abstraction has has 118 places, 82 transitions, 1306 flow [2020-10-16 03:24:14,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:24:14,052 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:14,053 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:14,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 03:24:14,266 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:14,266 INFO L82 PathProgramCache]: Analyzing trace with hash 17563211, now seen corresponding path program 17 times [2020-10-16 03:24:14,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:14,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135202981] [2020-10-16 03:24:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:14,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135202981] [2020-10-16 03:24:14,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126608455] [2020-10-16 03:24:14,328 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:14,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 03:24:14,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:14,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 03:24:14,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:14,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:14,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:14,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:14,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 03:24:14,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468630225] [2020-10-16 03:24:14,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:24:14,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:14,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:24:14,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:24:14,443 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:14,443 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 82 transitions, 1306 flow. Second operand 11 states. [2020-10-16 03:24:14,444 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:14,444 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:14,444 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:14,796 INFO L129 PetriNetUnfolder]: 75/188 cut-off events. [2020-10-16 03:24:14,797 INFO L130 PetriNetUnfolder]: For 4627/4629 co-relation queries the response was YES. [2020-10-16 03:24:14,799 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 188 events. 75/188 cut-off events. For 4627/4629 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 747 event pairs, 0 based on Foata normal form. 4/192 useless extension candidates. Maximal degree in co-relation 1704. Up to 101 conditions per place. [2020-10-16 03:24:14,802 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 20 selfloop transitions, 72 changer transitions 0/99 dead transitions. [2020-10-16 03:24:14,802 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 99 transitions, 1986 flow [2020-10-16 03:24:14,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 03:24:14,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-16 03:24:14,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1149 transitions. [2020-10-16 03:24:14,805 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758823529411765 [2020-10-16 03:24:14,806 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1149 transitions. [2020-10-16 03:24:14,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1149 transitions. [2020-10-16 03:24:14,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:14,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1149 transitions. [2020-10-16 03:24:14,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-16 03:24:14,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-16 03:24:14,813 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-16 03:24:14,814 INFO L185 Difference]: Start difference. First operand has 118 places, 82 transitions, 1306 flow. Second operand 17 states and 1149 transitions. [2020-10-16 03:24:14,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 99 transitions, 1986 flow [2020-10-16 03:24:14,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 99 transitions, 1838 flow, removed 42 selfloop flow, removed 10 redundant places. [2020-10-16 03:24:14,851 INFO L241 Difference]: Finished difference. Result has 127 places, 86 transitions, 1484 flow [2020-10-16 03:24:14,852 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1484, PETRI_PLACES=127, PETRI_TRANSITIONS=86} [2020-10-16 03:24:14,852 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 109 predicate places. [2020-10-16 03:24:14,852 INFO L481 AbstractCegarLoop]: Abstraction has has 127 places, 86 transitions, 1484 flow [2020-10-16 03:24:14,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:24:14,853 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:14,853 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:15,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:15,067 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:15,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:15,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1022892103, now seen corresponding path program 18 times [2020-10-16 03:24:15,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:15,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321753386] [2020-10-16 03:24:15,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:15,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:15,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321753386] [2020-10-16 03:24:15,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135546366] [2020-10-16 03:24:15,183 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:15,261 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 03:24:15,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:15,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 03:24:15,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:15,298 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:24:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:15,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:15,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 03:24:15,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660232906] [2020-10-16 03:24:15,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:24:15,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:15,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:24:15,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:24:15,312 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:15,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 86 transitions, 1484 flow. Second operand 11 states. [2020-10-16 03:24:15,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:15,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:15,314 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:15,602 INFO L129 PetriNetUnfolder]: 78/195 cut-off events. [2020-10-16 03:24:15,602 INFO L130 PetriNetUnfolder]: For 5048/5050 co-relation queries the response was YES. [2020-10-16 03:24:15,604 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 195 events. 78/195 cut-off events. For 5048/5050 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 783 event pairs, 0 based on Foata normal form. 3/198 useless extension candidates. Maximal degree in co-relation 1849. Up to 105 conditions per place. [2020-10-16 03:24:15,607 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 41 selfloop transitions, 54 changer transitions 0/102 dead transitions. [2020-10-16 03:24:15,607 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 102 transitions, 2138 flow [2020-10-16 03:24:15,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 03:24:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 03:24:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1081 transitions. [2020-10-16 03:24:15,610 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675625 [2020-10-16 03:24:15,610 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1081 transitions. [2020-10-16 03:24:15,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1081 transitions. [2020-10-16 03:24:15,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:15,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1081 transitions. [2020-10-16 03:24:15,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 03:24:15,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 03:24:15,614 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 03:24:15,615 INFO L185 Difference]: Start difference. First operand has 127 places, 86 transitions, 1484 flow. Second operand 16 states and 1081 transitions. [2020-10-16 03:24:15,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 102 transitions, 2138 flow [2020-10-16 03:24:15,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 102 transitions, 1940 flow, removed 45 selfloop flow, removed 13 redundant places. [2020-10-16 03:24:15,641 INFO L241 Difference]: Finished difference. Result has 131 places, 89 transitions, 1520 flow [2020-10-16 03:24:15,642 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1520, PETRI_PLACES=131, PETRI_TRANSITIONS=89} [2020-10-16 03:24:15,642 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 113 predicate places. [2020-10-16 03:24:15,642 INFO L481 AbstractCegarLoop]: Abstraction has has 131 places, 89 transitions, 1520 flow [2020-10-16 03:24:15,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:24:15,642 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:15,643 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:15,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:15,856 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:15,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:15,857 INFO L82 PathProgramCache]: Analyzing trace with hash 544475848, now seen corresponding path program 19 times [2020-10-16 03:24:15,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:15,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195543902] [2020-10-16 03:24:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:15,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195543902] [2020-10-16 03:24:15,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897766874] [2020-10-16 03:24:15,926 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:15,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:24:15,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:16,027 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:24:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:16,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:16,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 03:24:16,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070615683] [2020-10-16 03:24:16,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 03:24:16,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:16,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 03:24:16,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 03:24:16,042 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:16,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 89 transitions, 1520 flow. Second operand 12 states. [2020-10-16 03:24:16,042 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:16,042 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:16,043 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:16,364 INFO L129 PetriNetUnfolder]: 81/202 cut-off events. [2020-10-16 03:24:16,364 INFO L130 PetriNetUnfolder]: For 5395/5397 co-relation queries the response was YES. [2020-10-16 03:24:16,366 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 202 events. 81/202 cut-off events. For 5395/5397 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 816 event pairs, 0 based on Foata normal form. 1/203 useless extension candidates. Maximal degree in co-relation 1933. Up to 109 conditions per place. [2020-10-16 03:24:16,370 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 23 selfloop transitions, 76 changer transitions 0/106 dead transitions. [2020-10-16 03:24:16,370 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 106 transitions, 2254 flow [2020-10-16 03:24:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 03:24:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 03:24:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1081 transitions. [2020-10-16 03:24:16,372 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675625 [2020-10-16 03:24:16,373 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1081 transitions. [2020-10-16 03:24:16,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1081 transitions. [2020-10-16 03:24:16,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:16,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1081 transitions. [2020-10-16 03:24:16,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 03:24:16,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 03:24:16,378 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 03:24:16,378 INFO L185 Difference]: Start difference. First operand has 131 places, 89 transitions, 1520 flow. Second operand 16 states and 1081 transitions. [2020-10-16 03:24:16,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 106 transitions, 2254 flow [2020-10-16 03:24:16,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 106 transitions, 2091 flow, removed 39 selfloop flow, removed 13 redundant places. [2020-10-16 03:24:16,407 INFO L241 Difference]: Finished difference. Result has 135 places, 92 transitions, 1647 flow [2020-10-16 03:24:16,407 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1647, PETRI_PLACES=135, PETRI_TRANSITIONS=92} [2020-10-16 03:24:16,408 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 117 predicate places. [2020-10-16 03:24:16,408 INFO L481 AbstractCegarLoop]: Abstraction has has 135 places, 92 transitions, 1647 flow [2020-10-16 03:24:16,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 03:24:16,408 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:16,408 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:16,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:16,623 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:16,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:16,623 INFO L82 PathProgramCache]: Analyzing trace with hash 973804627, now seen corresponding path program 20 times [2020-10-16 03:24:16,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:16,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221547038] [2020-10-16 03:24:16,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:16,712 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:16,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221547038] [2020-10-16 03:24:16,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704548094] [2020-10-16 03:24:16,712 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:16,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:16,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:24:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:16,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:16,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 03:24:16,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925209618] [2020-10-16 03:24:16,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:24:16,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:16,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:24:16,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:24:16,787 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:16,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 92 transitions, 1647 flow. Second operand 11 states. [2020-10-16 03:24:16,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:16,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:16,788 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:16,993 INFO L129 PetriNetUnfolder]: 83/208 cut-off events. [2020-10-16 03:24:16,993 INFO L130 PetriNetUnfolder]: For 5951/5953 co-relation queries the response was YES. [2020-10-16 03:24:16,995 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 208 events. 83/208 cut-off events. For 5951/5953 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 846 event pairs, 0 based on Foata normal form. 4/212 useless extension candidates. Maximal degree in co-relation 2033. Up to 124 conditions per place. [2020-10-16 03:24:16,999 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 77 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2020-10-16 03:24:16,999 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 103 transitions, 2207 flow [2020-10-16 03:24:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 03:24:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 03:24:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 808 transitions. [2020-10-16 03:24:17,001 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2020-10-16 03:24:17,001 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 808 transitions. [2020-10-16 03:24:17,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 808 transitions. [2020-10-16 03:24:17,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:17,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 808 transitions. [2020-10-16 03:24:17,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 03:24:17,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 03:24:17,005 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 03:24:17,006 INFO L185 Difference]: Start difference. First operand has 135 places, 92 transitions, 1647 flow. Second operand 12 states and 808 transitions. [2020-10-16 03:24:17,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 103 transitions, 2207 flow [2020-10-16 03:24:17,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 103 transitions, 2013 flow, removed 32 selfloop flow, removed 13 redundant places. [2020-10-16 03:24:17,043 INFO L241 Difference]: Finished difference. Result has 135 places, 94 transitions, 1569 flow [2020-10-16 03:24:17,044 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1569, PETRI_PLACES=135, PETRI_TRANSITIONS=94} [2020-10-16 03:24:17,044 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 117 predicate places. [2020-10-16 03:24:17,044 INFO L481 AbstractCegarLoop]: Abstraction has has 135 places, 94 transitions, 1569 flow [2020-10-16 03:24:17,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:24:17,044 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:17,045 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:17,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 03:24:17,258 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:17,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1417527963, now seen corresponding path program 21 times [2020-10-16 03:24:17,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:17,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889912899] [2020-10-16 03:24:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:17,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889912899] [2020-10-16 03:24:17,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982286210] [2020-10-16 03:24:17,339 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:17,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 03:24:17,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:17,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:24:17,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:17,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:17,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 03:24:17,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70617971] [2020-10-16 03:24:17,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:24:17,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:17,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:24:17,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:24:17,406 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:17,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 94 transitions, 1569 flow. Second operand 11 states. [2020-10-16 03:24:17,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:17,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:17,407 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:17,662 INFO L129 PetriNetUnfolder]: 87/218 cut-off events. [2020-10-16 03:24:17,662 INFO L130 PetriNetUnfolder]: For 7106/7108 co-relation queries the response was YES. [2020-10-16 03:24:17,665 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2217 conditions, 218 events. 87/218 cut-off events. For 7106/7108 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 891 event pairs, 0 based on Foata normal form. 4/222 useless extension candidates. Maximal degree in co-relation 2154. Up to 121 conditions per place. [2020-10-16 03:24:17,668 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 66 selfloop transitions, 37 changer transitions 0/110 dead transitions. [2020-10-16 03:24:17,669 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 110 transitions, 2277 flow [2020-10-16 03:24:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 03:24:17,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 03:24:17,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1079 transitions. [2020-10-16 03:24:17,671 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674375 [2020-10-16 03:24:17,671 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1079 transitions. [2020-10-16 03:24:17,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1079 transitions. [2020-10-16 03:24:17,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:17,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1079 transitions. [2020-10-16 03:24:17,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 03:24:17,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 03:24:17,676 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 03:24:17,676 INFO L185 Difference]: Start difference. First operand has 135 places, 94 transitions, 1569 flow. Second operand 16 states and 1079 transitions. [2020-10-16 03:24:17,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 110 transitions, 2277 flow [2020-10-16 03:24:17,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 110 transitions, 2171 flow, removed 36 selfloop flow, removed 9 redundant places. [2020-10-16 03:24:17,711 INFO L241 Difference]: Finished difference. Result has 146 places, 99 transitions, 1699 flow [2020-10-16 03:24:17,711 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1699, PETRI_PLACES=146, PETRI_TRANSITIONS=99} [2020-10-16 03:24:17,711 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 128 predicate places. [2020-10-16 03:24:17,712 INFO L481 AbstractCegarLoop]: Abstraction has has 146 places, 99 transitions, 1699 flow [2020-10-16 03:24:17,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:24:17,712 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:17,712 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:17,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 03:24:17,927 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:17,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:17,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1644884649, now seen corresponding path program 22 times [2020-10-16 03:24:17,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:17,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533622210] [2020-10-16 03:24:17,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:17,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533622210] [2020-10-16 03:24:17,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300113626] [2020-10-16 03:24:17,996 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:18,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:24:18,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:18,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:24:18,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:18,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:18,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 03:24:18,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563436074] [2020-10-16 03:24:18,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 03:24:18,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:18,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 03:24:18,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 03:24:18,085 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:18,086 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 99 transitions, 1699 flow. Second operand 11 states. [2020-10-16 03:24:18,086 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:18,086 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:18,086 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:18,425 INFO L129 PetriNetUnfolder]: 96/239 cut-off events. [2020-10-16 03:24:18,425 INFO L130 PetriNetUnfolder]: For 8833/8835 co-relation queries the response was YES. [2020-10-16 03:24:18,427 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2578 conditions, 239 events. 96/239 cut-off events. For 8833/8835 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 958 event pairs, 0 based on Foata normal form. 4/243 useless extension candidates. Maximal degree in co-relation 2510. Up to 135 conditions per place. [2020-10-16 03:24:18,431 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 38 selfloop transitions, 76 changer transitions 0/121 dead transitions. [2020-10-16 03:24:18,431 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 121 transitions, 2717 flow [2020-10-16 03:24:18,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 03:24:18,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 03:24:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1352 transitions. [2020-10-16 03:24:18,434 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 03:24:18,435 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1352 transitions. [2020-10-16 03:24:18,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1352 transitions. [2020-10-16 03:24:18,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:18,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1352 transitions. [2020-10-16 03:24:18,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 03:24:18,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 03:24:18,440 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 03:24:18,440 INFO L185 Difference]: Start difference. First operand has 146 places, 99 transitions, 1699 flow. Second operand 20 states and 1352 transitions. [2020-10-16 03:24:18,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 121 transitions, 2717 flow [2020-10-16 03:24:18,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 121 transitions, 2559 flow, removed 52 selfloop flow, removed 10 redundant places. [2020-10-16 03:24:18,477 INFO L241 Difference]: Finished difference. Result has 159 places, 105 transitions, 1985 flow [2020-10-16 03:24:18,477 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1985, PETRI_PLACES=159, PETRI_TRANSITIONS=105} [2020-10-16 03:24:18,477 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 141 predicate places. [2020-10-16 03:24:18,477 INFO L481 AbstractCegarLoop]: Abstraction has has 159 places, 105 transitions, 1985 flow [2020-10-16 03:24:18,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 03:24:18,478 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:18,478 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:18,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 03:24:18,693 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:18,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:18,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1644901389, now seen corresponding path program 23 times [2020-10-16 03:24:18,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:18,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494228572] [2020-10-16 03:24:18,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:18,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494228572] [2020-10-16 03:24:18,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423172205] [2020-10-16 03:24:18,757 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 [2020-10-16 03:24:18,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 03:24:18,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:18,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 03:24:18,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:18,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:18,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:18,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 03:24:18,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721205923] [2020-10-16 03:24:18,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 03:24:18,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:18,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 03:24:18,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 03:24:18,840 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:18,841 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 105 transitions, 1985 flow. Second operand 12 states. [2020-10-16 03:24:18,841 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:18,841 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:18,841 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:19,251 INFO L129 PetriNetUnfolder]: 93/234 cut-off events. [2020-10-16 03:24:19,251 INFO L130 PetriNetUnfolder]: For 9769/9775 co-relation queries the response was YES. [2020-10-16 03:24:19,253 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2636 conditions, 234 events. 93/234 cut-off events. For 9769/9775 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 971 event pairs, 0 based on Foata normal form. 8/242 useless extension candidates. Maximal degree in co-relation 2564. Up to 131 conditions per place. [2020-10-16 03:24:19,257 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 38 selfloop transitions, 76 changer transitions 0/121 dead transitions. [2020-10-16 03:24:19,257 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 121 transitions, 2843 flow [2020-10-16 03:24:19,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 03:24:19,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 03:24:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1284 transitions. [2020-10-16 03:24:19,260 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757894736842105 [2020-10-16 03:24:19,260 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1284 transitions. [2020-10-16 03:24:19,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1284 transitions. [2020-10-16 03:24:19,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:19,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1284 transitions. [2020-10-16 03:24:19,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 03:24:19,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 03:24:19,265 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 03:24:19,265 INFO L185 Difference]: Start difference. First operand has 159 places, 105 transitions, 1985 flow. Second operand 19 states and 1284 transitions. [2020-10-16 03:24:19,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 121 transitions, 2843 flow [2020-10-16 03:24:19,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 121 transitions, 2565 flow, removed 80 selfloop flow, removed 17 redundant places. [2020-10-16 03:24:19,311 INFO L241 Difference]: Finished difference. Result has 162 places, 106 transitions, 1941 flow [2020-10-16 03:24:19,311 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1941, PETRI_PLACES=162, PETRI_TRANSITIONS=106} [2020-10-16 03:24:19,311 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 144 predicate places. [2020-10-16 03:24:19,312 INFO L481 AbstractCegarLoop]: Abstraction has has 162 places, 106 transitions, 1941 flow [2020-10-16 03:24:19,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 03:24:19,312 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:19,312 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:19,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 03:24:19,526 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:19,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:19,527 INFO L82 PathProgramCache]: Analyzing trace with hash 372575520, now seen corresponding path program 24 times [2020-10-16 03:24:19,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:19,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592160114] [2020-10-16 03:24:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:19,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592160114] [2020-10-16 03:24:19,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17700676] [2020-10-16 03:24:19,628 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:19,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 03:24:19,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:19,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:24:19,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:19,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:19,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 03:24:19,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944254760] [2020-10-16 03:24:19,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 03:24:19,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:19,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 03:24:19,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 03:24:19,697 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:19,697 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 106 transitions, 1941 flow. Second operand 12 states. [2020-10-16 03:24:19,698 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:19,698 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:19,698 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:19,913 INFO L129 PetriNetUnfolder]: 95/240 cut-off events. [2020-10-16 03:24:19,913 INFO L130 PetriNetUnfolder]: For 10532/10534 co-relation queries the response was YES. [2020-10-16 03:24:19,916 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2705 conditions, 240 events. 95/240 cut-off events. For 10532/10534 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1000 event pairs, 0 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 2633. Up to 133 conditions per place. [2020-10-16 03:24:19,920 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 78 selfloop transitions, 34 changer transitions 0/119 dead transitions. [2020-10-16 03:24:19,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 119 transitions, 2681 flow [2020-10-16 03:24:19,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 03:24:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-16 03:24:19,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 943 transitions. [2020-10-16 03:24:19,922 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6735714285714286 [2020-10-16 03:24:19,923 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 943 transitions. [2020-10-16 03:24:19,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 943 transitions. [2020-10-16 03:24:19,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:19,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 943 transitions. [2020-10-16 03:24:19,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-16 03:24:19,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-16 03:24:19,926 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-16 03:24:19,926 INFO L185 Difference]: Start difference. First operand has 162 places, 106 transitions, 1941 flow. Second operand 14 states and 943 transitions. [2020-10-16 03:24:19,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 119 transitions, 2681 flow [2020-10-16 03:24:19,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 119 transitions, 2463 flow, removed 41 selfloop flow, removed 17 redundant places. [2020-10-16 03:24:19,969 INFO L241 Difference]: Finished difference. Result has 160 places, 108 transitions, 1919 flow [2020-10-16 03:24:19,970 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1919, PETRI_PLACES=160, PETRI_TRANSITIONS=108} [2020-10-16 03:24:19,970 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 142 predicate places. [2020-10-16 03:24:19,970 INFO L481 AbstractCegarLoop]: Abstraction has has 160 places, 108 transitions, 1919 flow [2020-10-16 03:24:19,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 03:24:19,970 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:19,970 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:20,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 03:24:20,185 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:20,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:20,185 INFO L82 PathProgramCache]: Analyzing trace with hash -723873914, now seen corresponding path program 25 times [2020-10-16 03:24:20,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:20,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130830521] [2020-10-16 03:24:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:20,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:20,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130830521] [2020-10-16 03:24:20,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083505395] [2020-10-16 03:24:20,305 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:20,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:24:20,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:20,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:20,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:20,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 03:24:20,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447797851] [2020-10-16 03:24:20,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:24:20,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:20,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:24:20,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:24:20,391 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:20,392 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 108 transitions, 1919 flow. Second operand 13 states. [2020-10-16 03:24:20,392 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:20,392 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:20,392 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:20,688 INFO L129 PetriNetUnfolder]: 99/251 cut-off events. [2020-10-16 03:24:20,688 INFO L130 PetriNetUnfolder]: For 10493/10499 co-relation queries the response was YES. [2020-10-16 03:24:20,690 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2772 conditions, 251 events. 99/251 cut-off events. For 10493/10499 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1068 event pairs, 0 based on Foata normal form. 8/259 useless extension candidates. Maximal degree in co-relation 2698. Up to 141 conditions per place. [2020-10-16 03:24:20,694 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 68 selfloop transitions, 48 changer transitions 0/123 dead transitions. [2020-10-16 03:24:20,694 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 123 transitions, 2688 flow [2020-10-16 03:24:20,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 03:24:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-16 03:24:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1011 transitions. [2020-10-16 03:24:20,696 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674 [2020-10-16 03:24:20,697 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1011 transitions. [2020-10-16 03:24:20,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1011 transitions. [2020-10-16 03:24:20,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:20,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1011 transitions. [2020-10-16 03:24:20,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-16 03:24:20,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-16 03:24:20,700 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-16 03:24:20,700 INFO L185 Difference]: Start difference. First operand has 160 places, 108 transitions, 1919 flow. Second operand 15 states and 1011 transitions. [2020-10-16 03:24:20,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 123 transitions, 2688 flow [2020-10-16 03:24:20,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 123 transitions, 2556 flow, removed 36 selfloop flow, removed 11 redundant places. [2020-10-16 03:24:20,744 INFO L241 Difference]: Finished difference. Result has 165 places, 112 transitions, 2032 flow [2020-10-16 03:24:20,745 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2032, PETRI_PLACES=165, PETRI_TRANSITIONS=112} [2020-10-16 03:24:20,745 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 147 predicate places. [2020-10-16 03:24:20,745 INFO L481 AbstractCegarLoop]: Abstraction has has 165 places, 112 transitions, 2032 flow [2020-10-16 03:24:20,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:24:20,745 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:20,745 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:20,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:20,959 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:20,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash -301607478, now seen corresponding path program 26 times [2020-10-16 03:24:20,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:20,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209761776] [2020-10-16 03:24:20,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:21,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209761776] [2020-10-16 03:24:21,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539519164] [2020-10-16 03:24:21,049 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:21,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:21,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:21,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:24:21,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:21,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:21,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:21,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 03:24:21,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866333243] [2020-10-16 03:24:21,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:24:21,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:21,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:24:21,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:24:21,142 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:21,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 112 transitions, 2032 flow. Second operand 13 states. [2020-10-16 03:24:21,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:21,143 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:21,143 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:21,564 INFO L129 PetriNetUnfolder]: 103/263 cut-off events. [2020-10-16 03:24:21,564 INFO L130 PetriNetUnfolder]: For 11578/11584 co-relation queries the response was YES. [2020-10-16 03:24:21,567 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2967 conditions, 263 events. 103/263 cut-off events. For 11578/11584 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1136 event pairs, 0 based on Foata normal form. 8/271 useless extension candidates. Maximal degree in co-relation 2891. Up to 149 conditions per place. [2020-10-16 03:24:21,571 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 36 selfloop transitions, 88 changer transitions 0/131 dead transitions. [2020-10-16 03:24:21,571 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 131 transitions, 2989 flow [2020-10-16 03:24:21,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 03:24:21,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 03:24:21,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1283 transitions. [2020-10-16 03:24:21,573 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752631578947368 [2020-10-16 03:24:21,573 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1283 transitions. [2020-10-16 03:24:21,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1283 transitions. [2020-10-16 03:24:21,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:21,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1283 transitions. [2020-10-16 03:24:21,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 03:24:21,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 03:24:21,579 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 03:24:21,579 INFO L185 Difference]: Start difference. First operand has 165 places, 112 transitions, 2032 flow. Second operand 19 states and 1283 transitions. [2020-10-16 03:24:21,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 131 transitions, 2989 flow [2020-10-16 03:24:21,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 131 transitions, 2811 flow, removed 49 selfloop flow, removed 12 redundant places. [2020-10-16 03:24:21,630 INFO L241 Difference]: Finished difference. Result has 173 places, 116 transitions, 2211 flow [2020-10-16 03:24:21,630 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2211, PETRI_PLACES=173, PETRI_TRANSITIONS=116} [2020-10-16 03:24:21,630 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 155 predicate places. [2020-10-16 03:24:21,630 INFO L481 AbstractCegarLoop]: Abstraction has has 173 places, 116 transitions, 2211 flow [2020-10-16 03:24:21,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:24:21,630 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:21,631 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:21,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 03:24:21,839 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:21,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:21,839 INFO L82 PathProgramCache]: Analyzing trace with hash -301117368, now seen corresponding path program 27 times [2020-10-16 03:24:21,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:21,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078576794] [2020-10-16 03:24:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:21,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078576794] [2020-10-16 03:24:21,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510774796] [2020-10-16 03:24:21,928 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:22,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 03:24:22,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:22,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 03:24:22,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:22,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:22,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:22,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 03:24:22,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401196990] [2020-10-16 03:24:22,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 03:24:22,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:22,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 03:24:22,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 03:24:22,054 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:22,056 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 116 transitions, 2211 flow. Second operand 12 states. [2020-10-16 03:24:22,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:22,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:22,057 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:22,413 INFO L129 PetriNetUnfolder]: 112/285 cut-off events. [2020-10-16 03:24:22,413 INFO L130 PetriNetUnfolder]: For 12865/12871 co-relation queries the response was YES. [2020-10-16 03:24:22,415 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3343 conditions, 285 events. 112/285 cut-off events. For 12865/12871 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1236 event pairs, 0 based on Foata normal form. 5/290 useless extension candidates. Maximal degree in co-relation 3265. Up to 163 conditions per place. [2020-10-16 03:24:22,418 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 29 selfloop transitions, 104 changer transitions 0/140 dead transitions. [2020-10-16 03:24:22,418 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 140 transitions, 3429 flow [2020-10-16 03:24:22,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 03:24:22,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 03:24:22,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1352 transitions. [2020-10-16 03:24:22,420 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 03:24:22,420 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1352 transitions. [2020-10-16 03:24:22,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1352 transitions. [2020-10-16 03:24:22,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:22,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1352 transitions. [2020-10-16 03:24:22,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 03:24:22,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 03:24:22,425 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 03:24:22,425 INFO L185 Difference]: Start difference. First operand has 173 places, 116 transitions, 2211 flow. Second operand 20 states and 1352 transitions. [2020-10-16 03:24:22,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 140 transitions, 3429 flow [2020-10-16 03:24:22,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 140 transitions, 3165 flow, removed 58 selfloop flow, removed 16 redundant places. [2020-10-16 03:24:22,474 INFO L241 Difference]: Finished difference. Result has 180 places, 122 transitions, 2485 flow [2020-10-16 03:24:22,475 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2485, PETRI_PLACES=180, PETRI_TRANSITIONS=122} [2020-10-16 03:24:22,475 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 162 predicate places. [2020-10-16 03:24:22,475 INFO L481 AbstractCegarLoop]: Abstraction has has 180 places, 122 transitions, 2485 flow [2020-10-16 03:24:22,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 03:24:22,475 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:22,475 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:22,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 03:24:22,686 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:22,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2103231458, now seen corresponding path program 28 times [2020-10-16 03:24:22,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:22,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938857228] [2020-10-16 03:24:22,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:22,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938857228] [2020-10-16 03:24:22,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021752661] [2020-10-16 03:24:22,767 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:22,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 03:24:22,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:22,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:24:22,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:22,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:22,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:22,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 03:24:22,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112775892] [2020-10-16 03:24:22,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:24:22,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:22,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:24:22,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:24:22,864 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:22,864 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 122 transitions, 2485 flow. Second operand 13 states. [2020-10-16 03:24:22,865 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:22,865 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:22,865 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:23,328 INFO L129 PetriNetUnfolder]: 109/279 cut-off events. [2020-10-16 03:24:23,328 INFO L130 PetriNetUnfolder]: For 14260/14262 co-relation queries the response was YES. [2020-10-16 03:24:23,331 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3394 conditions, 279 events. 109/279 cut-off events. For 14260/14262 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1241 event pairs, 0 based on Foata normal form. 4/283 useless extension candidates. Maximal degree in co-relation 3312. Up to 159 conditions per place. [2020-10-16 03:24:23,334 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 27 selfloop transitions, 106 changer transitions 0/140 dead transitions. [2020-10-16 03:24:23,334 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 140 transitions, 3525 flow [2020-10-16 03:24:23,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 03:24:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-16 03:24:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1419 transitions. [2020-10-16 03:24:23,336 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757142857142857 [2020-10-16 03:24:23,336 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1419 transitions. [2020-10-16 03:24:23,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1419 transitions. [2020-10-16 03:24:23,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:23,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1419 transitions. [2020-10-16 03:24:23,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-16 03:24:23,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-16 03:24:23,340 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-16 03:24:23,340 INFO L185 Difference]: Start difference. First operand has 180 places, 122 transitions, 2485 flow. Second operand 21 states and 1419 transitions. [2020-10-16 03:24:23,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 140 transitions, 3525 flow [2020-10-16 03:24:23,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 140 transitions, 3197 flow, removed 85 selfloop flow, removed 15 redundant places. [2020-10-16 03:24:23,383 INFO L241 Difference]: Finished difference. Result has 187 places, 123 transitions, 2463 flow [2020-10-16 03:24:23,384 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2463, PETRI_PLACES=187, PETRI_TRANSITIONS=123} [2020-10-16 03:24:23,384 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 169 predicate places. [2020-10-16 03:24:23,384 INFO L481 AbstractCegarLoop]: Abstraction has has 187 places, 123 transitions, 2463 flow [2020-10-16 03:24:23,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:24:23,384 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:23,384 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:23,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:23,592 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:23,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:23,593 INFO L82 PathProgramCache]: Analyzing trace with hash -547648186, now seen corresponding path program 29 times [2020-10-16 03:24:23,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:23,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870149162] [2020-10-16 03:24:23,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:23,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870149162] [2020-10-16 03:24:23,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786982716] [2020-10-16 03:24:23,668 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:23,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 03:24:23,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:23,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 03:24:23,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:23,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 03:24:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:23,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:23,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 03:24:23,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519321595] [2020-10-16 03:24:23,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:24:23,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:23,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:24:23,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:24:23,749 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:23,750 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 123 transitions, 2463 flow. Second operand 13 states. [2020-10-16 03:24:23,750 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:23,750 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:23,750 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:24,176 INFO L129 PetriNetUnfolder]: 112/284 cut-off events. [2020-10-16 03:24:24,177 INFO L130 PetriNetUnfolder]: For 15335/15337 co-relation queries the response was YES. [2020-10-16 03:24:24,179 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3505 conditions, 284 events. 112/284 cut-off events. For 15335/15337 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1256 event pairs, 0 based on Foata normal form. 3/287 useless extension candidates. Maximal degree in co-relation 3421. Up to 161 conditions per place. [2020-10-16 03:24:24,184 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 49 selfloop transitions, 86 changer transitions 0/142 dead transitions. [2020-10-16 03:24:24,184 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 142 transitions, 3559 flow [2020-10-16 03:24:24,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 03:24:24,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 03:24:24,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1351 transitions. [2020-10-16 03:24:24,193 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755 [2020-10-16 03:24:24,193 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1351 transitions. [2020-10-16 03:24:24,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1351 transitions. [2020-10-16 03:24:24,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:24,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1351 transitions. [2020-10-16 03:24:24,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 03:24:24,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 03:24:24,204 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 03:24:24,204 INFO L185 Difference]: Start difference. First operand has 187 places, 123 transitions, 2463 flow. Second operand 20 states and 1351 transitions. [2020-10-16 03:24:24,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 142 transitions, 3559 flow [2020-10-16 03:24:24,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 142 transitions, 3275 flow, removed 50 selfloop flow, removed 18 redundant places. [2020-10-16 03:24:24,273 INFO L241 Difference]: Finished difference. Result has 190 places, 126 transitions, 2559 flow [2020-10-16 03:24:24,274 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2235, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2559, PETRI_PLACES=190, PETRI_TRANSITIONS=126} [2020-10-16 03:24:24,274 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 172 predicate places. [2020-10-16 03:24:24,274 INFO L481 AbstractCegarLoop]: Abstraction has has 190 places, 126 transitions, 2559 flow [2020-10-16 03:24:24,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:24:24,275 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:24,275 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:24,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:24,490 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:24,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:24,490 INFO L82 PathProgramCache]: Analyzing trace with hash -744168569, now seen corresponding path program 30 times [2020-10-16 03:24:24,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:24,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723924915] [2020-10-16 03:24:24,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:24,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723924915] [2020-10-16 03:24:24,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115417693] [2020-10-16 03:24:24,571 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:24,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 03:24:24,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:24,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 03:24:24,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:24,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:24,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 03:24:24,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245885329] [2020-10-16 03:24:24,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 03:24:24,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:24,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 03:24:24,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-16 03:24:24,664 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:24,664 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 126 transitions, 2559 flow. Second operand 14 states. [2020-10-16 03:24:24,664 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:24,664 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:24,664 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:25,163 INFO L129 PetriNetUnfolder]: 115/291 cut-off events. [2020-10-16 03:24:25,163 INFO L130 PetriNetUnfolder]: For 14738/14740 co-relation queries the response was YES. [2020-10-16 03:24:25,166 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3553 conditions, 291 events. 115/291 cut-off events. For 14738/14740 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1295 event pairs, 0 based on Foata normal form. 3/294 useless extension candidates. Maximal degree in co-relation 3467. Up to 165 conditions per place. [2020-10-16 03:24:25,170 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 28 selfloop transitions, 112 changer transitions 0/147 dead transitions. [2020-10-16 03:24:25,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 147 transitions, 3731 flow [2020-10-16 03:24:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 03:24:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-16 03:24:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1486 transitions. [2020-10-16 03:24:25,172 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754545454545454 [2020-10-16 03:24:25,172 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1486 transitions. [2020-10-16 03:24:25,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1486 transitions. [2020-10-16 03:24:25,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:25,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1486 transitions. [2020-10-16 03:24:25,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-16 03:24:25,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-16 03:24:25,176 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-16 03:24:25,176 INFO L185 Difference]: Start difference. First operand has 190 places, 126 transitions, 2559 flow. Second operand 22 states and 1486 transitions. [2020-10-16 03:24:25,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 147 transitions, 3731 flow [2020-10-16 03:24:25,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 147 transitions, 3515 flow, removed 37 selfloop flow, removed 17 redundant places. [2020-10-16 03:24:25,226 INFO L241 Difference]: Finished difference. Result has 196 places, 129 transitions, 2731 flow [2020-10-16 03:24:25,226 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2731, PETRI_PLACES=196, PETRI_TRANSITIONS=129} [2020-10-16 03:24:25,227 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 178 predicate places. [2020-10-16 03:24:25,227 INFO L481 AbstractCegarLoop]: Abstraction has has 196 places, 129 transitions, 2731 flow [2020-10-16 03:24:25,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 03:24:25,227 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:25,227 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:25,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 03:24:25,428 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:25,428 INFO L82 PathProgramCache]: Analyzing trace with hash -476608046, now seen corresponding path program 31 times [2020-10-16 03:24:25,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:25,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82788757] [2020-10-16 03:24:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:25,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82788757] [2020-10-16 03:24:25,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386689905] [2020-10-16 03:24:25,532 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:25,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 03:24:25,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:25,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:25,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 03:24:25,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391589603] [2020-10-16 03:24:25,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:24:25,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:25,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:24:25,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:24:25,605 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:25,605 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 129 transitions, 2731 flow. Second operand 13 states. [2020-10-16 03:24:25,605 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:25,605 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:25,605 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:25,879 INFO L129 PetriNetUnfolder]: 117/296 cut-off events. [2020-10-16 03:24:25,880 INFO L130 PetriNetUnfolder]: For 16584/16586 co-relation queries the response was YES. [2020-10-16 03:24:25,885 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3744 conditions, 296 events. 117/296 cut-off events. For 16584/16586 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1297 event pairs, 0 based on Foata normal form. 4/300 useless extension candidates. Maximal degree in co-relation 3656. Up to 184 conditions per place. [2020-10-16 03:24:25,904 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 114 selfloop transitions, 21 changer transitions 0/142 dead transitions. [2020-10-16 03:24:25,905 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 142 transitions, 3591 flow [2020-10-16 03:24:25,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 03:24:25,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-16 03:24:25,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 942 transitions. [2020-10-16 03:24:25,907 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6728571428571428 [2020-10-16 03:24:25,908 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 942 transitions. [2020-10-16 03:24:25,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 942 transitions. [2020-10-16 03:24:25,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:25,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 942 transitions. [2020-10-16 03:24:25,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-16 03:24:25,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-16 03:24:25,914 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-16 03:24:25,914 INFO L185 Difference]: Start difference. First operand has 196 places, 129 transitions, 2731 flow. Second operand 14 states and 942 transitions. [2020-10-16 03:24:25,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 142 transitions, 3591 flow [2020-10-16 03:24:25,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 142 transitions, 3315 flow, removed 42 selfloop flow, removed 19 redundant places. [2020-10-16 03:24:25,999 INFO L241 Difference]: Finished difference. Result has 192 places, 131 transitions, 2599 flow [2020-10-16 03:24:25,999 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2599, PETRI_PLACES=192, PETRI_TRANSITIONS=131} [2020-10-16 03:24:26,000 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 174 predicate places. [2020-10-16 03:24:26,000 INFO L481 AbstractCegarLoop]: Abstraction has has 192 places, 131 transitions, 2599 flow [2020-10-16 03:24:26,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:24:26,001 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:26,001 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:26,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:26,215 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:26,216 INFO L82 PathProgramCache]: Analyzing trace with hash 202775946, now seen corresponding path program 32 times [2020-10-16 03:24:26,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:26,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244592074] [2020-10-16 03:24:26,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:26,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244592074] [2020-10-16 03:24:26,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242722444] [2020-10-16 03:24:26,303 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:26,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 03:24:26,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:26,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 03:24:26,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:26,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:26,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 03:24:26,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56029075] [2020-10-16 03:24:26,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 03:24:26,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:26,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 03:24:26,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-16 03:24:26,372 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:26,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 131 transitions, 2599 flow. Second operand 13 states. [2020-10-16 03:24:26,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:26,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:26,375 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:26,803 INFO L129 PetriNetUnfolder]: 128/323 cut-off events. [2020-10-16 03:24:26,804 INFO L130 PetriNetUnfolder]: For 20424/20426 co-relation queries the response was YES. [2020-10-16 03:24:26,806 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4187 conditions, 323 events. 128/323 cut-off events. For 20424/20426 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1423 event pairs, 0 based on Foata normal form. 4/327 useless extension candidates. Maximal degree in co-relation 4097. Up to 187 conditions per place. [2020-10-16 03:24:26,810 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 49 selfloop transitions, 103 changer transitions 0/159 dead transitions. [2020-10-16 03:24:26,811 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 159 transitions, 4154 flow [2020-10-16 03:24:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 03:24:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 03:24:26,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1622 transitions. [2020-10-16 03:24:26,813 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 03:24:26,813 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1622 transitions. [2020-10-16 03:24:26,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1622 transitions. [2020-10-16 03:24:26,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:26,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1622 transitions. [2020-10-16 03:24:26,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 03:24:26,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 03:24:26,818 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 03:24:26,818 INFO L185 Difference]: Start difference. First operand has 192 places, 131 transitions, 2599 flow. Second operand 24 states and 1622 transitions. [2020-10-16 03:24:26,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 159 transitions, 4154 flow [2020-10-16 03:24:26,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 159 transitions, 4016 flow, removed 50 selfloop flow, removed 11 redundant places. [2020-10-16 03:24:26,894 INFO L241 Difference]: Finished difference. Result has 208 places, 139 transitions, 3045 flow [2020-10-16 03:24:26,895 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3045, PETRI_PLACES=208, PETRI_TRANSITIONS=139} [2020-10-16 03:24:26,895 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 190 predicate places. [2020-10-16 03:24:26,895 INFO L481 AbstractCegarLoop]: Abstraction has has 208 places, 139 transitions, 3045 flow [2020-10-16 03:24:26,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 03:24:26,895 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:26,895 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:27,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 03:24:27,110 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:27,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:27,111 INFO L82 PathProgramCache]: Analyzing trace with hash 202792686, now seen corresponding path program 33 times [2020-10-16 03:24:27,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:27,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218488711] [2020-10-16 03:24:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 03:24:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:27,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218488711] [2020-10-16 03:24:27,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134330448] [2020-10-16 03:24:27,205 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:27,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 03:24:27,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 03:24:27,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 03:24:27,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 03:24:27,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 03:24:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 03:24:27,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 03:24:27,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 03:24:27,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000502269] [2020-10-16 03:24:27,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 03:24:27,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 03:24:27,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 03:24:27,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 03:24:27,286 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 03:24:27,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 139 transitions, 3045 flow. Second operand 14 states. [2020-10-16 03:24:27,287 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 03:24:27,287 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 03:24:27,287 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 03:24:27,803 INFO L129 PetriNetUnfolder]: 125/318 cut-off events. [2020-10-16 03:24:27,803 INFO L130 PetriNetUnfolder]: For 23413/23415 co-relation queries the response was YES. [2020-10-16 03:24:27,807 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4344 conditions, 318 events. 125/318 cut-off events. For 23413/23415 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1446 event pairs, 0 based on Foata normal form. 4/322 useless extension candidates. Maximal degree in co-relation 4250. Up to 183 conditions per place. [2020-10-16 03:24:27,813 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 48 selfloop transitions, 104 changer transitions 0/159 dead transitions. [2020-10-16 03:24:27,813 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 159 transitions, 4375 flow [2020-10-16 03:24:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 03:24:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 03:24:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1554 transitions. [2020-10-16 03:24:27,816 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6756521739130434 [2020-10-16 03:24:27,816 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1554 transitions. [2020-10-16 03:24:27,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1554 transitions. [2020-10-16 03:24:27,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 03:24:27,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1554 transitions. [2020-10-16 03:24:27,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 03:24:27,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 03:24:27,822 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 03:24:27,823 INFO L185 Difference]: Start difference. First operand has 208 places, 139 transitions, 3045 flow. Second operand 23 states and 1554 transitions. [2020-10-16 03:24:27,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 159 transitions, 4375 flow [2020-10-16 03:24:27,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 159 transitions, 3990 flow, removed 109 selfloop flow, removed 19 redundant places. [2020-10-16 03:24:27,986 INFO L241 Difference]: Finished difference. Result has 213 places, 140 transitions, 2963 flow [2020-10-16 03:24:27,987 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2660, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2963, PETRI_PLACES=213, PETRI_TRANSITIONS=140} [2020-10-16 03:24:27,987 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 195 predicate places. [2020-10-16 03:24:27,987 INFO L481 AbstractCegarLoop]: Abstraction has has 213 places, 140 transitions, 2963 flow [2020-10-16 03:24:27,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 03:24:27,988 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 03:24:27,988 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 03:24:28,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 03:24:28,202 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 03:24:28,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 03:24:28,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1562805087, now seen corresponding path program 34 times [2020-10-16 03:24:28,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 03:24:28,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917887593] [2020-10-16 03:24:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 03:24:28,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 03:24:28,216 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 03:24:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 03:24:28,232 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 03:24:28,262 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 03:24:28,262 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 03:24:28,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-16 03:24:28,329 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:24:28 BasicIcfg [2020-10-16 03:24:28,329 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 03:24:28,332 INFO L168 Benchmark]: Toolchain (without parser) took 25881.66 ms. Allocated memory was 253.2 MB in the beginning and 565.2 MB in the end (delta: 312.0 MB). Free memory was 205.8 MB in the beginning and 343.0 MB in the end (delta: -137.3 MB). Peak memory consumption was 174.7 MB. Max. memory is 14.2 GB. [2020-10-16 03:24:28,334 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 253.2 MB. Free memory is still 227.1 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 03:24:28,335 INFO L168 Benchmark]: CACSL2BoogieTranslator took 837.27 ms. Allocated memory was 253.2 MB in the beginning and 319.8 MB in the end (delta: 66.6 MB). Free memory was 205.8 MB in the beginning and 275.2 MB in the end (delta: -69.5 MB). Peak memory consumption was 30.3 MB. Max. memory is 14.2 GB. [2020-10-16 03:24:28,335 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.30 ms. Allocated memory is still 319.8 MB. Free memory is still 275.2 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 03:24:28,335 INFO L168 Benchmark]: Boogie Preprocessor took 29.24 ms. Allocated memory is still 319.8 MB. Free memory was 275.2 MB in the beginning and 272.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 03:24:28,336 INFO L168 Benchmark]: RCFGBuilder took 380.35 ms. Allocated memory is still 319.8 MB. Free memory was 272.7 MB in the beginning and 250.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 14.2 GB. [2020-10-16 03:24:28,336 INFO L168 Benchmark]: TraceAbstraction took 24579.44 ms. Allocated memory was 319.8 MB in the beginning and 565.2 MB in the end (delta: 245.4 MB). Free memory was 250.7 MB in the beginning and 343.0 MB in the end (delta: -92.3 MB). Peak memory consumption was 153.1 MB. Max. memory is 14.2 GB. [2020-10-16 03:24:28,339 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 253.2 MB. Free memory is still 227.1 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 837.27 ms. Allocated memory was 253.2 MB in the beginning and 319.8 MB in the end (delta: 66.6 MB). Free memory was 205.8 MB in the beginning and 275.2 MB in the end (delta: -69.5 MB). Peak memory consumption was 30.3 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 48.30 ms. Allocated memory is still 319.8 MB. Free memory is still 275.2 MB. There was no memory consumed. Max. memory is 14.2 GB. * Boogie Preprocessor took 29.24 ms. Allocated memory is still 319.8 MB. Free memory was 275.2 MB in the beginning and 272.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 380.35 ms. Allocated memory is still 319.8 MB. Free memory was 272.7 MB in the beginning and 250.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 22.0 MB. Max. memory is 14.2 GB. * TraceAbstraction took 24579.44 ms. Allocated memory was 319.8 MB in the beginning and 565.2 MB in the end (delta: 245.4 MB). Free memory was 250.7 MB in the beginning and 343.0 MB in the end (delta: -92.3 MB). Peak memory consumption was 153.1 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 55 PlacesBefore, 18 PlacesAfterwards, 53 TransitionsBefore, 13 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 881 MoverChecksTotal - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L697] 0 int condI = i >= (2*5 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 5 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L685] COND TRUE 2 k < 5 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L700] 0 int condJ = j >= (2*5 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - 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: UNSAFE, OverallTime: 24.3s, OverallIterations: 36, TraceHistogramMax: 5, AutomataDifference: 10.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 78 SDtfs, 447 SDslu, 70 SDs, 0 SdLazy, 1923 SolverSat, 924 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1001 GetRequests, 349 SyntacticMatches, 30 SemanticMatches, 622 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2721 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3045occurred in iteration=34, 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: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 916 NumberOfCodeBlocks, 916 NumberOfCodeBlocksAsserted, 111 NumberOfCheckSat, 833 ConstructedInterpolants, 0 QuantifiedInterpolants, 46621 SizeOfPredicates, 187 NumberOfNonLiveVariables, 2855 ConjunctsInSsa, 312 ConjunctsInUnsatCore, 65 InterpolantComputations, 5 PerfectInterpolantSequences, 0/460 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...