/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe015_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 20:24:06,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 20:24:06,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 20:24:06,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 20:24:06,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 20:24:06,770 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 20:24:06,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 20:24:06,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 20:24:06,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 20:24:06,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 20:24:06,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 20:24:06,781 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 20:24:06,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 20:24:06,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 20:24:06,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 20:24:06,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 20:24:06,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 20:24:06,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 20:24:06,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 20:24:06,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 20:24:06,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 20:24:06,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 20:24:06,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 20:24:06,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 20:24:06,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 20:24:06,806 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 20:24:06,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 20:24:06,806 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 20:24:06,809 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.epf [2021-03-11 20:24:06,831 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 20:24:06,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 20:24:06,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 20:24:06,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 20:24:06,832 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 20:24:06,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 20:24:06,832 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 20:24:06,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 20:24:06,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 20:24:06,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 20:24:06,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 20:24:06,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 20:24:06,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 20:24:06,832 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 20:24:06,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 20:24:06,833 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 20:24:06,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 20:24:06,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 20:24:06,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 20:24:06,833 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 20:24:06,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 20:24:06,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 20:24:06,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 20:24:06,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 20:24:06,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 20:24:06,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 20:24:06,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 20:24:06,834 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 20:24:06,834 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 20:24:07,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 20:24:07,067 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 20:24:07,068 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 20:24:07,069 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-11 20:24:07,071 INFO L275 PluginConnector]: CDTParser initialized [2021-03-11 20:24:07,072 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_tso.opt.i [2021-03-11 20:24:07,123 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e570a6182/9c1e8af166244eccaf49be34ef3bd059/FLAGaaf8b71b6 [2021-03-11 20:24:07,486 INFO L306 CDTParser]: Found 1 translation units. [2021-03-11 20:24:07,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_tso.opt.i [2021-03-11 20:24:07,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e570a6182/9c1e8af166244eccaf49be34ef3bd059/FLAGaaf8b71b6 [2021-03-11 20:24:07,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e570a6182/9c1e8af166244eccaf49be34ef3bd059 [2021-03-11 20:24:07,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 20:24:07,874 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-11 20:24:07,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-11 20:24:07,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-11 20:24:07,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-11 20:24:07,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:24:07" (1/1) ... [2021-03-11 20:24:07,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35f04e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:07, skipping insertion in model container [2021-03-11 20:24:07,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:24:07" (1/1) ... [2021-03-11 20:24:07,901 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-11 20:24:07,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-11 20:24:08,021 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_tso.opt.i[949,962] [2021-03-11 20:24:08,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:24:08,104 INFO L203 MainTranslator]: Completed pre-run [2021-03-11 20:24:08,120 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_tso.opt.i[949,962] [2021-03-11 20:24:08,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:24:08,210 INFO L208 MainTranslator]: Completed translation [2021-03-11 20:24:08,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:08 WrapperNode [2021-03-11 20:24:08,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-11 20:24:08,212 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 20:24:08,212 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 20:24:08,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 20:24:08,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:08" (1/1) ... [2021-03-11 20:24:08,239 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:08" (1/1) ... [2021-03-11 20:24:08,254 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 20:24:08,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 20:24:08,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 20:24:08,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 20:24:08,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:08" (1/1) ... [2021-03-11 20:24:08,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:08" (1/1) ... [2021-03-11 20:24:08,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:08" (1/1) ... [2021-03-11 20:24:08,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:08" (1/1) ... [2021-03-11 20:24:08,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:08" (1/1) ... [2021-03-11 20:24:08,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:08" (1/1) ... [2021-03-11 20:24:08,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:08" (1/1) ... [2021-03-11 20:24:08,278 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 20:24:08,279 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 20:24:08,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 20:24:08,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 20:24:08,281 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:08" (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 [2021-03-11 20:24:08,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-11 20:24:08,338 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-11 20:24:08,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-11 20:24:08,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-11 20:24:08,339 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-11 20:24:08,339 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-11 20:24:08,339 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-11 20:24:08,339 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-11 20:24:08,340 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-03-11 20:24:08,340 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-03-11 20:24:08,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-11 20:24:08,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-11 20:24:08,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 20:24:08,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 20:24:08,341 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 20:24:08,655 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 20:24:08,655 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-11 20:24:08,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:24:08 BoogieIcfgContainer [2021-03-11 20:24:08,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 20:24:08,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 20:24:08,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 20:24:08,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 20:24:08,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.03 08:24:07" (1/3) ... [2021-03-11 20:24:08,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc38d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:24:08, skipping insertion in model container [2021-03-11 20:24:08,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:24:08" (2/3) ... [2021-03-11 20:24:08,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc38d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:24:08, skipping insertion in model container [2021-03-11 20:24:08,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:24:08" (3/3) ... [2021-03-11 20:24:08,661 INFO L111 eAbstractionObserver]: Analyzing ICFG safe015_tso.opt.i [2021-03-11 20:24:08,664 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 20:24:08,667 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 20:24:08,668 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 20:24:08,691 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,691 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,691 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,692 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,692 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,692 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,692 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,692 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,692 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,692 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,692 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,693 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,693 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,693 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,693 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,693 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,693 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,694 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,694 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,694 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,694 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,694 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,694 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,694 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,695 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,695 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,696 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,696 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,696 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,696 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,696 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,697 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,697 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,697 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,697 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,697 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,699 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,699 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,699 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,699 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,704 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,704 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,704 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,705 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,708 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,708 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,708 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,708 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:24:08,710 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 20:24:08,722 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 20:24:08,734 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 20:24:08,734 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 20:24:08,734 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 20:24:08,734 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 20:24:08,734 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 20:24:08,734 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 20:24:08,734 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 20:24:08,735 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 20:24:08,742 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 74 transitions, 163 flow [2021-03-11 20:24:08,780 INFO L129 PetriNetUnfolder]: 2/71 cut-off events. [2021-03-11 20:24:08,780 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:24:08,785 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 71 events. 2/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 56. Up to 2 conditions per place. [2021-03-11 20:24:08,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 74 transitions, 163 flow [2021-03-11 20:24:08,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 59 transitions, 127 flow [2021-03-11 20:24:08,792 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 20:24:08,798 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 59 transitions, 127 flow [2021-03-11 20:24:08,799 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 59 transitions, 127 flow [2021-03-11 20:24:08,800 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 59 transitions, 127 flow [2021-03-11 20:24:08,809 INFO L129 PetriNetUnfolder]: 1/59 cut-off events. [2021-03-11 20:24:08,809 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:24:08,809 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 59 events. 1/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 50 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2021-03-11 20:24:08,810 INFO L116 LiptonReduction]: Number of co-enabled transitions 864 [2021-03-11 20:24:10,362 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-03-11 20:24:10,547 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-03-11 20:24:10,598 INFO L131 LiptonReduction]: Checked pairs total: 1773 [2021-03-11 20:24:10,599 INFO L133 LiptonReduction]: Total number of compositions: 46 [2021-03-11 20:24:10,600 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1810 [2021-03-11 20:24:10,605 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-11 20:24:10,605 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:24:10,605 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:24:10,606 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:24:10,606 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:24:10,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:24:10,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1348249452, now seen corresponding path program 1 times [2021-03-11 20:24:10,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:24:10,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135440604] [2021-03-11 20:24:10,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:24:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:24:10,736 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:10,737 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:24:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:24:10,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135440604] [2021-03-11 20:24:10,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:24:10,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:24:10,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489870710] [2021-03-11 20:24:10,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-03-11 20:24:10,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:24:10,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-03-11 20:24:10,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-03-11 20:24:10,756 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 120 [2021-03-11 20:24:10,758 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 45 flow. Second operand has 2 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,760 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:24:10,761 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 120 [2021-03-11 20:24:10,762 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:24:10,770 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-11 20:24:10,774 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:24:10,774 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 1/18 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-11 20:24:10,775 INFO L132 encePairwiseOnDemand]: 119/120 looper letters, 0 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2021-03-11 20:24:10,775 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 17 transitions, 43 flow [2021-03-11 20:24:10,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-11 20:24:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-03-11 20:24:10,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 225 transitions. [2021-03-11 20:24:10,783 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9375 [2021-03-11 20:24:10,784 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 225 transitions. [2021-03-11 20:24:10,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 225 transitions. [2021-03-11 20:24:10,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:24:10,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 225 transitions. [2021-03-11 20:24:10,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,795 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,796 INFO L185 Difference]: Start difference. First operand has 27 places, 18 transitions, 45 flow. Second operand 2 states and 225 transitions. [2021-03-11 20:24:10,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 17 transitions, 43 flow [2021-03-11 20:24:10,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 17 transitions, 40 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-11 20:24:10,799 INFO L241 Difference]: Finished difference. Result has 25 places, 17 transitions, 40 flow [2021-03-11 20:24:10,801 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=40, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2021-03-11 20:24:10,801 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, -2 predicate places. [2021-03-11 20:24:10,801 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 40 flow [2021-03-11 20:24:10,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 112.5) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,801 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:24:10,802 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:24:10,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 20:24:10,802 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:24:10,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:24:10,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1153939640, now seen corresponding path program 1 times [2021-03-11 20:24:10,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:24:10,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439731272] [2021-03-11 20:24:10,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:24:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:24:10,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:10,875 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:24:10,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439731272] [2021-03-11 20:24:10,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:24:10,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:24:10,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820557100] [2021-03-11 20:24:10,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:24:10,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:24:10,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:24:10,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:24:10,883 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 120 [2021-03-11 20:24:10,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:24:10,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 120 [2021-03-11 20:24:10,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:24:10,917 INFO L129 PetriNetUnfolder]: 21/70 cut-off events. [2021-03-11 20:24:10,917 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:24:10,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 70 events. 21/70 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 241 event pairs, 11 based on Foata normal form. 3/68 useless extension candidates. Maximal degree in co-relation 117. Up to 37 conditions per place. [2021-03-11 20:24:10,920 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 6 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2021-03-11 20:24:10,920 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 19 transitions, 60 flow [2021-03-11 20:24:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:24:10,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:24:10,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2021-03-11 20:24:10,924 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.825 [2021-03-11 20:24:10,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2021-03-11 20:24:10,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2021-03-11 20:24:10,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:24:10,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2021-03-11 20:24:10,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,928 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,928 INFO L185 Difference]: Start difference. First operand has 25 places, 17 transitions, 40 flow. Second operand 3 states and 297 transitions. [2021-03-11 20:24:10,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 19 transitions, 60 flow [2021-03-11 20:24:10,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 19 transitions, 60 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 20:24:10,929 INFO L241 Difference]: Finished difference. Result has 28 places, 17 transitions, 48 flow [2021-03-11 20:24:10,929 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=28, PETRI_TRANSITIONS=17} [2021-03-11 20:24:10,930 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2021-03-11 20:24:10,930 INFO L480 AbstractCegarLoop]: Abstraction has has 28 places, 17 transitions, 48 flow [2021-03-11 20:24:10,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,930 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:24:10,930 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:24:10,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 20:24:10,930 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:24:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:24:10,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1397616804, now seen corresponding path program 1 times [2021-03-11 20:24:10,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:24:10,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684770138] [2021-03-11 20:24:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:24:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:24:10,970 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:10,971 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:24:10,971 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:10,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:24:10,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684770138] [2021-03-11 20:24:10,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:24:10,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:24:10,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771877662] [2021-03-11 20:24:10,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:24:10,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:24:10,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:24:10,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:24:10,976 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 120 [2021-03-11 20:24:10,976 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,976 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:24:10,976 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 120 [2021-03-11 20:24:10,976 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:24:10,990 INFO L129 PetriNetUnfolder]: 13/49 cut-off events. [2021-03-11 20:24:10,990 INFO L130 PetriNetUnfolder]: For 12/19 co-relation queries the response was YES. [2021-03-11 20:24:10,990 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 49 events. 13/49 cut-off events. For 12/19 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 142 event pairs, 5 based on Foata normal form. 3/49 useless extension candidates. Maximal degree in co-relation 97. Up to 22 conditions per place. [2021-03-11 20:24:10,991 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 6 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2021-03-11 20:24:10,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 19 transitions, 68 flow [2021-03-11 20:24:10,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:24:10,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:24:10,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2021-03-11 20:24:10,992 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.825 [2021-03-11 20:24:10,992 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2021-03-11 20:24:10,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2021-03-11 20:24:10,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:24:10,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2021-03-11 20:24:10,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,994 INFO L185 Difference]: Start difference. First operand has 28 places, 17 transitions, 48 flow. Second operand 3 states and 297 transitions. [2021-03-11 20:24:10,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 19 transitions, 68 flow [2021-03-11 20:24:10,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 64 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:24:10,995 INFO L241 Difference]: Finished difference. Result has 29 places, 17 transitions, 52 flow [2021-03-11 20:24:10,995 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=29, PETRI_TRANSITIONS=17} [2021-03-11 20:24:10,995 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2021-03-11 20:24:10,995 INFO L480 AbstractCegarLoop]: Abstraction has has 29 places, 17 transitions, 52 flow [2021-03-11 20:24:10,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:10,995 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:24:10,995 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:24:10,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 20:24:10,996 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:24:10,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:24:10,996 INFO L82 PathProgramCache]: Analyzing trace with hash 376446416, now seen corresponding path program 1 times [2021-03-11 20:24:10,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:24:10,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731447997] [2021-03-11 20:24:10,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:24:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:24:11,018 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:24:11,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731447997] [2021-03-11 20:24:11,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:24:11,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:24:11,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851518453] [2021-03-11 20:24:11,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:24:11,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:24:11,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:24:11,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:24:11,023 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 120 [2021-03-11 20:24:11,023 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 17 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,023 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:24:11,023 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 120 [2021-03-11 20:24:11,023 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:24:11,030 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2021-03-11 20:24:11,030 INFO L130 PetriNetUnfolder]: For 8/10 co-relation queries the response was YES. [2021-03-11 20:24:11,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 17 events. 0/17 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 15 event pairs, 0 based on Foata normal form. 1/18 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-11 20:24:11,030 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 1 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2021-03-11 20:24:11,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 17 transitions, 58 flow [2021-03-11 20:24:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:24:11,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:24:11,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2021-03-11 20:24:11,033 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2021-03-11 20:24:11,033 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 304 transitions. [2021-03-11 20:24:11,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 304 transitions. [2021-03-11 20:24:11,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:24:11,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 304 transitions. [2021-03-11 20:24:11,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,035 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,035 INFO L185 Difference]: Start difference. First operand has 29 places, 17 transitions, 52 flow. Second operand 3 states and 304 transitions. [2021-03-11 20:24:11,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 17 transitions, 58 flow [2021-03-11 20:24:11,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 17 transitions, 54 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:24:11,036 INFO L241 Difference]: Finished difference. Result has 30 places, 17 transitions, 56 flow [2021-03-11 20:24:11,036 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=30, PETRI_TRANSITIONS=17} [2021-03-11 20:24:11,036 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2021-03-11 20:24:11,036 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 17 transitions, 56 flow [2021-03-11 20:24:11,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,036 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:24:11,036 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:24:11,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 20:24:11,037 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:24:11,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:24:11,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1763093591, now seen corresponding path program 1 times [2021-03-11 20:24:11,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:24:11,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676131219] [2021-03-11 20:24:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:24:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:24:11,075 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,075 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:11,082 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:24:11,083 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:24:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:24:11,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676131219] [2021-03-11 20:24:11,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:24:11,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:24:11,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196320937] [2021-03-11 20:24:11,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:24:11,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:24:11,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:24:11,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:24:11,096 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 120 [2021-03-11 20:24:11,096 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 17 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,096 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:24:11,096 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 120 [2021-03-11 20:24:11,096 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:24:11,140 INFO L129 PetriNetUnfolder]: 39/118 cut-off events. [2021-03-11 20:24:11,140 INFO L130 PetriNetUnfolder]: For 70/90 co-relation queries the response was YES. [2021-03-11 20:24:11,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 118 events. 39/118 cut-off events. For 70/90 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 473 event pairs, 7 based on Foata normal form. 8/122 useless extension candidates. Maximal degree in co-relation 271. Up to 42 conditions per place. [2021-03-11 20:24:11,141 INFO L132 encePairwiseOnDemand]: 112/120 looper letters, 10 selfloop transitions, 9 changer transitions 0/28 dead transitions. [2021-03-11 20:24:11,141 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 28 transitions, 128 flow [2021-03-11 20:24:11,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:24:11,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:24:11,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 369 transitions. [2021-03-11 20:24:11,143 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.76875 [2021-03-11 20:24:11,143 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 369 transitions. [2021-03-11 20:24:11,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 369 transitions. [2021-03-11 20:24:11,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:24:11,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 369 transitions. [2021-03-11 20:24:11,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.25) internal successors, (369), 4 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,145 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,145 INFO L185 Difference]: Start difference. First operand has 30 places, 17 transitions, 56 flow. Second operand 4 states and 369 transitions. [2021-03-11 20:24:11,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 28 transitions, 128 flow [2021-03-11 20:24:11,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:24:11,146 INFO L241 Difference]: Finished difference. Result has 34 places, 25 transitions, 124 flow [2021-03-11 20:24:11,147 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2021-03-11 20:24:11,147 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2021-03-11 20:24:11,147 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 124 flow [2021-03-11 20:24:11,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 88.25) internal successors, (353), 4 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,147 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:24:11,147 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:24:11,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 20:24:11,148 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:24:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:24:11,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1292618131, now seen corresponding path program 1 times [2021-03-11 20:24:11,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:24:11,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510910862] [2021-03-11 20:24:11,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:24:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:24:11,195 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,196 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:11,198 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,198 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:11,203 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:24:11,203 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:24:11,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:24:11,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510910862] [2021-03-11 20:24:11,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:24:11,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:24:11,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993766633] [2021-03-11 20:24:11,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:24:11,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:24:11,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:24:11,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:24:11,216 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 120 [2021-03-11 20:24:11,217 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,217 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:24:11,218 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 120 [2021-03-11 20:24:11,218 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:24:11,269 INFO L129 PetriNetUnfolder]: 47/149 cut-off events. [2021-03-11 20:24:11,269 INFO L130 PetriNetUnfolder]: For 143/189 co-relation queries the response was YES. [2021-03-11 20:24:11,270 INFO L84 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 149 events. 47/149 cut-off events. For 143/189 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 694 event pairs, 1 based on Foata normal form. 5/150 useless extension candidates. Maximal degree in co-relation 501. Up to 48 conditions per place. [2021-03-11 20:24:11,271 INFO L132 encePairwiseOnDemand]: 112/120 looper letters, 13 selfloop transitions, 10 changer transitions 12/44 dead transitions. [2021-03-11 20:24:11,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 298 flow [2021-03-11 20:24:11,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:24:11,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:24:11,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 456 transitions. [2021-03-11 20:24:11,272 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.76 [2021-03-11 20:24:11,272 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 456 transitions. [2021-03-11 20:24:11,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 456 transitions. [2021-03-11 20:24:11,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:24:11,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 456 transitions. [2021-03-11 20:24:11,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,275 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,275 INFO L185 Difference]: Start difference. First operand has 34 places, 25 transitions, 124 flow. Second operand 5 states and 456 transitions. [2021-03-11 20:24:11,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 298 flow [2021-03-11 20:24:11,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 298 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 20:24:11,278 INFO L241 Difference]: Finished difference. Result has 41 places, 27 transitions, 180 flow [2021-03-11 20:24:11,278 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=41, PETRI_TRANSITIONS=27} [2021-03-11 20:24:11,278 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 14 predicate places. [2021-03-11 20:24:11,278 INFO L480 AbstractCegarLoop]: Abstraction has has 41 places, 27 transitions, 180 flow [2021-03-11 20:24:11,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 88.2) internal successors, (441), 5 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,278 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:24:11,278 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:24:11,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 20:24:11,279 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:24:11,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:24:11,279 INFO L82 PathProgramCache]: Analyzing trace with hash -604355299, now seen corresponding path program 2 times [2021-03-11 20:24:11,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:24:11,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957997313] [2021-03-11 20:24:11,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:24:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:24:11,320 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:11,328 INFO L142 QuantifierPusher]: treesize reduction 19, result has 32.1 percent of original size [2021-03-11 20:24:11,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 20:24:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:24:11,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957997313] [2021-03-11 20:24:11,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:24:11,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:24:11,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127903987] [2021-03-11 20:24:11,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:24:11,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:24:11,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:24:11,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:24:11,338 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 120 [2021-03-11 20:24:11,338 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 27 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,338 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:24:11,338 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 120 [2021-03-11 20:24:11,338 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:24:11,378 INFO L129 PetriNetUnfolder]: 110/278 cut-off events. [2021-03-11 20:24:11,379 INFO L130 PetriNetUnfolder]: For 995/1041 co-relation queries the response was YES. [2021-03-11 20:24:11,380 INFO L84 FinitePrefix]: Finished finitePrefix Result has 821 conditions, 278 events. 110/278 cut-off events. For 995/1041 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 1593 event pairs, 33 based on Foata normal form. 33/298 useless extension candidates. Maximal degree in co-relation 809. Up to 161 conditions per place. [2021-03-11 20:24:11,381 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 8 selfloop transitions, 8 changer transitions 0/37 dead transitions. [2021-03-11 20:24:11,381 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 232 flow [2021-03-11 20:24:11,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:24:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:24:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 448 transitions. [2021-03-11 20:24:11,382 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7466666666666667 [2021-03-11 20:24:11,382 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 448 transitions. [2021-03-11 20:24:11,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 448 transitions. [2021-03-11 20:24:11,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:24:11,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 448 transitions. [2021-03-11 20:24:11,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.6) internal successors, (448), 5 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,384 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,384 INFO L185 Difference]: Start difference. First operand has 41 places, 27 transitions, 180 flow. Second operand 5 states and 448 transitions. [2021-03-11 20:24:11,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 232 flow [2021-03-11 20:24:11,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 218 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-03-11 20:24:11,388 INFO L241 Difference]: Finished difference. Result has 45 places, 34 transitions, 226 flow [2021-03-11 20:24:11,388 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2021-03-11 20:24:11,389 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 18 predicate places. [2021-03-11 20:24:11,389 INFO L480 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 226 flow [2021-03-11 20:24:11,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 86.75) internal successors, (347), 4 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,389 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:24:11,389 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:24:11,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 20:24:11,389 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:24:11,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:24:11,389 INFO L82 PathProgramCache]: Analyzing trace with hash 715170275, now seen corresponding path program 1 times [2021-03-11 20:24:11,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:24:11,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223003206] [2021-03-11 20:24:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:24:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:24:11,415 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,415 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:24:11,416 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,416 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:11,418 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,418 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:24:11,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223003206] [2021-03-11 20:24:11,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:24:11,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:24:11,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321665848] [2021-03-11 20:24:11,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:24:11,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:24:11,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:24:11,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:24:11,422 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 120 [2021-03-11 20:24:11,423 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:24:11,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 120 [2021-03-11 20:24:11,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:24:11,462 INFO L129 PetriNetUnfolder]: 128/321 cut-off events. [2021-03-11 20:24:11,462 INFO L130 PetriNetUnfolder]: For 949/1086 co-relation queries the response was YES. [2021-03-11 20:24:11,464 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1100 conditions, 321 events. 128/321 cut-off events. For 949/1086 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2018 event pairs, 33 based on Foata normal form. 38/334 useless extension candidates. Maximal degree in co-relation 1086. Up to 216 conditions per place. [2021-03-11 20:24:11,465 INFO L132 encePairwiseOnDemand]: 116/120 looper letters, 9 selfloop transitions, 4 changer transitions 9/43 dead transitions. [2021-03-11 20:24:11,465 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 43 transitions, 331 flow [2021-03-11 20:24:11,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:24:11,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:24:11,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 477 transitions. [2021-03-11 20:24:11,466 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.795 [2021-03-11 20:24:11,466 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 477 transitions. [2021-03-11 20:24:11,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 477 transitions. [2021-03-11 20:24:11,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:24:11,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 477 transitions. [2021-03-11 20:24:11,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 95.4) internal successors, (477), 5 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,469 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,470 INFO L185 Difference]: Start difference. First operand has 45 places, 34 transitions, 226 flow. Second operand 5 states and 477 transitions. [2021-03-11 20:24:11,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 43 transitions, 331 flow [2021-03-11 20:24:11,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 327 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:24:11,472 INFO L241 Difference]: Finished difference. Result has 50 places, 32 transitions, 225 flow [2021-03-11 20:24:11,472 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=225, PETRI_PLACES=50, PETRI_TRANSITIONS=32} [2021-03-11 20:24:11,472 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 23 predicate places. [2021-03-11 20:24:11,472 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 32 transitions, 225 flow [2021-03-11 20:24:11,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,473 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:24:11,473 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:24:11,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 20:24:11,473 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:24:11,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:24:11,473 INFO L82 PathProgramCache]: Analyzing trace with hash -667290777, now seen corresponding path program 2 times [2021-03-11 20:24:11,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:24:11,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585929531] [2021-03-11 20:24:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:24:11,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:24:11,509 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,510 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:11,512 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:24:11,512 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:24:11,516 INFO L142 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-03-11 20:24:11,516 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 20:24:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:24:11,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585929531] [2021-03-11 20:24:11,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:24:11,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:24:11,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548511296] [2021-03-11 20:24:11,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:24:11,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:24:11,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:24:11,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:24:11,523 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 120 [2021-03-11 20:24:11,523 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 32 transitions, 225 flow. Second operand has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,523 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:24:11,523 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 120 [2021-03-11 20:24:11,523 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:24:11,568 INFO L129 PetriNetUnfolder]: 40/132 cut-off events. [2021-03-11 20:24:11,568 INFO L130 PetriNetUnfolder]: For 533/733 co-relation queries the response was YES. [2021-03-11 20:24:11,568 INFO L84 FinitePrefix]: Finished finitePrefix Result has 534 conditions, 132 events. 40/132 cut-off events. For 533/733 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 657 event pairs, 2 based on Foata normal form. 67/191 useless extension candidates. Maximal degree in co-relation 518. Up to 86 conditions per place. [2021-03-11 20:24:11,570 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 4 selfloop transitions, 15 changer transitions 4/42 dead transitions. [2021-03-11 20:24:11,570 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 42 transitions, 329 flow [2021-03-11 20:24:11,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 20:24:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-11 20:24:11,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 627 transitions. [2021-03-11 20:24:11,571 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7464285714285714 [2021-03-11 20:24:11,571 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 627 transitions. [2021-03-11 20:24:11,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 627 transitions. [2021-03-11 20:24:11,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:24:11,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 627 transitions. [2021-03-11 20:24:11,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 89.57142857142857) internal successors, (627), 7 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,574 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,574 INFO L185 Difference]: Start difference. First operand has 50 places, 32 transitions, 225 flow. Second operand 7 states and 627 transitions. [2021-03-11 20:24:11,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 42 transitions, 329 flow [2021-03-11 20:24:11,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 307 flow, removed 3 selfloop flow, removed 5 redundant places. [2021-03-11 20:24:11,576 INFO L241 Difference]: Finished difference. Result has 52 places, 38 transitions, 294 flow [2021-03-11 20:24:11,576 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=294, PETRI_PLACES=52, PETRI_TRANSITIONS=38} [2021-03-11 20:24:11,576 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 25 predicate places. [2021-03-11 20:24:11,576 INFO L480 AbstractCegarLoop]: Abstraction has has 52 places, 38 transitions, 294 flow [2021-03-11 20:24:11,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 86.8) internal successors, (434), 5 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,576 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:24:11,577 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:24:11,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 20:24:11,577 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:24:11,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:24:11,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1437989459, now seen corresponding path program 1 times [2021-03-11 20:24:11,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:24:11,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76039028] [2021-03-11 20:24:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:24:11,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:24:11,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,607 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:24:11,607 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,608 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:11,610 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,610 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:11,613 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:24:11,613 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:24:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:24:11,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76039028] [2021-03-11 20:24:11,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:24:11,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 20:24:11,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074316180] [2021-03-11 20:24:11,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:24:11,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:24:11,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:24:11,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:24:11,621 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 120 [2021-03-11 20:24:11,621 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 38 transitions, 294 flow. Second operand has 5 states, 5 states have (on average 88.4) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,621 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:24:11,621 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 120 [2021-03-11 20:24:11,621 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:24:11,673 INFO L129 PetriNetUnfolder]: 41/147 cut-off events. [2021-03-11 20:24:11,673 INFO L130 PetriNetUnfolder]: For 610/802 co-relation queries the response was YES. [2021-03-11 20:24:11,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 147 events. 41/147 cut-off events. For 610/802 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 781 event pairs, 3 based on Foata normal form. 14/149 useless extension candidates. Maximal degree in co-relation 653. Up to 99 conditions per place. [2021-03-11 20:24:11,674 INFO L132 encePairwiseOnDemand]: 113/120 looper letters, 4 selfloop transitions, 10 changer transitions 12/43 dead transitions. [2021-03-11 20:24:11,674 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 43 transitions, 368 flow [2021-03-11 20:24:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 20:24:11,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 20:24:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 540 transitions. [2021-03-11 20:24:11,676 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-03-11 20:24:11,676 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 540 transitions. [2021-03-11 20:24:11,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 540 transitions. [2021-03-11 20:24:11,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:24:11,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 540 transitions. [2021-03-11 20:24:11,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.0) internal successors, (540), 6 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,678 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,678 INFO L185 Difference]: Start difference. First operand has 52 places, 38 transitions, 294 flow. Second operand 6 states and 540 transitions. [2021-03-11 20:24:11,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 43 transitions, 368 flow [2021-03-11 20:24:11,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 43 transitions, 333 flow, removed 13 selfloop flow, removed 2 redundant places. [2021-03-11 20:24:11,681 INFO L241 Difference]: Finished difference. Result has 57 places, 31 transitions, 237 flow [2021-03-11 20:24:11,681 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=237, PETRI_PLACES=57, PETRI_TRANSITIONS=31} [2021-03-11 20:24:11,681 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 30 predicate places. [2021-03-11 20:24:11,681 INFO L480 AbstractCegarLoop]: Abstraction has has 57 places, 31 transitions, 237 flow [2021-03-11 20:24:11,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 88.4) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,681 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:24:11,681 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:24:11,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 20:24:11,682 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:24:11,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:24:11,682 INFO L82 PathProgramCache]: Analyzing trace with hash 47383001, now seen corresponding path program 2 times [2021-03-11 20:24:11,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:24:11,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003466253] [2021-03-11 20:24:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:24:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:24:11,711 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,712 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:24:11,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,713 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:11,715 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,715 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:11,719 INFO L142 QuantifierPusher]: treesize reduction 3, result has 85.0 percent of original size [2021-03-11 20:24:11,719 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:24:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:24:11,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003466253] [2021-03-11 20:24:11,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:24:11,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 20:24:11,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060697746] [2021-03-11 20:24:11,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:24:11,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:24:11,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:24:11,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:24:11,727 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 120 [2021-03-11 20:24:11,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 31 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 88.4) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:24:11,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 120 [2021-03-11 20:24:11,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:24:11,752 INFO L129 PetriNetUnfolder]: 21/112 cut-off events. [2021-03-11 20:24:11,752 INFO L130 PetriNetUnfolder]: For 395/452 co-relation queries the response was YES. [2021-03-11 20:24:11,752 INFO L84 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 112 events. 21/112 cut-off events. For 395/452 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 558 event pairs, 3 based on Foata normal form. 13/120 useless extension candidates. Maximal degree in co-relation 443. Up to 49 conditions per place. [2021-03-11 20:24:11,752 INFO L132 encePairwiseOnDemand]: 113/120 looper letters, 2 selfloop transitions, 10 changer transitions 10/36 dead transitions. [2021-03-11 20:24:11,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 36 transitions, 324 flow [2021-03-11 20:24:11,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 20:24:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 20:24:11,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 537 transitions. [2021-03-11 20:24:11,754 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7458333333333333 [2021-03-11 20:24:11,754 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 537 transitions. [2021-03-11 20:24:11,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 537 transitions. [2021-03-11 20:24:11,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:24:11,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 537 transitions. [2021-03-11 20:24:11,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,757 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,757 INFO L185 Difference]: Start difference. First operand has 57 places, 31 transitions, 237 flow. Second operand 6 states and 537 transitions. [2021-03-11 20:24:11,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 36 transitions, 324 flow [2021-03-11 20:24:11,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 36 transitions, 311 flow, removed 3 selfloop flow, removed 4 redundant places. [2021-03-11 20:24:11,760 INFO L241 Difference]: Finished difference. Result has 58 places, 26 transitions, 212 flow [2021-03-11 20:24:11,760 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=212, PETRI_PLACES=58, PETRI_TRANSITIONS=26} [2021-03-11 20:24:11,760 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 31 predicate places. [2021-03-11 20:24:11,761 INFO L480 AbstractCegarLoop]: Abstraction has has 58 places, 26 transitions, 212 flow [2021-03-11 20:24:11,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 88.4) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,761 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:24:11,761 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:24:11,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-11 20:24:11,761 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:24:11,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:24:11,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1202614761, now seen corresponding path program 3 times [2021-03-11 20:24:11,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:24:11,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322971990] [2021-03-11 20:24:11,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:24:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:24:11,790 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,790 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:11,792 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:24:11,793 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:24:11,796 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:24:11,797 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:24:11,804 INFO L142 QuantifierPusher]: treesize reduction 11, result has 54.2 percent of original size [2021-03-11 20:24:11,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 20:24:11,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:24:11,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322971990] [2021-03-11 20:24:11,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:24:11,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 20:24:11,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205266347] [2021-03-11 20:24:11,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 20:24:11,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:24:11,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 20:24:11,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 20:24:11,813 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 120 [2021-03-11 20:24:11,813 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 26 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,813 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:24:11,813 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 120 [2021-03-11 20:24:11,813 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:24:11,839 INFO L129 PetriNetUnfolder]: 10/52 cut-off events. [2021-03-11 20:24:11,839 INFO L130 PetriNetUnfolder]: For 141/183 co-relation queries the response was YES. [2021-03-11 20:24:11,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 52 events. 10/52 cut-off events. For 141/183 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 147 event pairs, 0 based on Foata normal form. 20/69 useless extension candidates. Maximal degree in co-relation 228. Up to 23 conditions per place. [2021-03-11 20:24:11,840 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2021-03-11 20:24:11,840 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 28 transitions, 246 flow [2021-03-11 20:24:11,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 20:24:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-11 20:24:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 616 transitions. [2021-03-11 20:24:11,841 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7333333333333333 [2021-03-11 20:24:11,841 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 616 transitions. [2021-03-11 20:24:11,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 616 transitions. [2021-03-11 20:24:11,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:24:11,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 616 transitions. [2021-03-11 20:24:11,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 88.0) internal successors, (616), 7 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,843 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 120.0) internal successors, (960), 8 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,843 INFO L185 Difference]: Start difference. First operand has 58 places, 26 transitions, 212 flow. Second operand 7 states and 616 transitions. [2021-03-11 20:24:11,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 28 transitions, 246 flow [2021-03-11 20:24:11,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 28 transitions, 209 flow, removed 5 selfloop flow, removed 7 redundant places. [2021-03-11 20:24:11,845 INFO L241 Difference]: Finished difference. Result has 51 places, 0 transitions, 0 flow [2021-03-11 20:24:11,845 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=51, PETRI_TRANSITIONS=0} [2021-03-11 20:24:11,845 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 24 predicate places. [2021-03-11 20:24:11,845 INFO L480 AbstractCegarLoop]: Abstraction has has 51 places, 0 transitions, 0 flow [2021-03-11 20:24:11,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 86.83333333333333) internal successors, (521), 6 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:24:11,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-11 20:24:11,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 08:24:11 BasicIcfg [2021-03-11 20:24:11,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 20:24:11,849 INFO L168 Benchmark]: Toolchain (without parser) took 3978.19 ms. Allocated memory was 377.5 MB in the beginning and 455.1 MB in the end (delta: 77.6 MB). Free memory was 341.0 MB in the beginning and 195.4 MB in the end (delta: 145.7 MB). Peak memory consumption was 224.7 MB. Max. memory is 16.0 GB. [2021-03-11 20:24:11,850 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 377.5 MB. Free memory was 358.9 MB in the beginning and 358.8 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 20:24:11,851 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.02 ms. Allocated memory is still 377.5 MB. Free memory was 340.4 MB in the beginning and 341.3 MB in the end (delta: -883.4 kB). Peak memory consumption was 9.7 MB. Max. memory is 16.0 GB. [2021-03-11 20:24:11,851 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.61 ms. Allocated memory is still 377.5 MB. Free memory was 341.3 MB in the beginning and 339.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:24:11,852 INFO L168 Benchmark]: Boogie Preprocessor took 23.66 ms. Allocated memory is still 377.5 MB. Free memory was 339.3 MB in the beginning and 338.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 20:24:11,853 INFO L168 Benchmark]: RCFGBuilder took 377.36 ms. Allocated memory is still 377.5 MB. Free memory was 338.2 MB in the beginning and 314.3 MB in the end (delta: 23.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. [2021-03-11 20:24:11,853 INFO L168 Benchmark]: TraceAbstraction took 3191.12 ms. Allocated memory was 377.5 MB in the beginning and 455.1 MB in the end (delta: 77.6 MB). Free memory was 313.3 MB in the beginning and 195.4 MB in the end (delta: 117.9 MB). Peak memory consumption was 197.4 MB. Max. memory is 16.0 GB. [2021-03-11 20:24:11,854 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 377.5 MB. Free memory was 358.9 MB in the beginning and 358.8 MB in the end (delta: 75.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 318.02 ms. Allocated memory is still 377.5 MB. Free memory was 340.4 MB in the beginning and 341.3 MB in the end (delta: -883.4 kB). Peak memory consumption was 9.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 42.61 ms. Allocated memory is still 377.5 MB. Free memory was 341.3 MB in the beginning and 339.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 23.66 ms. Allocated memory is still 377.5 MB. Free memory was 339.3 MB in the beginning and 338.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 377.36 ms. Allocated memory is still 377.5 MB. Free memory was 338.2 MB in the beginning and 314.3 MB in the end (delta: 23.9 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 3191.12 ms. Allocated memory was 377.5 MB in the beginning and 455.1 MB in the end (delta: 77.6 MB). Free memory was 313.3 MB in the beginning and 195.4 MB in the end (delta: 117.9 MB). Peak memory consumption was 197.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1799.3ms, 68 PlacesBefore, 27 PlacesAfterwards, 59 TransitionsBefore, 18 TransitionsAfterwards, 864 CoEnabledTransitionPairs, 6 FixpointIterations, 17 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 0 ChoiceCompositions, 46 TotalNumberOfCompositions, 1773 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 887, positive: 797, positive conditional: 0, positive unconditional: 797, negative: 90, negative conditional: 0, negative unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 585, positive: 550, positive conditional: 0, positive unconditional: 550, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 585, positive: 540, positive conditional: 0, positive unconditional: 540, negative: 45, negative conditional: 0, negative unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 45, positive: 10, positive conditional: 0, positive unconditional: 10, negative: 35, negative conditional: 0, negative unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 175, positive: 47, positive conditional: 0, positive unconditional: 47, negative: 128, negative conditional: 0, negative unconditional: 128, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 887, positive: 247, positive conditional: 0, positive unconditional: 247, negative: 55, negative conditional: 0, negative unconditional: 55, unknown: 585, unknown conditional: 0, unknown unconditional: 585] , Statistics on independence cache: Total cache size (in pairs): 58, Positive cache size: 45, Positive conditional cache size: 0, Positive unconditional cache size: 45, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 3114.3ms, OverallIterations: 12, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 534.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1868.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 65 SDtfs, 40 SDslu, 42 SDs, 0 SdLazy, 167 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 102.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 138.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=294occurred in iteration=9, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 18.7ms SsaConstructionTime, 147.9ms SatisfiabilityAnalysisTime, 370.4ms InterpolantComputationTime, 140 NumberOfCodeBlocks, 140 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 128 ConstructedInterpolants, 0 QuantifiedInterpolants, 472 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...