/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 00:00:07,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 00:00:07,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 00:00:07,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 00:00:07,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 00:00:07,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 00:00:07,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 00:00:07,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 00:00:07,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 00:00:07,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 00:00:07,622 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 00:00:07,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 00:00:07,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 00:00:07,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 00:00:07,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 00:00:07,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 00:00:07,627 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 00:00:07,628 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 00:00:07,629 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 00:00:07,631 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 00:00:07,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 00:00:07,633 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 00:00:07,634 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 00:00:07,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 00:00:07,637 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-16 00:00:07,638 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-16 00:00:07,638 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-16 00:00:07,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-16 00:00:07,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-16 00:00:07,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-16 00:00:07,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 00:00:07,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 00:00:07,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 00:00:07,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 00:00:07,648 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 00:00:07,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 00:00:07,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 00:00:07,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 00:00:07,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 00:00:07,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 00:00:07,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 00:00:07,658 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 [2020-10-16 00:00:07,705 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 00:00:07,706 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 00:00:07,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 00:00:07,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 00:00:07,709 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 00:00:07,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 00:00:07,710 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 00:00:07,710 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 00:00:07,710 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 00:00:07,710 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 00:00:07,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 00:00:07,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 00:00:07,711 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 00:00:07,711 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 00:00:07,711 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 00:00:07,711 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 00:00:07,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 00:00:07,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 00:00:07,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 00:00:07,714 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 00:00:07,714 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 00:00:07,714 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 00:00:07,714 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 00:00:07,715 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 00:00:07,715 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 00:00:07,715 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 00:00:07,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 00:00:07,715 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 00:00:07,715 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 00:00:08,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 00:00:08,032 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 00:00:08,036 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 00:00:08,038 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 00:00:08,038 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 00:00:08,039 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-1.i [2020-10-16 00:00:08,109 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c21c7254e/5b394477f4cc4017a2c62774fb7a084c/FLAGb080bd70c [2020-10-16 00:00:08,608 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 00:00:08,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-1.i [2020-10-16 00:00:08,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c21c7254e/5b394477f4cc4017a2c62774fb7a084c/FLAGb080bd70c [2020-10-16 00:00:08,931 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c21c7254e/5b394477f4cc4017a2c62774fb7a084c [2020-10-16 00:00:08,942 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 00:00:08,944 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 00:00:08,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 00:00:08,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 00:00:08,950 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 00:00:08,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:00:08" (1/1) ... [2020-10-16 00:00:08,953 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e93a288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:08, skipping insertion in model container [2020-10-16 00:00:08,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 12:00:08" (1/1) ... [2020-10-16 00:00:08,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 00:00:09,004 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 00:00:09,452 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 00:00:09,464 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 00:00:09,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 00:00:09,577 INFO L208 MainTranslator]: Completed translation [2020-10-16 00:00:09,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:09 WrapperNode [2020-10-16 00:00:09,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 00:00:09,578 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 00:00:09,578 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 00:00:09,579 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 00:00:09,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:09" (1/1) ... [2020-10-16 00:00:09,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:09" (1/1) ... [2020-10-16 00:00:09,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 00:00:09,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 00:00:09,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 00:00:09,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 00:00:09,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:09" (1/1) ... [2020-10-16 00:00:09,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:09" (1/1) ... [2020-10-16 00:00:09,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:09" (1/1) ... [2020-10-16 00:00:09,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:09" (1/1) ... [2020-10-16 00:00:09,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:09" (1/1) ... [2020-10-16 00:00:09,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:09" (1/1) ... [2020-10-16 00:00:09,651 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:09" (1/1) ... [2020-10-16 00:00:09,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 00:00:09,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 00:00:09,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 00:00:09,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 00:00:09,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 00:00:09,732 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-16 00:00:09,732 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-16 00:00:09,732 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-16 00:00:09,732 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-16 00:00:09,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 00:00:09,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 00:00:09,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 00:00:09,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 00:00:09,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 00:00:09,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 00:00:09,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 00:00:09,737 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 00:00:10,055 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 00:00:10,055 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 00:00:10,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:00:10 BoogieIcfgContainer [2020-10-16 00:00:10,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 00:00:10,059 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 00:00:10,059 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 00:00:10,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 00:00:10,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 12:00:08" (1/3) ... [2020-10-16 00:00:10,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6977a408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:00:10, skipping insertion in model container [2020-10-16 00:00:10,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 12:00:09" (2/3) ... [2020-10-16 00:00:10,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6977a408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 12:00:10, skipping insertion in model container [2020-10-16 00:00:10,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 12:00:10" (3/3) ... [2020-10-16 00:00:10,066 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-1.i [2020-10-16 00:00:10,092 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 00:00:10,102 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 00:00:10,103 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 00:00:10,141 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,142 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,142 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,142 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,143 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,143 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,143 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,144 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,144 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,144 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,144 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,145 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,145 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,145 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,146 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,146 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,146 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,146 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,147 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,147 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,147 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,147 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,148 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,148 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,148 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,148 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,149 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,149 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,152 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,153 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,153 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,153 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,153 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,154 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,159 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,159 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,159 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,160 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,160 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,160 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 00:00:10,177 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 00:00:10,197 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 00:00:10,197 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 00:00:10,197 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 00:00:10,198 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 00:00:10,198 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 00:00:10,198 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 00:00:10,198 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 00:00:10,198 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 00:00:10,209 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 00:00:10,244 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 00:00:10,244 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 00:00:10,252 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-16 00:00:10,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 120 flow [2020-10-16 00:00:10,259 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 53 transitions, 112 flow [2020-10-16 00:00:10,262 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 00:00:10,264 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 53 transitions, 112 flow [2020-10-16 00:00:10,268 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 53 transitions, 112 flow [2020-10-16 00:00:10,268 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions, 112 flow [2020-10-16 00:00:10,286 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-16 00:00:10,287 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 00:00:10,288 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-10-16 00:00:10,290 INFO L117 LiptonReduction]: Number of co-enabled transitions 924 [2020-10-16 00:00:11,520 INFO L132 LiptonReduction]: Checked pairs total: 881 [2020-10-16 00:00:11,520 INFO L134 LiptonReduction]: Total number of compositions: 45 [2020-10-16 00:00:11,523 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1264 [2020-10-16 00:00:11,530 INFO L129 PetriNetUnfolder]: 2/12 cut-off events. [2020-10-16 00:00:11,531 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 00:00:11,531 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:11,532 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-16 00:00:11,532 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:11,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-16 00:00:11,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:11,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838207995] [2020-10-16 00:00:11,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:11,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838207995] [2020-10-16 00:00:11,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 00:00:11,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 00:00:11,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99992904] [2020-10-16 00:00:11,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 00:00:11,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:11,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 00:00:11,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 00:00:11,795 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:11,797 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 13 transitions, 32 flow. Second operand 4 states. [2020-10-16 00:00:11,797 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:11,797 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:11,799 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:11,871 INFO L129 PetriNetUnfolder]: 29/61 cut-off events. [2020-10-16 00:00:11,872 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 00:00:11,872 INFO L80 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 61 events. 29/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 148 event pairs, 4 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 106. Up to 28 conditions per place. [2020-10-16 00:00:11,875 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 7 selfloop transitions, 5 changer transitions 3/22 dead transitions. [2020-10-16 00:00:11,875 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 80 flow [2020-10-16 00:00:11,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 00:00:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 00:00:11,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2020-10-16 00:00:11,894 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.684 [2020-10-16 00:00:11,895 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 342 transitions. [2020-10-16 00:00:11,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 342 transitions. [2020-10-16 00:00:11,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:11,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 342 transitions. [2020-10-16 00:00:11,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 00:00:11,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 00:00:11,915 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 00:00:11,917 INFO L185 Difference]: Start difference. First operand has 18 places, 13 transitions, 32 flow. Second operand 5 states and 342 transitions. [2020-10-16 00:00:11,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 80 flow [2020-10-16 00:00:11,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 22 transitions, 78 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 00:00:11,925 INFO L241 Difference]: Finished difference. Result has 23 places, 16 transitions, 65 flow [2020-10-16 00:00:11,928 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=65, PETRI_PLACES=23, PETRI_TRANSITIONS=16} [2020-10-16 00:00:11,929 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 5 predicate places. [2020-10-16 00:00:11,929 INFO L481 AbstractCegarLoop]: Abstraction has has 23 places, 16 transitions, 65 flow [2020-10-16 00:00:11,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 00:00:11,930 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:11,930 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:11,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 00:00:11,930 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:11,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:11,931 INFO L82 PathProgramCache]: Analyzing trace with hash -2130400634, now seen corresponding path program 1 times [2020-10-16 00:00:11,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:11,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868469281] [2020-10-16 00:00:11,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:12,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:12,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868469281] [2020-10-16 00:00:12,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 00:00:12,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 00:00:12,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100823881] [2020-10-16 00:00:12,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 00:00:12,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:12,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 00:00:12,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-16 00:00:12,026 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:12,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 16 transitions, 65 flow. Second operand 5 states. [2020-10-16 00:00:12,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:12,027 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:12,027 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:12,071 INFO L129 PetriNetUnfolder]: 17/42 cut-off events. [2020-10-16 00:00:12,071 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2020-10-16 00:00:12,072 INFO L80 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 42 events. 17/42 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 82 event pairs, 0 based on Foata normal form. 1/42 useless extension candidates. Maximal degree in co-relation 112. Up to 21 conditions per place. [2020-10-16 00:00:12,073 INFO L132 encePairwiseOnDemand]: 96/100 looper letters, 12 selfloop transitions, 6 changer transitions 0/25 dead transitions. [2020-10-16 00:00:12,073 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 25 transitions, 147 flow [2020-10-16 00:00:12,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 00:00:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 00:00:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 271 transitions. [2020-10-16 00:00:12,076 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6775 [2020-10-16 00:00:12,076 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 271 transitions. [2020-10-16 00:00:12,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 271 transitions. [2020-10-16 00:00:12,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:12,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 271 transitions. [2020-10-16 00:00:12,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 00:00:12,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 00:00:12,080 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 00:00:12,080 INFO L185 Difference]: Start difference. First operand has 23 places, 16 transitions, 65 flow. Second operand 4 states and 271 transitions. [2020-10-16 00:00:12,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 25 transitions, 147 flow [2020-10-16 00:00:12,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 25 transitions, 142 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 00:00:12,082 INFO L241 Difference]: Finished difference. Result has 26 places, 21 transitions, 114 flow [2020-10-16 00:00:12,083 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2020-10-16 00:00:12,083 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 8 predicate places. [2020-10-16 00:00:12,084 INFO L481 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 114 flow [2020-10-16 00:00:12,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 00:00:12,084 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:12,084 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:12,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 00:00:12,085 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:12,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:12,085 INFO L82 PathProgramCache]: Analyzing trace with hash 993324059, now seen corresponding path program 1 times [2020-10-16 00:00:12,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:12,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468119648] [2020-10-16 00:00:12,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:12,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:12,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468119648] [2020-10-16 00:00:12,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 00:00:12,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 00:00:12,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703877229] [2020-10-16 00:00:12,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 00:00:12,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:12,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 00:00:12,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 00:00:12,175 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:12,175 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 114 flow. Second operand 6 states. [2020-10-16 00:00:12,175 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:12,176 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:12,176 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:12,272 INFO L129 PetriNetUnfolder]: 28/67 cut-off events. [2020-10-16 00:00:12,273 INFO L130 PetriNetUnfolder]: For 78/78 co-relation queries the response was YES. [2020-10-16 00:00:12,274 INFO L80 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 67 events. 28/67 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 157 event pairs, 0 based on Foata normal form. 2/68 useless extension candidates. Maximal degree in co-relation 217. Up to 23 conditions per place. [2020-10-16 00:00:12,275 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 13 selfloop transitions, 17 changer transitions 0/37 dead transitions. [2020-10-16 00:00:12,275 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 270 flow [2020-10-16 00:00:12,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 00:00:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 00:00:12,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 542 transitions. [2020-10-16 00:00:12,279 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6775 [2020-10-16 00:00:12,280 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 542 transitions. [2020-10-16 00:00:12,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 542 transitions. [2020-10-16 00:00:12,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:12,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 542 transitions. [2020-10-16 00:00:12,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 00:00:12,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 00:00:12,285 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 00:00:12,286 INFO L185 Difference]: Start difference. First operand has 26 places, 21 transitions, 114 flow. Second operand 8 states and 542 transitions. [2020-10-16 00:00:12,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 270 flow [2020-10-16 00:00:12,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 268 flow, removed 1 selfloop flow, removed 0 redundant places. [2020-10-16 00:00:12,290 INFO L241 Difference]: Finished difference. Result has 37 places, 31 transitions, 245 flow [2020-10-16 00:00:12,290 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2020-10-16 00:00:12,291 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 19 predicate places. [2020-10-16 00:00:12,291 INFO L481 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 245 flow [2020-10-16 00:00:12,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 00:00:12,291 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:12,292 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:12,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 00:00:12,292 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:12,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1383900809, now seen corresponding path program 2 times [2020-10-16 00:00:12,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:12,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350588977] [2020-10-16 00:00:12,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:12,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350588977] [2020-10-16 00:00:12,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 00:00:12,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 00:00:12,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072341028] [2020-10-16 00:00:12,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 00:00:12,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:12,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 00:00:12,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-16 00:00:12,369 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:12,369 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 245 flow. Second operand 6 states. [2020-10-16 00:00:12,369 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:12,369 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:12,370 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:12,460 INFO L129 PetriNetUnfolder]: 25/61 cut-off events. [2020-10-16 00:00:12,461 INFO L130 PetriNetUnfolder]: For 207/213 co-relation queries the response was YES. [2020-10-16 00:00:12,461 INFO L80 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 61 events. 25/61 cut-off events. For 207/213 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 149 event pairs, 0 based on Foata normal form. 4/64 useless extension candidates. Maximal degree in co-relation 276. Up to 23 conditions per place. [2020-10-16 00:00:12,463 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 12 selfloop transitions, 18 changer transitions 0/37 dead transitions. [2020-10-16 00:00:12,463 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 371 flow [2020-10-16 00:00:12,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 00:00:12,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 00:00:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 474 transitions. [2020-10-16 00:00:12,465 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6771428571428572 [2020-10-16 00:00:12,465 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 474 transitions. [2020-10-16 00:00:12,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 474 transitions. [2020-10-16 00:00:12,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:12,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 474 transitions. [2020-10-16 00:00:12,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 00:00:12,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 00:00:12,469 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 00:00:12,470 INFO L185 Difference]: Start difference. First operand has 37 places, 31 transitions, 245 flow. Second operand 7 states and 474 transitions. [2020-10-16 00:00:12,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 371 flow [2020-10-16 00:00:12,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 37 transitions, 338 flow, removed 9 selfloop flow, removed 3 redundant places. [2020-10-16 00:00:12,475 INFO L241 Difference]: Finished difference. Result has 42 places, 32 transitions, 280 flow [2020-10-16 00:00:12,476 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=280, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2020-10-16 00:00:12,476 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 24 predicate places. [2020-10-16 00:00:12,476 INFO L481 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 280 flow [2020-10-16 00:00:12,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 00:00:12,476 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:12,477 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:12,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 00:00:12,477 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:12,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:12,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1013031689, now seen corresponding path program 3 times [2020-10-16 00:00:12,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:12,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397203884] [2020-10-16 00:00:12,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:12,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397203884] [2020-10-16 00:00:12,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 00:00:12,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 00:00:12,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27421433] [2020-10-16 00:00:12,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 00:00:12,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:12,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 00:00:12,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 00:00:12,533 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:12,533 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 280 flow. Second operand 6 states. [2020-10-16 00:00:12,533 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:12,534 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:12,534 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:12,620 INFO L129 PetriNetUnfolder]: 30/73 cut-off events. [2020-10-16 00:00:12,621 INFO L130 PetriNetUnfolder]: For 319/325 co-relation queries the response was YES. [2020-10-16 00:00:12,622 INFO L80 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 73 events. 30/73 cut-off events. For 319/325 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 207 event pairs, 0 based on Foata normal form. 2/75 useless extension candidates. Maximal degree in co-relation 357. Up to 34 conditions per place. [2020-10-16 00:00:12,623 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 21 selfloop transitions, 16 changer transitions 0/44 dead transitions. [2020-10-16 00:00:12,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 44 transitions, 484 flow [2020-10-16 00:00:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 00:00:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 00:00:12,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 474 transitions. [2020-10-16 00:00:12,626 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6771428571428572 [2020-10-16 00:00:12,626 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 474 transitions. [2020-10-16 00:00:12,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 474 transitions. [2020-10-16 00:00:12,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:12,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 474 transitions. [2020-10-16 00:00:12,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 00:00:12,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 00:00:12,629 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 00:00:12,629 INFO L185 Difference]: Start difference. First operand has 42 places, 32 transitions, 280 flow. Second operand 7 states and 474 transitions. [2020-10-16 00:00:12,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 44 transitions, 484 flow [2020-10-16 00:00:12,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 434 flow, removed 8 selfloop flow, removed 5 redundant places. [2020-10-16 00:00:12,635 INFO L241 Difference]: Finished difference. Result has 46 places, 39 transitions, 370 flow [2020-10-16 00:00:12,635 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=370, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2020-10-16 00:00:12,635 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 28 predicate places. [2020-10-16 00:00:12,636 INFO L481 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 370 flow [2020-10-16 00:00:12,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 00:00:12,636 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:12,636 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:12,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 00:00:12,636 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:12,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:12,637 INFO L82 PathProgramCache]: Analyzing trace with hash 728810004, now seen corresponding path program 4 times [2020-10-16 00:00:12,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:12,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726064156] [2020-10-16 00:00:12,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:12,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726064156] [2020-10-16 00:00:12,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999914471] [2020-10-16 00:00:12,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:12,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:00:12,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:12,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 00:00:12,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:12,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:00:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:12,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:12,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 00:00:12,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977699120] [2020-10-16 00:00:12,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 00:00:12,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:12,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 00:00:12,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-16 00:00:12,818 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:12,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 370 flow. Second operand 8 states. [2020-10-16 00:00:12,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:12,819 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:12,819 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:12,927 INFO L129 PetriNetUnfolder]: 33/80 cut-off events. [2020-10-16 00:00:12,927 INFO L130 PetriNetUnfolder]: For 371/376 co-relation queries the response was YES. [2020-10-16 00:00:12,928 INFO L80 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 80 events. 33/80 cut-off events. For 371/376 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 232 event pairs, 0 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 411. Up to 33 conditions per place. [2020-10-16 00:00:12,929 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 13 selfloop transitions, 28 changer transitions 0/48 dead transitions. [2020-10-16 00:00:12,929 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 566 flow [2020-10-16 00:00:12,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 00:00:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 00:00:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 541 transitions. [2020-10-16 00:00:12,932 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67625 [2020-10-16 00:00:12,932 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 541 transitions. [2020-10-16 00:00:12,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 541 transitions. [2020-10-16 00:00:12,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:12,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 541 transitions. [2020-10-16 00:00:12,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 00:00:12,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 00:00:12,936 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 00:00:12,936 INFO L185 Difference]: Start difference. First operand has 46 places, 39 transitions, 370 flow. Second operand 8 states and 541 transitions. [2020-10-16 00:00:12,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 566 flow [2020-10-16 00:00:12,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 48 transitions, 548 flow, removed 5 selfloop flow, removed 1 redundant places. [2020-10-16 00:00:12,941 INFO L241 Difference]: Finished difference. Result has 54 places, 42 transitions, 474 flow [2020-10-16 00:00:12,942 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=474, PETRI_PLACES=54, PETRI_TRANSITIONS=42} [2020-10-16 00:00:12,942 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 36 predicate places. [2020-10-16 00:00:12,942 INFO L481 AbstractCegarLoop]: Abstraction has has 54 places, 42 transitions, 474 flow [2020-10-16 00:00:12,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 00:00:12,942 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:12,943 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:13,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 00:00:13,160 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:13,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:13,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1735406889, now seen corresponding path program 5 times [2020-10-16 00:00:13,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:13,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545204640] [2020-10-16 00:00:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:13,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:13,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545204640] [2020-10-16 00:00:13,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412190727] [2020-10-16 00:00:13,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:13,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:00:13,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:13,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 00:00:13,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:13,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:13,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-16 00:00:13,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38470665] [2020-10-16 00:00:13,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 00:00:13,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:13,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 00:00:13,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-16 00:00:13,327 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:13,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 42 transitions, 474 flow. Second operand 7 states. [2020-10-16 00:00:13,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:13,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:13,329 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:13,421 INFO L129 PetriNetUnfolder]: 35/85 cut-off events. [2020-10-16 00:00:13,421 INFO L130 PetriNetUnfolder]: For 593/602 co-relation queries the response was YES. [2020-10-16 00:00:13,422 INFO L80 FinitePrefix]: Finished finitePrefix Result has 519 conditions, 85 events. 35/85 cut-off events. For 593/602 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 245 event pairs, 0 based on Foata normal form. 11/96 useless extension candidates. Maximal degree in co-relation 490. Up to 44 conditions per place. [2020-10-16 00:00:13,424 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 28 selfloop transitions, 15 changer transitions 0/50 dead transitions. [2020-10-16 00:00:13,424 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 674 flow [2020-10-16 00:00:13,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 00:00:13,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 00:00:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 540 transitions. [2020-10-16 00:00:13,427 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 00:00:13,427 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 540 transitions. [2020-10-16 00:00:13,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 540 transitions. [2020-10-16 00:00:13,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:13,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 540 transitions. [2020-10-16 00:00:13,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 00:00:13,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 00:00:13,430 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 00:00:13,431 INFO L185 Difference]: Start difference. First operand has 54 places, 42 transitions, 474 flow. Second operand 8 states and 540 transitions. [2020-10-16 00:00:13,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 674 flow [2020-10-16 00:00:13,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 50 transitions, 622 flow, removed 8 selfloop flow, removed 5 redundant places. [2020-10-16 00:00:13,438 INFO L241 Difference]: Finished difference. Result has 59 places, 45 transitions, 509 flow [2020-10-16 00:00:13,439 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=509, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2020-10-16 00:00:13,439 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 41 predicate places. [2020-10-16 00:00:13,439 INFO L481 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 509 flow [2020-10-16 00:00:13,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 00:00:13,439 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:13,440 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:13,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:13,655 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:13,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:13,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1339228555, now seen corresponding path program 6 times [2020-10-16 00:00:13,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:13,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360776154] [2020-10-16 00:00:13,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:13,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360776154] [2020-10-16 00:00:13,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114372660] [2020-10-16 00:00:13,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:13,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-16 00:00:13,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:13,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 00:00:13,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:13,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:13,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 00:00:13,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015468011] [2020-10-16 00:00:13,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 00:00:13,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:13,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 00:00:13,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-16 00:00:13,817 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:13,818 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 509 flow. Second operand 8 states. [2020-10-16 00:00:13,818 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:13,818 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:13,819 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:14,010 INFO L129 PetriNetUnfolder]: 39/95 cut-off events. [2020-10-16 00:00:14,011 INFO L130 PetriNetUnfolder]: For 807/809 co-relation queries the response was YES. [2020-10-16 00:00:14,012 INFO L80 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 95 events. 39/95 cut-off events. For 807/809 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 296 event pairs, 0 based on Foata normal form. 4/99 useless extension candidates. Maximal degree in co-relation 579. Up to 43 conditions per place. [2020-10-16 00:00:14,013 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 25 selfloop transitions, 24 changer transitions 0/56 dead transitions. [2020-10-16 00:00:14,013 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 56 transitions, 789 flow [2020-10-16 00:00:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 00:00:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-16 00:00:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 744 transitions. [2020-10-16 00:00:14,017 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6763636363636364 [2020-10-16 00:00:14,017 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 744 transitions. [2020-10-16 00:00:14,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 744 transitions. [2020-10-16 00:00:14,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:14,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 744 transitions. [2020-10-16 00:00:14,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-16 00:00:14,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-16 00:00:14,022 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-16 00:00:14,022 INFO L185 Difference]: Start difference. First operand has 59 places, 45 transitions, 509 flow. Second operand 11 states and 744 transitions. [2020-10-16 00:00:14,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 56 transitions, 789 flow [2020-10-16 00:00:14,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 56 transitions, 722 flow, removed 25 selfloop flow, removed 3 redundant places. [2020-10-16 00:00:14,030 INFO L241 Difference]: Finished difference. Result has 69 places, 49 transitions, 594 flow [2020-10-16 00:00:14,030 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=594, PETRI_PLACES=69, PETRI_TRANSITIONS=49} [2020-10-16 00:00:14,031 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 51 predicate places. [2020-10-16 00:00:14,031 INFO L481 AbstractCegarLoop]: Abstraction has has 69 places, 49 transitions, 594 flow [2020-10-16 00:00:14,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 00:00:14,031 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:14,031 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:14,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:14,246 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:14,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:14,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1051578980, now seen corresponding path program 7 times [2020-10-16 00:00:14,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:14,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129246123] [2020-10-16 00:00:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:14,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129246123] [2020-10-16 00:00:14,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072024217] [2020-10-16 00:00:14,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:14,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 00:00:14,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:14,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:14,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 00:00:14,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762578749] [2020-10-16 00:00:14,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 00:00:14,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:14,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 00:00:14,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 00:00:14,427 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:14,428 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 49 transitions, 594 flow. Second operand 8 states. [2020-10-16 00:00:14,428 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:14,428 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:14,428 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:14,562 INFO L129 PetriNetUnfolder]: 41/102 cut-off events. [2020-10-16 00:00:14,562 INFO L130 PetriNetUnfolder]: For 952/961 co-relation queries the response was YES. [2020-10-16 00:00:14,563 INFO L80 FinitePrefix]: Finished finitePrefix Result has 691 conditions, 102 events. 41/102 cut-off events. For 952/961 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 329 event pairs, 0 based on Foata normal form. 7/109 useless extension candidates. Maximal degree in co-relation 656. Up to 47 conditions per place. [2020-10-16 00:00:14,565 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 25 selfloop transitions, 26 changer transitions 0/58 dead transitions. [2020-10-16 00:00:14,565 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 58 transitions, 858 flow [2020-10-16 00:00:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 00:00:14,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-16 00:00:14,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 675 transitions. [2020-10-16 00:00:14,569 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 00:00:14,569 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 675 transitions. [2020-10-16 00:00:14,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 675 transitions. [2020-10-16 00:00:14,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:14,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 675 transitions. [2020-10-16 00:00:14,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-16 00:00:14,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-16 00:00:14,573 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-16 00:00:14,573 INFO L185 Difference]: Start difference. First operand has 69 places, 49 transitions, 594 flow. Second operand 10 states and 675 transitions. [2020-10-16 00:00:14,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 58 transitions, 858 flow [2020-10-16 00:00:14,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 58 transitions, 785 flow, removed 22 selfloop flow, removed 5 redundant places. [2020-10-16 00:00:14,582 INFO L241 Difference]: Finished difference. Result has 75 places, 51 transitions, 632 flow [2020-10-16 00:00:14,582 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=632, PETRI_PLACES=75, PETRI_TRANSITIONS=51} [2020-10-16 00:00:14,583 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 57 predicate places. [2020-10-16 00:00:14,583 INFO L481 AbstractCegarLoop]: Abstraction has has 75 places, 51 transitions, 632 flow [2020-10-16 00:00:14,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 00:00:14,583 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:14,583 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:14,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:14,798 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:14,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:14,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1117784062, now seen corresponding path program 8 times [2020-10-16 00:00:14,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:14,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373222538] [2020-10-16 00:00:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:14,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373222538] [2020-10-16 00:00:14,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063286937] [2020-10-16 00:00:14,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:14,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:00:14,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:14,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 00:00:14,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:14,929 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:14,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:14,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:14,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 00:00:14,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147350368] [2020-10-16 00:00:14,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 00:00:14,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:14,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 00:00:14,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-16 00:00:14,952 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:14,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 51 transitions, 632 flow. Second operand 9 states. [2020-10-16 00:00:14,953 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:14,953 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:14,953 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:15,135 INFO L129 PetriNetUnfolder]: 45/114 cut-off events. [2020-10-16 00:00:15,135 INFO L130 PetriNetUnfolder]: For 1113/1115 co-relation queries the response was YES. [2020-10-16 00:00:15,136 INFO L80 FinitePrefix]: Finished finitePrefix Result has 792 conditions, 114 events. 45/114 cut-off events. For 1113/1115 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 396 event pairs, 0 based on Foata normal form. 4/118 useless extension candidates. Maximal degree in co-relation 756. Up to 55 conditions per place. [2020-10-16 00:00:15,138 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 23 selfloop transitions, 32 changer transitions 0/62 dead transitions. [2020-10-16 00:00:15,138 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 62 transitions, 936 flow [2020-10-16 00:00:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-16 00:00:15,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-16 00:00:15,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 743 transitions. [2020-10-16 00:00:15,145 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754545454545454 [2020-10-16 00:00:15,145 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 743 transitions. [2020-10-16 00:00:15,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 743 transitions. [2020-10-16 00:00:15,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:15,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 743 transitions. [2020-10-16 00:00:15,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 12 states. [2020-10-16 00:00:15,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 12 states. [2020-10-16 00:00:15,151 INFO L81 ComplementDD]: Finished complementDD. Result 12 states. [2020-10-16 00:00:15,151 INFO L185 Difference]: Start difference. First operand has 75 places, 51 transitions, 632 flow. Second operand 11 states and 743 transitions. [2020-10-16 00:00:15,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 62 transitions, 936 flow [2020-10-16 00:00:15,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 62 transitions, 857 flow, removed 18 selfloop flow, removed 7 redundant places. [2020-10-16 00:00:15,160 INFO L241 Difference]: Finished difference. Result has 80 places, 55 transitions, 714 flow [2020-10-16 00:00:15,161 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=714, PETRI_PLACES=80, PETRI_TRANSITIONS=55} [2020-10-16 00:00:15,161 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 62 predicate places. [2020-10-16 00:00:15,161 INFO L481 AbstractCegarLoop]: Abstraction has has 80 places, 55 transitions, 714 flow [2020-10-16 00:00:15,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 00:00:15,161 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:15,161 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:15,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 00:00:15,377 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:15,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:15,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1510678266, now seen corresponding path program 9 times [2020-10-16 00:00:15,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:15,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547337569] [2020-10-16 00:00:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:15,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:15,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547337569] [2020-10-16 00:00:15,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113263691] [2020-10-16 00:00:15,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:15,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 00:00:15,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:15,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 00:00:15,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:15,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:15,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-16 00:00:15,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946736659] [2020-10-16 00:00:15,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 00:00:15,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:15,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 00:00:15,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-16 00:00:15,510 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:15,511 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 55 transitions, 714 flow. Second operand 8 states. [2020-10-16 00:00:15,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:15,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:15,511 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:15,689 INFO L129 PetriNetUnfolder]: 56/139 cut-off events. [2020-10-16 00:00:15,689 INFO L130 PetriNetUnfolder]: For 1641/1643 co-relation queries the response was YES. [2020-10-16 00:00:15,691 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1036 conditions, 139 events. 56/139 cut-off events. For 1641/1643 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 496 event pairs, 0 based on Foata normal form. 2/141 useless extension candidates. Maximal degree in co-relation 998. Up to 73 conditions per place. [2020-10-16 00:00:15,693 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 19 selfloop transitions, 47 changer transitions 0/73 dead transitions. [2020-10-16 00:00:15,693 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 73 transitions, 1192 flow [2020-10-16 00:00:15,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 00:00:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 00:00:15,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 812 transitions. [2020-10-16 00:00:15,698 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6766666666666666 [2020-10-16 00:00:15,698 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 812 transitions. [2020-10-16 00:00:15,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 812 transitions. [2020-10-16 00:00:15,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:15,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 812 transitions. [2020-10-16 00:00:15,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 00:00:15,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 00:00:15,705 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 00:00:15,705 INFO L185 Difference]: Start difference. First operand has 80 places, 55 transitions, 714 flow. Second operand 12 states and 812 transitions. [2020-10-16 00:00:15,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 73 transitions, 1192 flow [2020-10-16 00:00:15,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 73 transitions, 1061 flow, removed 38 selfloop flow, removed 9 redundant places. [2020-10-16 00:00:15,718 INFO L241 Difference]: Finished difference. Result has 86 places, 63 transitions, 894 flow [2020-10-16 00:00:15,719 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=894, PETRI_PLACES=86, PETRI_TRANSITIONS=63} [2020-10-16 00:00:15,719 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 68 predicate places. [2020-10-16 00:00:15,719 INFO L481 AbstractCegarLoop]: Abstraction has has 86 places, 63 transitions, 894 flow [2020-10-16 00:00:15,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 00:00:15,719 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:15,720 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:15,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:15,935 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:15,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1118290912, now seen corresponding path program 10 times [2020-10-16 00:00:15,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:15,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198546164] [2020-10-16 00:00:15,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:15,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198546164] [2020-10-16 00:00:15,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773122] [2020-10-16 00:00:15,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:16,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:00:16,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:16,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 00:00:16,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:16,111 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:16,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:16,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:16,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 00:00:16,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006834639] [2020-10-16 00:00:16,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 00:00:16,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:16,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 00:00:16,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-16 00:00:16,122 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:16,123 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 63 transitions, 894 flow. Second operand 9 states. [2020-10-16 00:00:16,123 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:16,123 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:16,123 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:16,383 INFO L129 PetriNetUnfolder]: 53/133 cut-off events. [2020-10-16 00:00:16,384 INFO L130 PetriNetUnfolder]: For 1900/1906 co-relation queries the response was YES. [2020-10-16 00:00:16,386 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 133 events. 53/133 cut-off events. For 1900/1906 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 490 event pairs, 0 based on Foata normal form. 8/141 useless extension candidates. Maximal degree in co-relation 1022. Up to 69 conditions per place. [2020-10-16 00:00:16,389 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 16 selfloop transitions, 50 changer transitions 0/73 dead transitions. [2020-10-16 00:00:16,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 73 transitions, 1256 flow [2020-10-16 00:00:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 00:00:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 00:00:16,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 879 transitions. [2020-10-16 00:00:16,396 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6761538461538461 [2020-10-16 00:00:16,396 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 879 transitions. [2020-10-16 00:00:16,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 879 transitions. [2020-10-16 00:00:16,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:16,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 879 transitions. [2020-10-16 00:00:16,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 00:00:16,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 00:00:16,405 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 00:00:16,405 INFO L185 Difference]: Start difference. First operand has 86 places, 63 transitions, 894 flow. Second operand 13 states and 879 transitions. [2020-10-16 00:00:16,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 73 transitions, 1256 flow [2020-10-16 00:00:16,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 73 transitions, 1123 flow, removed 38 selfloop flow, removed 7 redundant places. [2020-10-16 00:00:16,424 INFO L241 Difference]: Finished difference. Result has 93 places, 64 transitions, 922 flow [2020-10-16 00:00:16,425 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=922, PETRI_PLACES=93, PETRI_TRANSITIONS=64} [2020-10-16 00:00:16,425 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 75 predicate places. [2020-10-16 00:00:16,425 INFO L481 AbstractCegarLoop]: Abstraction has has 93 places, 64 transitions, 922 flow [2020-10-16 00:00:16,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 00:00:16,425 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:16,425 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:16,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:16,638 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:16,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:16,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1433571448, now seen corresponding path program 11 times [2020-10-16 00:00:16,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:16,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281463534] [2020-10-16 00:00:16,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:16,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:16,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281463534] [2020-10-16 00:00:16,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884520657] [2020-10-16 00:00:16,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:16,738 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:00:16,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:16,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 00:00:16,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:16,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:00:16,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:16,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:16,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 00:00:16,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479590173] [2020-10-16 00:00:16,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 00:00:16,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:16,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 00:00:16,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-16 00:00:16,773 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:16,774 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 64 transitions, 922 flow. Second operand 9 states. [2020-10-16 00:00:16,774 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:16,774 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:16,774 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:16,972 INFO L129 PetriNetUnfolder]: 56/139 cut-off events. [2020-10-16 00:00:16,972 INFO L130 PetriNetUnfolder]: For 2179/2181 co-relation queries the response was YES. [2020-10-16 00:00:16,973 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 139 events. 56/139 cut-off events. For 2179/2181 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 517 event pairs, 0 based on Foata normal form. 3/142 useless extension candidates. Maximal degree in co-relation 1093. Up to 69 conditions per place. [2020-10-16 00:00:16,975 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 34 changer transitions 0/76 dead transitions. [2020-10-16 00:00:16,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 76 transitions, 1322 flow [2020-10-16 00:00:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 00:00:16,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 00:00:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 811 transitions. [2020-10-16 00:00:16,979 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 00:00:16,979 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 811 transitions. [2020-10-16 00:00:16,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 811 transitions. [2020-10-16 00:00:16,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:16,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 811 transitions. [2020-10-16 00:00:16,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 00:00:16,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 00:00:16,984 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 00:00:16,985 INFO L185 Difference]: Start difference. First operand has 93 places, 64 transitions, 922 flow. Second operand 12 states and 811 transitions. [2020-10-16 00:00:16,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 76 transitions, 1322 flow [2020-10-16 00:00:16,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 76 transitions, 1162 flow, removed 38 selfloop flow, removed 11 redundant places. [2020-10-16 00:00:16,998 INFO L241 Difference]: Finished difference. Result has 95 places, 67 transitions, 954 flow [2020-10-16 00:00:16,999 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=954, PETRI_PLACES=95, PETRI_TRANSITIONS=67} [2020-10-16 00:00:16,999 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 77 predicate places. [2020-10-16 00:00:16,999 INFO L481 AbstractCegarLoop]: Abstraction has has 95 places, 67 transitions, 954 flow [2020-10-16 00:00:16,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 00:00:17,000 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:17,000 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:17,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 00:00:17,215 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:17,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:17,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1246359991, now seen corresponding path program 12 times [2020-10-16 00:00:17,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:17,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525039315] [2020-10-16 00:00:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:17,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525039315] [2020-10-16 00:00:17,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603092844] [2020-10-16 00:00:17,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:17,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 00:00:17,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:17,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 00:00:17,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:17,352 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:00:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:17,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:17,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 00:00:17,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265481954] [2020-10-16 00:00:17,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 00:00:17,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:17,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 00:00:17,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-16 00:00:17,365 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:17,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 67 transitions, 954 flow. Second operand 10 states. [2020-10-16 00:00:17,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:17,366 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:17,366 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:17,579 INFO L129 PetriNetUnfolder]: 59/146 cut-off events. [2020-10-16 00:00:17,580 INFO L130 PetriNetUnfolder]: For 1848/1850 co-relation queries the response was YES. [2020-10-16 00:00:17,581 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 146 events. 59/146 cut-off events. For 1848/1850 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 543 event pairs, 0 based on Foata normal form. 1/147 useless extension candidates. Maximal degree in co-relation 1089. Up to 73 conditions per place. [2020-10-16 00:00:17,584 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 19 selfloop transitions, 54 changer transitions 0/80 dead transitions. [2020-10-16 00:00:17,584 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 80 transitions, 1380 flow [2020-10-16 00:00:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 00:00:17,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 00:00:17,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 811 transitions. [2020-10-16 00:00:17,586 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 00:00:17,587 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 811 transitions. [2020-10-16 00:00:17,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 811 transitions. [2020-10-16 00:00:17,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:17,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 811 transitions. [2020-10-16 00:00:17,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 00:00:17,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 00:00:17,592 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 00:00:17,592 INFO L185 Difference]: Start difference. First operand has 95 places, 67 transitions, 954 flow. Second operand 12 states and 811 transitions. [2020-10-16 00:00:17,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 80 transitions, 1380 flow [2020-10-16 00:00:17,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 80 transitions, 1310 flow, removed 11 selfloop flow, removed 9 redundant places. [2020-10-16 00:00:17,606 INFO L241 Difference]: Finished difference. Result has 99 places, 70 transitions, 1090 flow [2020-10-16 00:00:17,606 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1090, PETRI_PLACES=99, PETRI_TRANSITIONS=70} [2020-10-16 00:00:17,606 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 81 predicate places. [2020-10-16 00:00:17,607 INFO L481 AbstractCegarLoop]: Abstraction has has 99 places, 70 transitions, 1090 flow [2020-10-16 00:00:17,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 00:00:17,607 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:17,607 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:17,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:17,823 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1053734124, now seen corresponding path program 13 times [2020-10-16 00:00:17,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:17,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527121404] [2020-10-16 00:00:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:17,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527121404] [2020-10-16 00:00:17,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379400924] [2020-10-16 00:00:17,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:17,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 00:00:17,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:17,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:17,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-16 00:00:17,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326529741] [2020-10-16 00:00:17,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-16 00:00:17,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:17,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-16 00:00:17,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-16 00:00:17,979 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:17,982 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 70 transitions, 1090 flow. Second operand 9 states. [2020-10-16 00:00:17,982 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:17,982 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:17,983 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:18,119 INFO L129 PetriNetUnfolder]: 61/151 cut-off events. [2020-10-16 00:00:18,119 INFO L130 PetriNetUnfolder]: For 2363/2369 co-relation queries the response was YES. [2020-10-16 00:00:18,121 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1254 conditions, 151 events. 61/151 cut-off events. For 2363/2369 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 571 event pairs, 0 based on Foata normal form. 8/159 useless extension candidates. Maximal degree in co-relation 1208. Up to 88 conditions per place. [2020-10-16 00:00:18,123 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 55 selfloop transitions, 17 changer transitions 0/79 dead transitions. [2020-10-16 00:00:18,123 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 79 transitions, 1454 flow [2020-10-16 00:00:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 00:00:18,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-16 00:00:18,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 674 transitions. [2020-10-16 00:00:18,126 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674 [2020-10-16 00:00:18,126 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 674 transitions. [2020-10-16 00:00:18,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 674 transitions. [2020-10-16 00:00:18,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:18,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 674 transitions. [2020-10-16 00:00:18,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-16 00:00:18,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-16 00:00:18,131 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-16 00:00:18,131 INFO L185 Difference]: Start difference. First operand has 99 places, 70 transitions, 1090 flow. Second operand 10 states and 674 transitions. [2020-10-16 00:00:18,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 79 transitions, 1454 flow [2020-10-16 00:00:18,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 79 transitions, 1330 flow, removed 21 selfloop flow, removed 9 redundant places. [2020-10-16 00:00:18,147 INFO L241 Difference]: Finished difference. Result has 101 places, 72 transitions, 1060 flow [2020-10-16 00:00:18,147 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1060, PETRI_PLACES=101, PETRI_TRANSITIONS=72} [2020-10-16 00:00:18,147 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 83 predicate places. [2020-10-16 00:00:18,148 INFO L481 AbstractCegarLoop]: Abstraction has has 101 places, 72 transitions, 1060 flow [2020-10-16 00:00:18,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-16 00:00:18,148 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:18,148 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:18,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 00:00:18,364 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:18,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:18,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1491024660, now seen corresponding path program 14 times [2020-10-16 00:00:18,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:18,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881407631] [2020-10-16 00:00:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:18,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881407631] [2020-10-16 00:00:18,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898906554] [2020-10-16 00:00:18,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:18,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:00:18,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:18,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 00:00:18,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:18,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:18,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:18,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 00:00:18,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098111921] [2020-10-16 00:00:18,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 00:00:18,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:18,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 00:00:18,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 00:00:18,522 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:18,522 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 72 transitions, 1060 flow. Second operand 10 states. [2020-10-16 00:00:18,522 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:18,522 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:18,523 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:18,814 INFO L129 PetriNetUnfolder]: 65/162 cut-off events. [2020-10-16 00:00:18,814 INFO L130 PetriNetUnfolder]: For 2893/2899 co-relation queries the response was YES. [2020-10-16 00:00:18,816 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1357 conditions, 162 events. 65/162 cut-off events. For 2893/2899 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 625 event pairs, 0 based on Foata normal form. 8/170 useless extension candidates. Maximal degree in co-relation 1309. Up to 83 conditions per place. [2020-10-16 00:00:18,819 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 46 changer transitions 0/88 dead transitions. [2020-10-16 00:00:18,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 88 transitions, 1610 flow [2020-10-16 00:00:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 00:00:18,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-16 00:00:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1014 transitions. [2020-10-16 00:00:18,821 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 00:00:18,822 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1014 transitions. [2020-10-16 00:00:18,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1014 transitions. [2020-10-16 00:00:18,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:18,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1014 transitions. [2020-10-16 00:00:18,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-16 00:00:18,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-16 00:00:18,827 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-16 00:00:18,827 INFO L185 Difference]: Start difference. First operand has 101 places, 72 transitions, 1060 flow. Second operand 15 states and 1014 transitions. [2020-10-16 00:00:18,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 88 transitions, 1610 flow [2020-10-16 00:00:18,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 88 transitions, 1526 flow, removed 27 selfloop flow, removed 7 redundant places. [2020-10-16 00:00:18,843 INFO L241 Difference]: Finished difference. Result has 111 places, 76 transitions, 1211 flow [2020-10-16 00:00:18,844 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=990, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1211, PETRI_PLACES=111, PETRI_TRANSITIONS=76} [2020-10-16 00:00:18,844 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 93 predicate places. [2020-10-16 00:00:18,844 INFO L481 AbstractCegarLoop]: Abstraction has has 111 places, 76 transitions, 1211 flow [2020-10-16 00:00:18,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 00:00:18,844 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:18,845 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:19,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 00:00:19,058 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:19,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:19,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1389554911, now seen corresponding path program 15 times [2020-10-16 00:00:19,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:19,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869700233] [2020-10-16 00:00:19,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:19,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869700233] [2020-10-16 00:00:19,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012247914] [2020-10-16 00:00:19,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:19,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 00:00:19,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:19,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 00:00:19,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:19,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:19,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-16 00:00:19,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808409461] [2020-10-16 00:00:19,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-16 00:00:19,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:19,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-16 00:00:19,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-16 00:00:19,300 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:19,301 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 76 transitions, 1211 flow. Second operand 10 states. [2020-10-16 00:00:19,301 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:19,301 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:19,301 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:19,464 INFO L129 PetriNetUnfolder]: 67/167 cut-off events. [2020-10-16 00:00:19,464 INFO L130 PetriNetUnfolder]: For 3566/3568 co-relation queries the response was YES. [2020-10-16 00:00:19,465 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1505 conditions, 167 events. 67/167 cut-off events. For 3566/3568 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 640 event pairs, 0 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 1454. Up to 87 conditions per place. [2020-10-16 00:00:19,468 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 50 selfloop transitions, 30 changer transitions 0/87 dead transitions. [2020-10-16 00:00:19,469 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 87 transitions, 1677 flow [2020-10-16 00:00:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 00:00:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 00:00:19,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 809 transitions. [2020-10-16 00:00:19,473 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741666666666667 [2020-10-16 00:00:19,473 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 809 transitions. [2020-10-16 00:00:19,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 809 transitions. [2020-10-16 00:00:19,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:19,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 809 transitions. [2020-10-16 00:00:19,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 00:00:19,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 00:00:19,477 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 00:00:19,477 INFO L185 Difference]: Start difference. First operand has 111 places, 76 transitions, 1211 flow. Second operand 12 states and 809 transitions. [2020-10-16 00:00:19,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 87 transitions, 1677 flow [2020-10-16 00:00:19,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 87 transitions, 1536 flow, removed 38 selfloop flow, removed 11 redundant places. [2020-10-16 00:00:19,504 INFO L241 Difference]: Finished difference. Result has 113 places, 78 transitions, 1210 flow [2020-10-16 00:00:19,504 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1210, PETRI_PLACES=113, PETRI_TRANSITIONS=78} [2020-10-16 00:00:19,505 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 95 predicate places. [2020-10-16 00:00:19,505 INFO L481 AbstractCegarLoop]: Abstraction has has 113 places, 78 transitions, 1210 flow [2020-10-16 00:00:19,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-16 00:00:19,505 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:19,505 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:19,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 00:00:19,719 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:19,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:19,720 INFO L82 PathProgramCache]: Analyzing trace with hash -470026489, now seen corresponding path program 16 times [2020-10-16 00:00:19,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:19,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233753549] [2020-10-16 00:00:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:19,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233753549] [2020-10-16 00:00:19,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151067464] [2020-10-16 00:00:19,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:19,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:00:19,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:19,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 00:00:19,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:19,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:19,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:19,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 00:00:19,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877288384] [2020-10-16 00:00:19,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 00:00:19,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 00:00:19,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-16 00:00:19,925 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:19,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 78 transitions, 1210 flow. Second operand 11 states. [2020-10-16 00:00:19,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:19,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:19,927 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:20,188 INFO L129 PetriNetUnfolder]: 71/179 cut-off events. [2020-10-16 00:00:20,188 INFO L130 PetriNetUnfolder]: For 4049/4051 co-relation queries the response was YES. [2020-10-16 00:00:20,190 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1621 conditions, 179 events. 71/179 cut-off events. For 4049/4051 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 714 event pairs, 0 based on Foata normal form. 4/183 useless extension candidates. Maximal degree in co-relation 1568. Up to 95 conditions per place. [2020-10-16 00:00:20,193 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 44 selfloop transitions, 40 changer transitions 0/91 dead transitions. [2020-10-16 00:00:20,193 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 91 transitions, 1722 flow [2020-10-16 00:00:20,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 00:00:20,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 00:00:20,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 877 transitions. [2020-10-16 00:00:20,196 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6746153846153846 [2020-10-16 00:00:20,196 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 877 transitions. [2020-10-16 00:00:20,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 877 transitions. [2020-10-16 00:00:20,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:20,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 877 transitions. [2020-10-16 00:00:20,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 00:00:20,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 00:00:20,200 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 00:00:20,200 INFO L185 Difference]: Start difference. First operand has 113 places, 78 transitions, 1210 flow. Second operand 13 states and 877 transitions. [2020-10-16 00:00:20,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 91 transitions, 1722 flow [2020-10-16 00:00:20,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 91 transitions, 1616 flow, removed 27 selfloop flow, removed 9 redundant places. [2020-10-16 00:00:20,222 INFO L241 Difference]: Finished difference. Result has 118 places, 82 transitions, 1306 flow [2020-10-16 00:00:20,222 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1306, PETRI_PLACES=118, PETRI_TRANSITIONS=82} [2020-10-16 00:00:20,222 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 100 predicate places. [2020-10-16 00:00:20,222 INFO L481 AbstractCegarLoop]: Abstraction has has 118 places, 82 transitions, 1306 flow [2020-10-16 00:00:20,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 00:00:20,223 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:20,223 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:20,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 00:00:20,436 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:20,437 INFO L82 PathProgramCache]: Analyzing trace with hash 17563211, now seen corresponding path program 17 times [2020-10-16 00:00:20,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:20,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066540499] [2020-10-16 00:00:20,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:20,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066540499] [2020-10-16 00:00:20,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457693515] [2020-10-16 00:00:20,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:20,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-16 00:00:20,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:20,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 00:00:20,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:20,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:20,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:20,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 00:00:20,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884508489] [2020-10-16 00:00:20,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 00:00:20,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:20,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 00:00:20,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-16 00:00:20,590 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:20,590 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 82 transitions, 1306 flow. Second operand 11 states. [2020-10-16 00:00:20,591 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:20,591 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:20,591 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:20,918 INFO L129 PetriNetUnfolder]: 75/188 cut-off events. [2020-10-16 00:00:20,919 INFO L130 PetriNetUnfolder]: For 4627/4629 co-relation queries the response was YES. [2020-10-16 00:00:20,920 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1759 conditions, 188 events. 75/188 cut-off events. For 4627/4629 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 747 event pairs, 0 based on Foata normal form. 4/192 useless extension candidates. Maximal degree in co-relation 1704. Up to 101 conditions per place. [2020-10-16 00:00:20,923 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 20 selfloop transitions, 72 changer transitions 0/99 dead transitions. [2020-10-16 00:00:20,924 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 99 transitions, 1986 flow [2020-10-16 00:00:20,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 00:00:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-16 00:00:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1149 transitions. [2020-10-16 00:00:20,926 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758823529411765 [2020-10-16 00:00:20,926 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1149 transitions. [2020-10-16 00:00:20,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1149 transitions. [2020-10-16 00:00:20,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:20,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1149 transitions. [2020-10-16 00:00:20,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-16 00:00:20,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-16 00:00:20,931 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-16 00:00:20,931 INFO L185 Difference]: Start difference. First operand has 118 places, 82 transitions, 1306 flow. Second operand 17 states and 1149 transitions. [2020-10-16 00:00:20,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 99 transitions, 1986 flow [2020-10-16 00:00:20,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 99 transitions, 1838 flow, removed 42 selfloop flow, removed 10 redundant places. [2020-10-16 00:00:20,953 INFO L241 Difference]: Finished difference. Result has 127 places, 86 transitions, 1484 flow [2020-10-16 00:00:20,953 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1484, PETRI_PLACES=127, PETRI_TRANSITIONS=86} [2020-10-16 00:00:20,953 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 109 predicate places. [2020-10-16 00:00:20,954 INFO L481 AbstractCegarLoop]: Abstraction has has 127 places, 86 transitions, 1484 flow [2020-10-16 00:00:20,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 00:00:20,954 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:20,954 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:21,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:21,168 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:21,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1022892103, now seen corresponding path program 18 times [2020-10-16 00:00:21,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:21,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383404906] [2020-10-16 00:00:21,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:21,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:21,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383404906] [2020-10-16 00:00:21,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549979007] [2020-10-16 00:00:21,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:21,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-16 00:00:21,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:21,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 00:00:21,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:21,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:00:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:21,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:21,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-16 00:00:21,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898692708] [2020-10-16 00:00:21,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 00:00:21,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:21,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 00:00:21,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 00:00:21,327 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:21,327 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 86 transitions, 1484 flow. Second operand 11 states. [2020-10-16 00:00:21,327 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:21,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:21,328 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:21,679 INFO L129 PetriNetUnfolder]: 78/195 cut-off events. [2020-10-16 00:00:21,679 INFO L130 PetriNetUnfolder]: For 5048/5050 co-relation queries the response was YES. [2020-10-16 00:00:21,682 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 195 events. 78/195 cut-off events. For 5048/5050 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 783 event pairs, 0 based on Foata normal form. 3/198 useless extension candidates. Maximal degree in co-relation 1849. Up to 105 conditions per place. [2020-10-16 00:00:21,687 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 41 selfloop transitions, 54 changer transitions 0/102 dead transitions. [2020-10-16 00:00:21,687 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 102 transitions, 2138 flow [2020-10-16 00:00:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 00:00:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 00:00:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1081 transitions. [2020-10-16 00:00:21,691 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675625 [2020-10-16 00:00:21,692 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1081 transitions. [2020-10-16 00:00:21,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1081 transitions. [2020-10-16 00:00:21,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:21,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1081 transitions. [2020-10-16 00:00:21,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 00:00:21,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 00:00:21,698 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 00:00:21,698 INFO L185 Difference]: Start difference. First operand has 127 places, 86 transitions, 1484 flow. Second operand 16 states and 1081 transitions. [2020-10-16 00:00:21,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 102 transitions, 2138 flow [2020-10-16 00:00:21,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 102 transitions, 1940 flow, removed 45 selfloop flow, removed 13 redundant places. [2020-10-16 00:00:21,738 INFO L241 Difference]: Finished difference. Result has 131 places, 89 transitions, 1520 flow [2020-10-16 00:00:21,739 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1302, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1520, PETRI_PLACES=131, PETRI_TRANSITIONS=89} [2020-10-16 00:00:21,739 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 113 predicate places. [2020-10-16 00:00:21,739 INFO L481 AbstractCegarLoop]: Abstraction has has 131 places, 89 transitions, 1520 flow [2020-10-16 00:00:21,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 00:00:21,740 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:21,740 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:21,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:21,955 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:21,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:21,956 INFO L82 PathProgramCache]: Analyzing trace with hash 544475848, now seen corresponding path program 19 times [2020-10-16 00:00:21,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:21,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749847621] [2020-10-16 00:00:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:22,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749847621] [2020-10-16 00:00:22,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731036428] [2020-10-16 00:00:22,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:22,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 00:00:22,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:22,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:00:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:22,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:22,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 00:00:22,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604390161] [2020-10-16 00:00:22,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 00:00:22,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:22,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 00:00:22,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 00:00:22,199 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:22,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 89 transitions, 1520 flow. Second operand 12 states. [2020-10-16 00:00:22,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:22,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:22,200 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:22,564 INFO L129 PetriNetUnfolder]: 81/202 cut-off events. [2020-10-16 00:00:22,564 INFO L130 PetriNetUnfolder]: For 5395/5397 co-relation queries the response was YES. [2020-10-16 00:00:22,566 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 202 events. 81/202 cut-off events. For 5395/5397 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 816 event pairs, 0 based on Foata normal form. 1/203 useless extension candidates. Maximal degree in co-relation 1933. Up to 109 conditions per place. [2020-10-16 00:00:22,569 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 23 selfloop transitions, 76 changer transitions 0/106 dead transitions. [2020-10-16 00:00:22,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 106 transitions, 2254 flow [2020-10-16 00:00:22,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 00:00:22,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 00:00:22,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1081 transitions. [2020-10-16 00:00:22,572 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675625 [2020-10-16 00:00:22,572 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1081 transitions. [2020-10-16 00:00:22,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1081 transitions. [2020-10-16 00:00:22,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:22,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1081 transitions. [2020-10-16 00:00:22,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 00:00:22,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 00:00:22,576 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 00:00:22,576 INFO L185 Difference]: Start difference. First operand has 131 places, 89 transitions, 1520 flow. Second operand 16 states and 1081 transitions. [2020-10-16 00:00:22,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 106 transitions, 2254 flow [2020-10-16 00:00:22,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 106 transitions, 2091 flow, removed 39 selfloop flow, removed 13 redundant places. [2020-10-16 00:00:22,604 INFO L241 Difference]: Finished difference. Result has 135 places, 92 transitions, 1647 flow [2020-10-16 00:00:22,604 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1647, PETRI_PLACES=135, PETRI_TRANSITIONS=92} [2020-10-16 00:00:22,604 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 117 predicate places. [2020-10-16 00:00:22,605 INFO L481 AbstractCegarLoop]: Abstraction has has 135 places, 92 transitions, 1647 flow [2020-10-16 00:00:22,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 00:00:22,605 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:22,605 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:22,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:22,821 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:22,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:22,821 INFO L82 PathProgramCache]: Analyzing trace with hash 973804627, now seen corresponding path program 20 times [2020-10-16 00:00:22,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:22,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029452541] [2020-10-16 00:00:22,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:22,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029452541] [2020-10-16 00:00:22,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123390370] [2020-10-16 00:00:22,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:22,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:00:22,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:22,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 00:00:22,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:23,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:23,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 00:00:23,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943011907] [2020-10-16 00:00:23,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 00:00:23,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:23,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 00:00:23,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-16 00:00:23,012 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:23,013 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 92 transitions, 1647 flow. Second operand 11 states. [2020-10-16 00:00:23,013 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:23,013 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:23,013 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:23,186 INFO L129 PetriNetUnfolder]: 83/208 cut-off events. [2020-10-16 00:00:23,187 INFO L130 PetriNetUnfolder]: For 5951/5953 co-relation queries the response was YES. [2020-10-16 00:00:23,189 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 208 events. 83/208 cut-off events. For 5951/5953 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 846 event pairs, 0 based on Foata normal form. 4/212 useless extension candidates. Maximal degree in co-relation 2033. Up to 124 conditions per place. [2020-10-16 00:00:23,192 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 77 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2020-10-16 00:00:23,192 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 103 transitions, 2207 flow [2020-10-16 00:00:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-16 00:00:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-16 00:00:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 808 transitions. [2020-10-16 00:00:23,195 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6733333333333333 [2020-10-16 00:00:23,195 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 808 transitions. [2020-10-16 00:00:23,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 808 transitions. [2020-10-16 00:00:23,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:23,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 808 transitions. [2020-10-16 00:00:23,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 13 states. [2020-10-16 00:00:23,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 13 states. [2020-10-16 00:00:23,199 INFO L81 ComplementDD]: Finished complementDD. Result 13 states. [2020-10-16 00:00:23,199 INFO L185 Difference]: Start difference. First operand has 135 places, 92 transitions, 1647 flow. Second operand 12 states and 808 transitions. [2020-10-16 00:00:23,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 103 transitions, 2207 flow [2020-10-16 00:00:23,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 103 transitions, 2013 flow, removed 32 selfloop flow, removed 13 redundant places. [2020-10-16 00:00:23,229 INFO L241 Difference]: Finished difference. Result has 135 places, 94 transitions, 1569 flow [2020-10-16 00:00:23,230 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1569, PETRI_PLACES=135, PETRI_TRANSITIONS=94} [2020-10-16 00:00:23,230 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 117 predicate places. [2020-10-16 00:00:23,230 INFO L481 AbstractCegarLoop]: Abstraction has has 135 places, 94 transitions, 1569 flow [2020-10-16 00:00:23,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 00:00:23,230 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:23,230 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:23,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 00:00:23,444 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:23,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1417527963, now seen corresponding path program 21 times [2020-10-16 00:00:23,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:23,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337894896] [2020-10-16 00:00:23,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:23,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337894896] [2020-10-16 00:00:23,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020580930] [2020-10-16 00:00:23,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:23,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 00:00:23,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:23,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 00:00:23,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:23,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:23,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:23,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 00:00:23,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502337021] [2020-10-16 00:00:23,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 00:00:23,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:23,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 00:00:23,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-16 00:00:23,599 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:23,600 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 94 transitions, 1569 flow. Second operand 11 states. [2020-10-16 00:00:23,600 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:23,600 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:23,600 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:23,847 INFO L129 PetriNetUnfolder]: 87/218 cut-off events. [2020-10-16 00:00:23,847 INFO L130 PetriNetUnfolder]: For 7106/7108 co-relation queries the response was YES. [2020-10-16 00:00:23,854 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2217 conditions, 218 events. 87/218 cut-off events. For 7106/7108 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 891 event pairs, 0 based on Foata normal form. 4/222 useless extension candidates. Maximal degree in co-relation 2154. Up to 121 conditions per place. [2020-10-16 00:00:23,858 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 66 selfloop transitions, 37 changer transitions 0/110 dead transitions. [2020-10-16 00:00:23,858 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 110 transitions, 2277 flow [2020-10-16 00:00:23,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 00:00:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 00:00:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1079 transitions. [2020-10-16 00:00:23,862 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674375 [2020-10-16 00:00:23,862 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1079 transitions. [2020-10-16 00:00:23,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1079 transitions. [2020-10-16 00:00:23,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:23,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1079 transitions. [2020-10-16 00:00:23,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 00:00:23,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 00:00:23,866 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 00:00:23,866 INFO L185 Difference]: Start difference. First operand has 135 places, 94 transitions, 1569 flow. Second operand 16 states and 1079 transitions. [2020-10-16 00:00:23,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 110 transitions, 2277 flow [2020-10-16 00:00:23,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 110 transitions, 2171 flow, removed 36 selfloop flow, removed 9 redundant places. [2020-10-16 00:00:23,900 INFO L241 Difference]: Finished difference. Result has 146 places, 99 transitions, 1699 flow [2020-10-16 00:00:23,900 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1699, PETRI_PLACES=146, PETRI_TRANSITIONS=99} [2020-10-16 00:00:23,900 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 128 predicate places. [2020-10-16 00:00:23,900 INFO L481 AbstractCegarLoop]: Abstraction has has 146 places, 99 transitions, 1699 flow [2020-10-16 00:00:23,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 00:00:23,901 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:23,901 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:24,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 00:00:24,116 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:24,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:24,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1644884649, now seen corresponding path program 22 times [2020-10-16 00:00:24,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:24,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267210904] [2020-10-16 00:00:24,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:24,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267210904] [2020-10-16 00:00:24,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794729732] [2020-10-16 00:00:24,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:24,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:00:24,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:24,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 00:00:24,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:24,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:24,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-16 00:00:24,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247753870] [2020-10-16 00:00:24,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 00:00:24,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:24,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 00:00:24,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-16 00:00:24,274 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:24,274 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 99 transitions, 1699 flow. Second operand 11 states. [2020-10-16 00:00:24,275 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:24,275 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:24,275 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:24,616 INFO L129 PetriNetUnfolder]: 96/239 cut-off events. [2020-10-16 00:00:24,616 INFO L130 PetriNetUnfolder]: For 8833/8835 co-relation queries the response was YES. [2020-10-16 00:00:24,619 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2578 conditions, 239 events. 96/239 cut-off events. For 8833/8835 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 958 event pairs, 0 based on Foata normal form. 4/243 useless extension candidates. Maximal degree in co-relation 2510. Up to 135 conditions per place. [2020-10-16 00:00:24,623 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 38 selfloop transitions, 76 changer transitions 0/121 dead transitions. [2020-10-16 00:00:24,623 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 121 transitions, 2717 flow [2020-10-16 00:00:24,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 00:00:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 00:00:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1352 transitions. [2020-10-16 00:00:24,626 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 00:00:24,626 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1352 transitions. [2020-10-16 00:00:24,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1352 transitions. [2020-10-16 00:00:24,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:24,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1352 transitions. [2020-10-16 00:00:24,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 00:00:24,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 00:00:24,631 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 00:00:24,631 INFO L185 Difference]: Start difference. First operand has 146 places, 99 transitions, 1699 flow. Second operand 20 states and 1352 transitions. [2020-10-16 00:00:24,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 121 transitions, 2717 flow [2020-10-16 00:00:24,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 121 transitions, 2559 flow, removed 52 selfloop flow, removed 10 redundant places. [2020-10-16 00:00:24,670 INFO L241 Difference]: Finished difference. Result has 159 places, 105 transitions, 1985 flow [2020-10-16 00:00:24,670 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1985, PETRI_PLACES=159, PETRI_TRANSITIONS=105} [2020-10-16 00:00:24,670 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 141 predicate places. [2020-10-16 00:00:24,670 INFO L481 AbstractCegarLoop]: Abstraction has has 159 places, 105 transitions, 1985 flow [2020-10-16 00:00:24,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 00:00:24,671 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:24,671 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:24,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 00:00:24,885 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:24,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1644901389, now seen corresponding path program 23 times [2020-10-16 00:00:24,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:24,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075490340] [2020-10-16 00:00:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:24,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075490340] [2020-10-16 00:00:24,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931808693] [2020-10-16 00:00:24,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:25,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 00:00:25,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:25,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-16 00:00:25,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:25,045 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:25,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:25,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-16 00:00:25,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113959055] [2020-10-16 00:00:25,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 00:00:25,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:25,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 00:00:25,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-16 00:00:25,057 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:25,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 105 transitions, 1985 flow. Second operand 12 states. [2020-10-16 00:00:25,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:25,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:25,058 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:25,447 INFO L129 PetriNetUnfolder]: 93/234 cut-off events. [2020-10-16 00:00:25,448 INFO L130 PetriNetUnfolder]: For 9769/9775 co-relation queries the response was YES. [2020-10-16 00:00:25,450 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2636 conditions, 234 events. 93/234 cut-off events. For 9769/9775 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 971 event pairs, 0 based on Foata normal form. 8/242 useless extension candidates. Maximal degree in co-relation 2564. Up to 131 conditions per place. [2020-10-16 00:00:25,454 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 38 selfloop transitions, 76 changer transitions 0/121 dead transitions. [2020-10-16 00:00:25,454 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 121 transitions, 2843 flow [2020-10-16 00:00:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 00:00:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 00:00:25,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1284 transitions. [2020-10-16 00:00:25,457 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757894736842105 [2020-10-16 00:00:25,457 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1284 transitions. [2020-10-16 00:00:25,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1284 transitions. [2020-10-16 00:00:25,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:25,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1284 transitions. [2020-10-16 00:00:25,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 00:00:25,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 00:00:25,462 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 00:00:25,462 INFO L185 Difference]: Start difference. First operand has 159 places, 105 transitions, 1985 flow. Second operand 19 states and 1284 transitions. [2020-10-16 00:00:25,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 121 transitions, 2843 flow [2020-10-16 00:00:25,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 121 transitions, 2565 flow, removed 80 selfloop flow, removed 17 redundant places. [2020-10-16 00:00:25,506 INFO L241 Difference]: Finished difference. Result has 162 places, 106 transitions, 1941 flow [2020-10-16 00:00:25,506 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1707, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1941, PETRI_PLACES=162, PETRI_TRANSITIONS=106} [2020-10-16 00:00:25,506 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 144 predicate places. [2020-10-16 00:00:25,506 INFO L481 AbstractCegarLoop]: Abstraction has has 162 places, 106 transitions, 1941 flow [2020-10-16 00:00:25,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 00:00:25,507 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:25,507 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:25,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-16 00:00:25,723 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:25,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:25,723 INFO L82 PathProgramCache]: Analyzing trace with hash 372575520, now seen corresponding path program 24 times [2020-10-16 00:00:25,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:25,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922934493] [2020-10-16 00:00:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:25,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922934493] [2020-10-16 00:00:25,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206688767] [2020-10-16 00:00:25,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:25,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-16 00:00:25,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:25,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 00:00:25,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:25,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:25,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 00:00:25,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466640596] [2020-10-16 00:00:25,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 00:00:25,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:25,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 00:00:25,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 00:00:25,922 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:25,922 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 106 transitions, 1941 flow. Second operand 12 states. [2020-10-16 00:00:25,923 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:25,923 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:25,923 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:26,146 INFO L129 PetriNetUnfolder]: 95/240 cut-off events. [2020-10-16 00:00:26,146 INFO L130 PetriNetUnfolder]: For 10532/10534 co-relation queries the response was YES. [2020-10-16 00:00:26,149 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2705 conditions, 240 events. 95/240 cut-off events. For 10532/10534 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1000 event pairs, 0 based on Foata normal form. 2/242 useless extension candidates. Maximal degree in co-relation 2633. Up to 133 conditions per place. [2020-10-16 00:00:26,153 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 78 selfloop transitions, 34 changer transitions 0/119 dead transitions. [2020-10-16 00:00:26,153 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 119 transitions, 2681 flow [2020-10-16 00:00:26,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 00:00:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-16 00:00:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 943 transitions. [2020-10-16 00:00:26,155 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6735714285714286 [2020-10-16 00:00:26,155 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 943 transitions. [2020-10-16 00:00:26,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 943 transitions. [2020-10-16 00:00:26,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:26,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 943 transitions. [2020-10-16 00:00:26,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-16 00:00:26,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-16 00:00:26,159 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-16 00:00:26,159 INFO L185 Difference]: Start difference. First operand has 162 places, 106 transitions, 1941 flow. Second operand 14 states and 943 transitions. [2020-10-16 00:00:26,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 119 transitions, 2681 flow [2020-10-16 00:00:26,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 119 transitions, 2463 flow, removed 41 selfloop flow, removed 17 redundant places. [2020-10-16 00:00:26,201 INFO L241 Difference]: Finished difference. Result has 160 places, 108 transitions, 1919 flow [2020-10-16 00:00:26,201 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1761, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1919, PETRI_PLACES=160, PETRI_TRANSITIONS=108} [2020-10-16 00:00:26,201 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 142 predicate places. [2020-10-16 00:00:26,201 INFO L481 AbstractCegarLoop]: Abstraction has has 160 places, 108 transitions, 1919 flow [2020-10-16 00:00:26,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 00:00:26,202 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:26,202 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:26,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 00:00:26,416 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:26,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:26,417 INFO L82 PathProgramCache]: Analyzing trace with hash -723873914, now seen corresponding path program 25 times [2020-10-16 00:00:26,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:26,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300857312] [2020-10-16 00:00:26,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:26,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:26,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300857312] [2020-10-16 00:00:26,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065663994] [2020-10-16 00:00:26,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:26,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 00:00:26,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:26,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:26,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:26,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 00:00:26,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941268981] [2020-10-16 00:00:26,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 00:00:26,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:26,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 00:00:26,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-16 00:00:26,607 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:26,608 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 108 transitions, 1919 flow. Second operand 13 states. [2020-10-16 00:00:26,608 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:26,608 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:26,608 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:26,878 INFO L129 PetriNetUnfolder]: 99/251 cut-off events. [2020-10-16 00:00:26,879 INFO L130 PetriNetUnfolder]: For 10493/10499 co-relation queries the response was YES. [2020-10-16 00:00:26,880 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2772 conditions, 251 events. 99/251 cut-off events. For 10493/10499 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1068 event pairs, 0 based on Foata normal form. 8/259 useless extension candidates. Maximal degree in co-relation 2698. Up to 141 conditions per place. [2020-10-16 00:00:26,884 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 68 selfloop transitions, 48 changer transitions 0/123 dead transitions. [2020-10-16 00:00:26,884 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 123 transitions, 2688 flow [2020-10-16 00:00:26,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-16 00:00:26,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-16 00:00:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1011 transitions. [2020-10-16 00:00:26,885 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.674 [2020-10-16 00:00:26,885 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1011 transitions. [2020-10-16 00:00:26,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1011 transitions. [2020-10-16 00:00:26,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:26,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1011 transitions. [2020-10-16 00:00:26,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 16 states. [2020-10-16 00:00:26,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 16 states. [2020-10-16 00:00:26,889 INFO L81 ComplementDD]: Finished complementDD. Result 16 states. [2020-10-16 00:00:26,889 INFO L185 Difference]: Start difference. First operand has 160 places, 108 transitions, 1919 flow. Second operand 15 states and 1011 transitions. [2020-10-16 00:00:26,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 123 transitions, 2688 flow [2020-10-16 00:00:26,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 123 transitions, 2556 flow, removed 36 selfloop flow, removed 11 redundant places. [2020-10-16 00:00:26,932 INFO L241 Difference]: Finished difference. Result has 165 places, 112 transitions, 2032 flow [2020-10-16 00:00:26,933 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2032, PETRI_PLACES=165, PETRI_TRANSITIONS=112} [2020-10-16 00:00:26,933 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 147 predicate places. [2020-10-16 00:00:26,933 INFO L481 AbstractCegarLoop]: Abstraction has has 165 places, 112 transitions, 2032 flow [2020-10-16 00:00:26,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 00:00:26,933 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:26,933 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:27,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:27,134 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:27,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:27,135 INFO L82 PathProgramCache]: Analyzing trace with hash -301607478, now seen corresponding path program 26 times [2020-10-16 00:00:27,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:27,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32972544] [2020-10-16 00:00:27,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:27,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:27,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32972544] [2020-10-16 00:00:27,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261642948] [2020-10-16 00:00:27,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:27,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:00:27,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:27,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 00:00:27,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:27,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:27,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:27,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:27,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 00:00:27,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777300305] [2020-10-16 00:00:27,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 00:00:27,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:27,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 00:00:27,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-16 00:00:27,320 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:27,321 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 112 transitions, 2032 flow. Second operand 13 states. [2020-10-16 00:00:27,321 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:27,321 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:27,321 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:27,753 INFO L129 PetriNetUnfolder]: 103/263 cut-off events. [2020-10-16 00:00:27,754 INFO L130 PetriNetUnfolder]: For 11578/11584 co-relation queries the response was YES. [2020-10-16 00:00:27,756 INFO L80 FinitePrefix]: Finished finitePrefix Result has 2967 conditions, 263 events. 103/263 cut-off events. For 11578/11584 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1136 event pairs, 0 based on Foata normal form. 8/271 useless extension candidates. Maximal degree in co-relation 2891. Up to 149 conditions per place. [2020-10-16 00:00:27,761 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 36 selfloop transitions, 88 changer transitions 0/131 dead transitions. [2020-10-16 00:00:27,761 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 131 transitions, 2989 flow [2020-10-16 00:00:27,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 00:00:27,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 00:00:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1283 transitions. [2020-10-16 00:00:27,763 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752631578947368 [2020-10-16 00:00:27,763 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1283 transitions. [2020-10-16 00:00:27,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1283 transitions. [2020-10-16 00:00:27,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:27,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1283 transitions. [2020-10-16 00:00:27,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 00:00:27,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 00:00:27,766 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 00:00:27,766 INFO L185 Difference]: Start difference. First operand has 165 places, 112 transitions, 2032 flow. Second operand 19 states and 1283 transitions. [2020-10-16 00:00:27,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 131 transitions, 2989 flow [2020-10-16 00:00:27,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 131 transitions, 2811 flow, removed 49 selfloop flow, removed 12 redundant places. [2020-10-16 00:00:27,802 INFO L241 Difference]: Finished difference. Result has 173 places, 116 transitions, 2211 flow [2020-10-16 00:00:27,802 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1888, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2211, PETRI_PLACES=173, PETRI_TRANSITIONS=116} [2020-10-16 00:00:27,802 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 155 predicate places. [2020-10-16 00:00:27,803 INFO L481 AbstractCegarLoop]: Abstraction has has 173 places, 116 transitions, 2211 flow [2020-10-16 00:00:27,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 00:00:27,803 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:27,803 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:28,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-16 00:00:28,004 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:28,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:28,005 INFO L82 PathProgramCache]: Analyzing trace with hash -301117368, now seen corresponding path program 27 times [2020-10-16 00:00:28,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:28,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311361249] [2020-10-16 00:00:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:28,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:28,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311361249] [2020-10-16 00:00:28,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962762786] [2020-10-16 00:00:28,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:28,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 00:00:28,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:28,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 00:00:28,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:28,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:28,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:28,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-16 00:00:28,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970462893] [2020-10-16 00:00:28,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-16 00:00:28,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:28,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-16 00:00:28,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-16 00:00:28,193 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:28,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 116 transitions, 2211 flow. Second operand 12 states. [2020-10-16 00:00:28,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:28,195 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:28,196 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:28,553 INFO L129 PetriNetUnfolder]: 112/285 cut-off events. [2020-10-16 00:00:28,553 INFO L130 PetriNetUnfolder]: For 12865/12871 co-relation queries the response was YES. [2020-10-16 00:00:28,556 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3343 conditions, 285 events. 112/285 cut-off events. For 12865/12871 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1236 event pairs, 0 based on Foata normal form. 5/290 useless extension candidates. Maximal degree in co-relation 3265. Up to 163 conditions per place. [2020-10-16 00:00:28,560 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 29 selfloop transitions, 104 changer transitions 0/140 dead transitions. [2020-10-16 00:00:28,560 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 140 transitions, 3429 flow [2020-10-16 00:00:28,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 00:00:28,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 00:00:28,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1352 transitions. [2020-10-16 00:00:28,563 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.676 [2020-10-16 00:00:28,563 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1352 transitions. [2020-10-16 00:00:28,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1352 transitions. [2020-10-16 00:00:28,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:28,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1352 transitions. [2020-10-16 00:00:28,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 00:00:28,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 00:00:28,568 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 00:00:28,568 INFO L185 Difference]: Start difference. First operand has 173 places, 116 transitions, 2211 flow. Second operand 20 states and 1352 transitions. [2020-10-16 00:00:28,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 140 transitions, 3429 flow [2020-10-16 00:00:28,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 140 transitions, 3165 flow, removed 58 selfloop flow, removed 16 redundant places. [2020-10-16 00:00:28,620 INFO L241 Difference]: Finished difference. Result has 180 places, 122 transitions, 2485 flow [2020-10-16 00:00:28,620 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=1995, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2485, PETRI_PLACES=180, PETRI_TRANSITIONS=122} [2020-10-16 00:00:28,620 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 162 predicate places. [2020-10-16 00:00:28,620 INFO L481 AbstractCegarLoop]: Abstraction has has 180 places, 122 transitions, 2485 flow [2020-10-16 00:00:28,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-16 00:00:28,621 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:28,621 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:28,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-16 00:00:28,829 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:28,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:28,829 INFO L82 PathProgramCache]: Analyzing trace with hash 2103231458, now seen corresponding path program 28 times [2020-10-16 00:00:28,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:28,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431848407] [2020-10-16 00:00:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:28,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431848407] [2020-10-16 00:00:28,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203993408] [2020-10-16 00:00:28,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:28,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:00:28,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:28,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 00:00:28,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:29,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:29,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:29,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:29,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 00:00:29,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517021445] [2020-10-16 00:00:29,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 00:00:29,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:29,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 00:00:29,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 00:00:29,016 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:29,016 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 122 transitions, 2485 flow. Second operand 13 states. [2020-10-16 00:00:29,016 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:29,016 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:29,016 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:29,466 INFO L129 PetriNetUnfolder]: 109/279 cut-off events. [2020-10-16 00:00:29,467 INFO L130 PetriNetUnfolder]: For 14260/14262 co-relation queries the response was YES. [2020-10-16 00:00:29,470 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3394 conditions, 279 events. 109/279 cut-off events. For 14260/14262 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1241 event pairs, 0 based on Foata normal form. 4/283 useless extension candidates. Maximal degree in co-relation 3312. Up to 159 conditions per place. [2020-10-16 00:00:29,474 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 27 selfloop transitions, 106 changer transitions 0/140 dead transitions. [2020-10-16 00:00:29,475 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 140 transitions, 3525 flow [2020-10-16 00:00:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-16 00:00:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-16 00:00:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1419 transitions. [2020-10-16 00:00:29,477 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6757142857142857 [2020-10-16 00:00:29,477 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1419 transitions. [2020-10-16 00:00:29,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1419 transitions. [2020-10-16 00:00:29,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:29,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1419 transitions. [2020-10-16 00:00:29,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 22 states. [2020-10-16 00:00:29,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 22 states. [2020-10-16 00:00:29,482 INFO L81 ComplementDD]: Finished complementDD. Result 22 states. [2020-10-16 00:00:29,482 INFO L185 Difference]: Start difference. First operand has 180 places, 122 transitions, 2485 flow. Second operand 21 states and 1419 transitions. [2020-10-16 00:00:29,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 140 transitions, 3525 flow [2020-10-16 00:00:29,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 140 transitions, 3197 flow, removed 85 selfloop flow, removed 15 redundant places. [2020-10-16 00:00:29,548 INFO L241 Difference]: Finished difference. Result has 187 places, 123 transitions, 2463 flow [2020-10-16 00:00:29,549 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2157, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2463, PETRI_PLACES=187, PETRI_TRANSITIONS=123} [2020-10-16 00:00:29,549 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 169 predicate places. [2020-10-16 00:00:29,549 INFO L481 AbstractCegarLoop]: Abstraction has has 187 places, 123 transitions, 2463 flow [2020-10-16 00:00:29,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 00:00:29,550 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:29,550 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:29,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:29,765 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:29,766 INFO L82 PathProgramCache]: Analyzing trace with hash -547648186, now seen corresponding path program 29 times [2020-10-16 00:00:29,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:29,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542169912] [2020-10-16 00:00:29,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:29,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542169912] [2020-10-16 00:00:29,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844884411] [2020-10-16 00:00:29,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:29,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-16 00:00:29,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:29,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 00:00:29,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:29,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:00:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:29,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:29,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-16 00:00:29,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032432034] [2020-10-16 00:00:29,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 00:00:29,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:29,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 00:00:29,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-16 00:00:29,946 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:29,947 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 123 transitions, 2463 flow. Second operand 13 states. [2020-10-16 00:00:29,947 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:29,948 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:29,948 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:30,405 INFO L129 PetriNetUnfolder]: 112/284 cut-off events. [2020-10-16 00:00:30,405 INFO L130 PetriNetUnfolder]: For 15335/15337 co-relation queries the response was YES. [2020-10-16 00:00:30,409 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3505 conditions, 284 events. 112/284 cut-off events. For 15335/15337 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1256 event pairs, 0 based on Foata normal form. 3/287 useless extension candidates. Maximal degree in co-relation 3421. Up to 161 conditions per place. [2020-10-16 00:00:30,414 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 49 selfloop transitions, 86 changer transitions 0/142 dead transitions. [2020-10-16 00:00:30,415 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 142 transitions, 3559 flow [2020-10-16 00:00:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 00:00:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 00:00:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1351 transitions. [2020-10-16 00:00:30,423 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755 [2020-10-16 00:00:30,424 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1351 transitions. [2020-10-16 00:00:30,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1351 transitions. [2020-10-16 00:00:30,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:30,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1351 transitions. [2020-10-16 00:00:30,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 00:00:30,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 00:00:30,435 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 00:00:30,435 INFO L185 Difference]: Start difference. First operand has 187 places, 123 transitions, 2463 flow. Second operand 20 states and 1351 transitions. [2020-10-16 00:00:30,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 142 transitions, 3559 flow [2020-10-16 00:00:30,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 142 transitions, 3275 flow, removed 50 selfloop flow, removed 18 redundant places. [2020-10-16 00:00:30,505 INFO L241 Difference]: Finished difference. Result has 190 places, 126 transitions, 2559 flow [2020-10-16 00:00:30,506 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2235, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2559, PETRI_PLACES=190, PETRI_TRANSITIONS=126} [2020-10-16 00:00:30,506 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 172 predicate places. [2020-10-16 00:00:30,506 INFO L481 AbstractCegarLoop]: Abstraction has has 190 places, 126 transitions, 2559 flow [2020-10-16 00:00:30,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 00:00:30,507 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:30,507 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:30,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:30,721 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:30,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:30,721 INFO L82 PathProgramCache]: Analyzing trace with hash -744168569, now seen corresponding path program 30 times [2020-10-16 00:00:30,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:30,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695836502] [2020-10-16 00:00:30,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:30,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695836502] [2020-10-16 00:00:30,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933438779] [2020-10-16 00:00:30,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:30,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 00:00:30,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:30,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 00:00:30,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:30,882 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:00:30,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:30,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:30,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 00:00:30,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236285648] [2020-10-16 00:00:30,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 00:00:30,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:30,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 00:00:30,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-16 00:00:30,897 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:30,898 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 126 transitions, 2559 flow. Second operand 14 states. [2020-10-16 00:00:30,898 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:30,898 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:30,898 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:31,383 INFO L129 PetriNetUnfolder]: 115/291 cut-off events. [2020-10-16 00:00:31,383 INFO L130 PetriNetUnfolder]: For 14738/14740 co-relation queries the response was YES. [2020-10-16 00:00:31,385 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3553 conditions, 291 events. 115/291 cut-off events. For 14738/14740 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1295 event pairs, 0 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 3467. Up to 165 conditions per place. [2020-10-16 00:00:31,389 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 30 selfloop transitions, 110 changer transitions 0/147 dead transitions. [2020-10-16 00:00:31,389 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 147 transitions, 3731 flow [2020-10-16 00:00:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 00:00:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 00:00:31,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1351 transitions. [2020-10-16 00:00:31,392 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6755 [2020-10-16 00:00:31,392 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1351 transitions. [2020-10-16 00:00:31,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1351 transitions. [2020-10-16 00:00:31,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:31,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1351 transitions. [2020-10-16 00:00:31,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 00:00:31,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 00:00:31,397 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 00:00:31,397 INFO L185 Difference]: Start difference. First operand has 190 places, 126 transitions, 2559 flow. Second operand 20 states and 1351 transitions. [2020-10-16 00:00:31,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 147 transitions, 3731 flow [2020-10-16 00:00:31,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 147 transitions, 3515 flow, removed 37 selfloop flow, removed 17 redundant places. [2020-10-16 00:00:31,443 INFO L241 Difference]: Finished difference. Result has 194 places, 129 transitions, 2727 flow [2020-10-16 00:00:31,444 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2727, PETRI_PLACES=194, PETRI_TRANSITIONS=129} [2020-10-16 00:00:31,444 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 176 predicate places. [2020-10-16 00:00:31,444 INFO L481 AbstractCegarLoop]: Abstraction has has 194 places, 129 transitions, 2727 flow [2020-10-16 00:00:31,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 00:00:31,444 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:31,444 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:31,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-16 00:00:31,645 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:31,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:31,646 INFO L82 PathProgramCache]: Analyzing trace with hash -476608046, now seen corresponding path program 31 times [2020-10-16 00:00:31,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:31,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758160889] [2020-10-16 00:00:31,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:31,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758160889] [2020-10-16 00:00:31,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755577774] [2020-10-16 00:00:31,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:31,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 00:00:31,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:31,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:31,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:31,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-16 00:00:31,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933545281] [2020-10-16 00:00:31,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 00:00:31,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:31,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 00:00:31,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-16 00:00:31,814 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:31,814 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 129 transitions, 2727 flow. Second operand 13 states. [2020-10-16 00:00:31,814 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:31,814 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:31,815 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:32,057 INFO L129 PetriNetUnfolder]: 117/298 cut-off events. [2020-10-16 00:00:32,057 INFO L130 PetriNetUnfolder]: For 16631/16633 co-relation queries the response was YES. [2020-10-16 00:00:32,059 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3744 conditions, 298 events. 117/298 cut-off events. For 16631/16633 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1329 event pairs, 0 based on Foata normal form. 4/302 useless extension candidates. Maximal degree in co-relation 3656. Up to 184 conditions per place. [2020-10-16 00:00:32,064 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 114 selfloop transitions, 21 changer transitions 0/142 dead transitions. [2020-10-16 00:00:32,064 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 142 transitions, 3587 flow [2020-10-16 00:00:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-16 00:00:32,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-16 00:00:32,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 942 transitions. [2020-10-16 00:00:32,067 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6728571428571428 [2020-10-16 00:00:32,067 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 942 transitions. [2020-10-16 00:00:32,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 942 transitions. [2020-10-16 00:00:32,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:32,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 942 transitions. [2020-10-16 00:00:32,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 15 states. [2020-10-16 00:00:32,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 15 states. [2020-10-16 00:00:32,071 INFO L81 ComplementDD]: Finished complementDD. Result 15 states. [2020-10-16 00:00:32,071 INFO L185 Difference]: Start difference. First operand has 194 places, 129 transitions, 2727 flow. Second operand 14 states and 942 transitions. [2020-10-16 00:00:32,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 142 transitions, 3587 flow [2020-10-16 00:00:32,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 142 transitions, 3315 flow, removed 42 selfloop flow, removed 17 redundant places. [2020-10-16 00:00:32,141 INFO L241 Difference]: Finished difference. Result has 192 places, 131 transitions, 2599 flow [2020-10-16 00:00:32,141 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2599, PETRI_PLACES=192, PETRI_TRANSITIONS=131} [2020-10-16 00:00:32,141 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 174 predicate places. [2020-10-16 00:00:32,141 INFO L481 AbstractCegarLoop]: Abstraction has has 192 places, 131 transitions, 2599 flow [2020-10-16 00:00:32,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 00:00:32,142 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:32,142 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:32,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:32,356 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:32,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:32,356 INFO L82 PathProgramCache]: Analyzing trace with hash -219980600, now seen corresponding path program 32 times [2020-10-16 00:00:32,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:32,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221387129] [2020-10-16 00:00:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:32,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221387129] [2020-10-16 00:00:32,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593539620] [2020-10-16 00:00:32,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:32,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:00:32,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:32,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 00:00:32,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:32,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:32,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:32,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 00:00:32,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504329471] [2020-10-16 00:00:32,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 00:00:32,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:32,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 00:00:32,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-16 00:00:32,551 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:32,551 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 131 transitions, 2599 flow. Second operand 14 states. [2020-10-16 00:00:32,551 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:32,551 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:32,552 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:32,910 INFO L129 PetriNetUnfolder]: 129/332 cut-off events. [2020-10-16 00:00:32,910 INFO L130 PetriNetUnfolder]: For 20515/20521 co-relation queries the response was YES. [2020-10-16 00:00:32,914 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4209 conditions, 332 events. 129/332 cut-off events. For 20515/20521 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1561 event pairs, 0 based on Foata normal form. 8/340 useless extension candidates. Maximal degree in co-relation 4119. Up to 191 conditions per place. [2020-10-16 00:00:32,927 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 95 selfloop transitions, 54 changer transitions 0/156 dead transitions. [2020-10-16 00:00:32,927 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 156 transitions, 3849 flow [2020-10-16 00:00:32,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 00:00:32,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-16 00:00:32,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1146 transitions. [2020-10-16 00:00:32,929 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6741176470588235 [2020-10-16 00:00:32,930 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1146 transitions. [2020-10-16 00:00:32,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1146 transitions. [2020-10-16 00:00:32,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:32,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1146 transitions. [2020-10-16 00:00:32,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-16 00:00:32,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-16 00:00:32,936 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-16 00:00:32,936 INFO L185 Difference]: Start difference. First operand has 192 places, 131 transitions, 2599 flow. Second operand 17 states and 1146 transitions. [2020-10-16 00:00:32,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 156 transitions, 3849 flow [2020-10-16 00:00:33,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 156 transitions, 3721 flow, removed 45 selfloop flow, removed 11 redundant places. [2020-10-16 00:00:33,021 INFO L241 Difference]: Finished difference. Result has 203 places, 143 transitions, 3011 flow [2020-10-16 00:00:33,028 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3011, PETRI_PLACES=203, PETRI_TRANSITIONS=143} [2020-10-16 00:00:33,028 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 185 predicate places. [2020-10-16 00:00:33,028 INFO L481 AbstractCegarLoop]: Abstraction has has 203 places, 143 transitions, 3011 flow [2020-10-16 00:00:33,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 00:00:33,028 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:33,028 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:33,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-16 00:00:33,229 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:33,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:33,230 INFO L82 PathProgramCache]: Analyzing trace with hash 202792686, now seen corresponding path program 33 times [2020-10-16 00:00:33,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:33,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179741638] [2020-10-16 00:00:33,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:33,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:33,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179741638] [2020-10-16 00:00:33,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394277760] [2020-10-16 00:00:33,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:33,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 00:00:33,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:33,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-16 00:00:33,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:33,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:33,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:33,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-16 00:00:33,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115443316] [2020-10-16 00:00:33,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 00:00:33,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:33,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 00:00:33,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-16 00:00:33,429 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:33,430 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 143 transitions, 3011 flow. Second operand 14 states. [2020-10-16 00:00:33,430 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:33,430 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:33,430 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:33,954 INFO L129 PetriNetUnfolder]: 133/342 cut-off events. [2020-10-16 00:00:33,954 INFO L130 PetriNetUnfolder]: For 22559/22565 co-relation queries the response was YES. [2020-10-16 00:00:33,958 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4482 conditions, 342 events. 133/342 cut-off events. For 22559/22565 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1607 event pairs, 0 based on Foata normal form. 8/350 useless extension candidates. Maximal degree in co-relation 4386. Up to 197 conditions per place. [2020-10-16 00:00:33,963 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 47 selfloop transitions, 112 changer transitions 0/166 dead transitions. [2020-10-16 00:00:33,963 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 166 transitions, 4419 flow [2020-10-16 00:00:33,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 00:00:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 00:00:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1554 transitions. [2020-10-16 00:00:33,965 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6756521739130434 [2020-10-16 00:00:33,966 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1554 transitions. [2020-10-16 00:00:33,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1554 transitions. [2020-10-16 00:00:33,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:33,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1554 transitions. [2020-10-16 00:00:33,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 00:00:33,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 00:00:33,970 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 00:00:33,970 INFO L185 Difference]: Start difference. First operand has 203 places, 143 transitions, 3011 flow. Second operand 23 states and 1554 transitions. [2020-10-16 00:00:33,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 166 transitions, 4419 flow [2020-10-16 00:00:34,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 166 transitions, 4237 flow, removed 64 selfloop flow, removed 10 redundant places. [2020-10-16 00:00:34,102 INFO L241 Difference]: Finished difference. Result has 218 places, 147 transitions, 3320 flow [2020-10-16 00:00:34,102 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2873, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3320, PETRI_PLACES=218, PETRI_TRANSITIONS=147} [2020-10-16 00:00:34,103 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 200 predicate places. [2020-10-16 00:00:34,103 INFO L481 AbstractCegarLoop]: Abstraction has has 218 places, 147 transitions, 3320 flow [2020-10-16 00:00:34,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 00:00:34,103 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:34,103 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:34,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:34,316 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:34,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:34,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1115003167, now seen corresponding path program 34 times [2020-10-16 00:00:34,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:34,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325166657] [2020-10-16 00:00:34,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:34,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:34,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325166657] [2020-10-16 00:00:34,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223563986] [2020-10-16 00:00:34,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:34,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:00:34,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:34,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 00:00:34,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:34,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:34,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 00:00:34,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947507951] [2020-10-16 00:00:34,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 00:00:34,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:34,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 00:00:34,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 00:00:34,502 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:34,502 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 147 transitions, 3320 flow. Second operand 14 states. [2020-10-16 00:00:34,502 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:34,502 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:34,503 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:34,789 INFO L129 PetriNetUnfolder]: 135/349 cut-off events. [2020-10-16 00:00:34,789 INFO L130 PetriNetUnfolder]: For 23865/23871 co-relation queries the response was YES. [2020-10-16 00:00:34,793 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4715 conditions, 349 events. 135/349 cut-off events. For 23865/23871 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1647 event pairs, 0 based on Foata normal form. 5/354 useless extension candidates. Maximal degree in co-relation 4616. Up to 201 conditions per place. [2020-10-16 00:00:34,796 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 111 selfloop transitions, 44 changer transitions 0/162 dead transitions. [2020-10-16 00:00:34,796 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 162 transitions, 4362 flow [2020-10-16 00:00:34,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 00:00:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 00:00:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1077 transitions. [2020-10-16 00:00:34,798 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.673125 [2020-10-16 00:00:34,798 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1077 transitions. [2020-10-16 00:00:34,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1077 transitions. [2020-10-16 00:00:34,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:34,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1077 transitions. [2020-10-16 00:00:34,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 00:00:34,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 00:00:34,802 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 00:00:34,802 INFO L185 Difference]: Start difference. First operand has 218 places, 147 transitions, 3320 flow. Second operand 16 states and 1077 transitions. [2020-10-16 00:00:34,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 162 transitions, 4362 flow [2020-10-16 00:00:34,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 162 transitions, 4045 flow, removed 71 selfloop flow, removed 18 redundant places. [2020-10-16 00:00:34,873 INFO L241 Difference]: Finished difference. Result has 217 places, 149 transitions, 3217 flow [2020-10-16 00:00:34,873 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3017, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3217, PETRI_PLACES=217, PETRI_TRANSITIONS=149} [2020-10-16 00:00:34,873 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 199 predicate places. [2020-10-16 00:00:34,873 INFO L481 AbstractCegarLoop]: Abstraction has has 217 places, 149 transitions, 3217 flow [2020-10-16 00:00:34,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 00:00:34,873 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:34,874 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:35,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-16 00:00:35,074 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:35,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:35,075 INFO L82 PathProgramCache]: Analyzing trace with hash -2146415779, now seen corresponding path program 35 times [2020-10-16 00:00:35,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:35,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454380230] [2020-10-16 00:00:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:35,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454380230] [2020-10-16 00:00:35,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311055137] [2020-10-16 00:00:35,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:35,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-16 00:00:35,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:35,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 00:00:35,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:35,260 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:35,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:35,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 00:00:35,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666316797] [2020-10-16 00:00:35,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 00:00:35,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:35,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 00:00:35,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-16 00:00:35,294 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:35,294 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 149 transitions, 3217 flow. Second operand 15 states. [2020-10-16 00:00:35,294 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:35,295 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:35,295 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:35,745 INFO L129 PetriNetUnfolder]: 141/366 cut-off events. [2020-10-16 00:00:35,745 INFO L130 PetriNetUnfolder]: For 26136/26138 co-relation queries the response was YES. [2020-10-16 00:00:35,749 INFO L80 FinitePrefix]: Finished finitePrefix Result has 4938 conditions, 366 events. 141/366 cut-off events. For 26136/26138 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1769 event pairs, 0 based on Foata normal form. 4/370 useless extension candidates. Maximal degree in co-relation 4837. Up to 213 conditions per place. [2020-10-16 00:00:35,752 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 71 selfloop transitions, 92 changer transitions 0/170 dead transitions. [2020-10-16 00:00:35,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 170 transitions, 4473 flow [2020-10-16 00:00:35,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 00:00:35,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 00:00:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1281 transitions. [2020-10-16 00:00:35,754 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6742105263157895 [2020-10-16 00:00:35,754 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1281 transitions. [2020-10-16 00:00:35,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1281 transitions. [2020-10-16 00:00:35,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:35,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1281 transitions. [2020-10-16 00:00:35,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 00:00:35,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 00:00:35,758 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 00:00:35,758 INFO L185 Difference]: Start difference. First operand has 217 places, 149 transitions, 3217 flow. Second operand 19 states and 1281 transitions. [2020-10-16 00:00:35,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 170 transitions, 4473 flow [2020-10-16 00:00:35,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 170 transitions, 4277 flow, removed 58 selfloop flow, removed 13 redundant places. [2020-10-16 00:00:35,829 INFO L241 Difference]: Finished difference. Result has 228 places, 155 transitions, 3514 flow [2020-10-16 00:00:35,829 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3055, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3514, PETRI_PLACES=228, PETRI_TRANSITIONS=155} [2020-10-16 00:00:35,829 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 210 predicate places. [2020-10-16 00:00:35,829 INFO L481 AbstractCegarLoop]: Abstraction has has 228 places, 155 transitions, 3514 flow [2020-10-16 00:00:35,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 00:00:35,830 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:35,830 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:36,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-16 00:00:36,031 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:36,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:36,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1610965881, now seen corresponding path program 36 times [2020-10-16 00:00:36,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:36,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472640797] [2020-10-16 00:00:36,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:36,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:36,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472640797] [2020-10-16 00:00:36,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863109496] [2020-10-16 00:00:36,129 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:36,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-16 00:00:36,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:36,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 00:00:36,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:36,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:36,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 00:00:36,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981743804] [2020-10-16 00:00:36,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 00:00:36,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:36,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 00:00:36,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-16 00:00:36,197 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:36,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 155 transitions, 3514 flow. Second operand 14 states. [2020-10-16 00:00:36,197 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:36,197 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:36,198 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:36,656 INFO L129 PetriNetUnfolder]: 145/378 cut-off events. [2020-10-16 00:00:36,656 INFO L130 PetriNetUnfolder]: For 27306/27308 co-relation queries the response was YES. [2020-10-16 00:00:36,660 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5178 conditions, 378 events. 145/378 cut-off events. For 27306/27308 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1828 event pairs, 0 based on Foata normal form. 2/380 useless extension candidates. Maximal degree in co-relation 5071. Up to 221 conditions per place. [2020-10-16 00:00:36,665 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 41 selfloop transitions, 130 changer transitions 0/178 dead transitions. [2020-10-16 00:00:36,665 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 178 transitions, 4938 flow [2020-10-16 00:00:36,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 00:00:36,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-16 00:00:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1485 transitions. [2020-10-16 00:00:36,668 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.675 [2020-10-16 00:00:36,668 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1485 transitions. [2020-10-16 00:00:36,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1485 transitions. [2020-10-16 00:00:36,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:36,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1485 transitions. [2020-10-16 00:00:36,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 23 states. [2020-10-16 00:00:36,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 23 states. [2020-10-16 00:00:36,673 INFO L81 ComplementDD]: Finished complementDD. Result 23 states. [2020-10-16 00:00:36,673 INFO L185 Difference]: Start difference. First operand has 228 places, 155 transitions, 3514 flow. Second operand 22 states and 1485 transitions. [2020-10-16 00:00:36,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 178 transitions, 4938 flow [2020-10-16 00:00:36,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 178 transitions, 4709 flow, removed 63 selfloop flow, removed 12 redundant places. [2020-10-16 00:00:36,759 INFO L241 Difference]: Finished difference. Result has 239 places, 159 transitions, 3758 flow [2020-10-16 00:00:36,760 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3327, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3758, PETRI_PLACES=239, PETRI_TRANSITIONS=159} [2020-10-16 00:00:36,760 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 221 predicate places. [2020-10-16 00:00:36,760 INFO L481 AbstractCegarLoop]: Abstraction has has 239 places, 159 transitions, 3758 flow [2020-10-16 00:00:36,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 00:00:36,760 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:36,760 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:36,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-16 00:00:36,961 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:36,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1594878741, now seen corresponding path program 37 times [2020-10-16 00:00:36,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:36,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687838620] [2020-10-16 00:00:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:37,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687838620] [2020-10-16 00:00:37,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045246004] [2020-10-16 00:00:37,066 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:37,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 00:00:37,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:37,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:37,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:37,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 00:00:37,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413166609] [2020-10-16 00:00:37,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 00:00:37,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:37,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 00:00:37,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-16 00:00:37,142 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:37,142 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 159 transitions, 3758 flow. Second operand 15 states. [2020-10-16 00:00:37,143 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:37,143 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:37,143 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:37,726 INFO L129 PetriNetUnfolder]: 149/391 cut-off events. [2020-10-16 00:00:37,726 INFO L130 PetriNetUnfolder]: For 27860/27862 co-relation queries the response was YES. [2020-10-16 00:00:37,730 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5417 conditions, 391 events. 149/391 cut-off events. For 27860/27862 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1935 event pairs, 0 based on Foata normal form. 4/395 useless extension candidates. Maximal degree in co-relation 5308. Up to 229 conditions per place. [2020-10-16 00:00:37,760 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 39 selfloop transitions, 136 changer transitions 0/182 dead transitions. [2020-10-16 00:00:37,765 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 182 transitions, 5194 flow [2020-10-16 00:00:37,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 00:00:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 00:00:37,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1553 transitions. [2020-10-16 00:00:37,768 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6752173913043479 [2020-10-16 00:00:37,768 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1553 transitions. [2020-10-16 00:00:37,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1553 transitions. [2020-10-16 00:00:37,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:37,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1553 transitions. [2020-10-16 00:00:37,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 00:00:37,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 00:00:37,777 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 00:00:37,777 INFO L185 Difference]: Start difference. First operand has 239 places, 159 transitions, 3758 flow. Second operand 23 states and 1553 transitions. [2020-10-16 00:00:37,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 182 transitions, 5194 flow [2020-10-16 00:00:37,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 182 transitions, 4841 flow, removed 61 selfloop flow, removed 19 redundant places. [2020-10-16 00:00:37,879 INFO L241 Difference]: Finished difference. Result has 244 places, 163 transitions, 3902 flow [2020-10-16 00:00:37,879 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3447, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3902, PETRI_PLACES=244, PETRI_TRANSITIONS=163} [2020-10-16 00:00:37,879 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 226 predicate places. [2020-10-16 00:00:37,879 INFO L481 AbstractCegarLoop]: Abstraction has has 244 places, 163 transitions, 3902 flow [2020-10-16 00:00:37,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 00:00:37,880 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:37,880 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:38,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-16 00:00:38,081 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:38,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:38,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1594388631, now seen corresponding path program 38 times [2020-10-16 00:00:38,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:38,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145484814] [2020-10-16 00:00:38,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:38,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145484814] [2020-10-16 00:00:38,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992878746] [2020-10-16 00:00:38,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:38,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 00:00:38,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:38,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 00:00:38,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:38,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:38,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-16 00:00:38,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526144135] [2020-10-16 00:00:38,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-16 00:00:38,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:38,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-16 00:00:38,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-16 00:00:38,280 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:38,281 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 163 transitions, 3902 flow. Second operand 14 states. [2020-10-16 00:00:38,281 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:38,281 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:38,281 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:38,787 INFO L129 PetriNetUnfolder]: 160/417 cut-off events. [2020-10-16 00:00:38,787 INFO L130 PetriNetUnfolder]: For 30206/30212 co-relation queries the response was YES. [2020-10-16 00:00:38,794 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5916 conditions, 417 events. 160/417 cut-off events. For 30206/30212 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2062 event pairs, 0 based on Foata normal form. 5/422 useless extension candidates. Maximal degree in co-relation 5805. Up to 247 conditions per place. [2020-10-16 00:00:38,800 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 35 selfloop transitions, 151 changer transitions 0/193 dead transitions. [2020-10-16 00:00:38,800 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 193 transitions, 5706 flow [2020-10-16 00:00:38,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 00:00:38,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 00:00:38,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1622 transitions. [2020-10-16 00:00:38,803 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6758333333333333 [2020-10-16 00:00:38,803 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1622 transitions. [2020-10-16 00:00:38,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1622 transitions. [2020-10-16 00:00:38,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:38,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1622 transitions. [2020-10-16 00:00:38,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 00:00:38,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 00:00:38,809 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 00:00:38,809 INFO L185 Difference]: Start difference. First operand has 244 places, 163 transitions, 3902 flow. Second operand 24 states and 1622 transitions. [2020-10-16 00:00:38,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 193 transitions, 5706 flow [2020-10-16 00:00:38,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 193 transitions, 5327 flow, removed 72 selfloop flow, removed 20 redundant places. [2020-10-16 00:00:38,989 INFO L241 Difference]: Finished difference. Result has 251 places, 171 transitions, 4272 flow [2020-10-16 00:00:38,990 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3583, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4272, PETRI_PLACES=251, PETRI_TRANSITIONS=171} [2020-10-16 00:00:38,990 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 233 predicate places. [2020-10-16 00:00:38,990 INFO L481 AbstractCegarLoop]: Abstraction has has 251 places, 171 transitions, 4272 flow [2020-10-16 00:00:38,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-16 00:00:38,990 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:38,990 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:39,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-16 00:00:39,200 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:39,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:39,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1723642493, now seen corresponding path program 39 times [2020-10-16 00:00:39,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:39,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542668365] [2020-10-16 00:00:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:39,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542668365] [2020-10-16 00:00:39,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332327875] [2020-10-16 00:00:39,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:39,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-16 00:00:39,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:39,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 00:00:39,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:39,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-16 00:00:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:39,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:39,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 00:00:39,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402200351] [2020-10-16 00:00:39,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 00:00:39,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:39,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 00:00:39,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 00:00:39,390 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:39,390 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 171 transitions, 4272 flow. Second operand 15 states. [2020-10-16 00:00:39,390 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:39,390 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:39,390 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:40,036 INFO L129 PetriNetUnfolder]: 157/410 cut-off events. [2020-10-16 00:00:40,037 INFO L130 PetriNetUnfolder]: For 33246/33248 co-relation queries the response was YES. [2020-10-16 00:00:40,041 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6005 conditions, 410 events. 157/410 cut-off events. For 33246/33248 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2059 event pairs, 0 based on Foata normal form. 4/414 useless extension candidates. Maximal degree in co-relation 5890. Up to 243 conditions per place. [2020-10-16 00:00:40,046 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 32 selfloop transitions, 154 changer transitions 0/193 dead transitions. [2020-10-16 00:00:40,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 193 transitions, 5810 flow [2020-10-16 00:00:40,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 00:00:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-16 00:00:40,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1689 transitions. [2020-10-16 00:00:40,055 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6756 [2020-10-16 00:00:40,055 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1689 transitions. [2020-10-16 00:00:40,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1689 transitions. [2020-10-16 00:00:40,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:40,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1689 transitions. [2020-10-16 00:00:40,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 26 states. [2020-10-16 00:00:40,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 26 states. [2020-10-16 00:00:40,059 INFO L81 ComplementDD]: Finished complementDD. Result 26 states. [2020-10-16 00:00:40,059 INFO L185 Difference]: Start difference. First operand has 251 places, 171 transitions, 4272 flow. Second operand 25 states and 1689 transitions. [2020-10-16 00:00:40,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 193 transitions, 5810 flow [2020-10-16 00:00:40,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 193 transitions, 5341 flow, removed 115 selfloop flow, removed 18 redundant places. [2020-10-16 00:00:40,224 INFO L241 Difference]: Finished difference. Result has 259 places, 172 transitions, 4224 flow [2020-10-16 00:00:40,224 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3803, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4224, PETRI_PLACES=259, PETRI_TRANSITIONS=172} [2020-10-16 00:00:40,224 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 241 predicate places. [2020-10-16 00:00:40,224 INFO L481 AbstractCegarLoop]: Abstraction has has 259 places, 172 transitions, 4224 flow [2020-10-16 00:00:40,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 00:00:40,224 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:40,225 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:40,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-16 00:00:40,426 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:40,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:40,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1991622277, now seen corresponding path program 40 times [2020-10-16 00:00:40,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:40,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105177476] [2020-10-16 00:00:40,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:40,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105177476] [2020-10-16 00:00:40,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534248753] [2020-10-16 00:00:40,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:40,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 00:00:40,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:40,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 00:00:40,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:40,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-16 00:00:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:40,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 00:00:40,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-16 00:00:40,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637997415] [2020-10-16 00:00:40,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 00:00:40,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:40,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 00:00:40,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-16 00:00:40,619 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 100 [2020-10-16 00:00:40,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 172 transitions, 4224 flow. Second operand 15 states. [2020-10-16 00:00:40,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:40,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 100 [2020-10-16 00:00:40,620 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:41,206 INFO L129 PetriNetUnfolder]: 160/415 cut-off events. [2020-10-16 00:00:41,207 INFO L130 PetriNetUnfolder]: For 35098/35100 co-relation queries the response was YES. [2020-10-16 00:00:41,211 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6116 conditions, 415 events. 160/415 cut-off events. For 35098/35100 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2076 event pairs, 0 based on Foata normal form. 3/418 useless extension candidates. Maximal degree in co-relation 5999. Up to 243 conditions per place. [2020-10-16 00:00:41,217 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 63 selfloop transitions, 126 changer transitions 0/196 dead transitions. [2020-10-16 00:00:41,217 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 196 transitions, 5838 flow [2020-10-16 00:00:41,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-16 00:00:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-16 00:00:41,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1621 transitions. [2020-10-16 00:00:41,221 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6754166666666667 [2020-10-16 00:00:41,221 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1621 transitions. [2020-10-16 00:00:41,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1621 transitions. [2020-10-16 00:00:41,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:41,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1621 transitions. [2020-10-16 00:00:41,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 25 states. [2020-10-16 00:00:41,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 25 states. [2020-10-16 00:00:41,225 INFO L81 ComplementDD]: Finished complementDD. Result 25 states. [2020-10-16 00:00:41,225 INFO L185 Difference]: Start difference. First operand has 259 places, 172 transitions, 4224 flow. Second operand 24 states and 1621 transitions. [2020-10-16 00:00:41,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 196 transitions, 5838 flow [2020-10-16 00:00:41,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 196 transitions, 5432 flow, removed 61 selfloop flow, removed 23 redundant places. [2020-10-16 00:00:41,356 INFO L241 Difference]: Finished difference. Result has 261 places, 175 transitions, 4320 flow [2020-10-16 00:00:41,356 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4320, PETRI_PLACES=261, PETRI_TRANSITIONS=175} [2020-10-16 00:00:41,356 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 243 predicate places. [2020-10-16 00:00:41,356 INFO L481 AbstractCegarLoop]: Abstraction has has 261 places, 175 transitions, 4320 flow [2020-10-16 00:00:41,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 00:00:41,356 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:41,356 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:41,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-16 00:00:41,557 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:41,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:41,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1893293424, now seen corresponding path program 41 times [2020-10-16 00:00:41,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:41,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589217768] [2020-10-16 00:00:41,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:41,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589217768] [2020-10-16 00:00:41,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406483392] [2020-10-16 00:00:41,631 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:41,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 00:00:41,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:41,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 00:00:41,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:41,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 00:00:41,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 10 [2020-10-16 00:00:41,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712579073] [2020-10-16 00:00:41,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 00:00:41,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:41,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 00:00:41,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-10-16 00:00:41,702 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 100 [2020-10-16 00:00:41,702 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 175 transitions, 4320 flow. Second operand 8 states. [2020-10-16 00:00:41,702 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:41,702 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 100 [2020-10-16 00:00:41,703 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:42,045 INFO L129 PetriNetUnfolder]: 384/949 cut-off events. [2020-10-16 00:00:42,045 INFO L130 PetriNetUnfolder]: For 84986/85066 co-relation queries the response was YES. [2020-10-16 00:00:42,064 INFO L80 FinitePrefix]: Finished finitePrefix Result has 12408 conditions, 949 events. 384/949 cut-off events. For 84986/85066 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6283 event pairs, 8 based on Foata normal form. 192/1141 useless extension candidates. Maximal degree in co-relation 12289. Up to 498 conditions per place. [2020-10-16 00:00:42,073 INFO L132 encePairwiseOnDemand]: 97/100 looper letters, 2 selfloop transitions, 75 changer transitions 98/235 dead transitions. [2020-10-16 00:00:42,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 235 transitions, 6156 flow [2020-10-16 00:00:42,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 00:00:42,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 00:00:42,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 646 transitions. [2020-10-16 00:00:42,075 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8075 [2020-10-16 00:00:42,075 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 646 transitions. [2020-10-16 00:00:42,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 646 transitions. [2020-10-16 00:00:42,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:42,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 646 transitions. [2020-10-16 00:00:42,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 00:00:42,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 00:00:42,077 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 00:00:42,077 INFO L185 Difference]: Start difference. First operand has 261 places, 175 transitions, 4320 flow. Second operand 8 states and 646 transitions. [2020-10-16 00:00:42,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 235 transitions, 6156 flow [2020-10-16 00:00:42,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 235 transitions, 5683 flow, removed 74 selfloop flow, removed 26 redundant places. [2020-10-16 00:00:42,468 INFO L241 Difference]: Finished difference. Result has 242 places, 137 transitions, 3449 flow [2020-10-16 00:00:42,468 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=3659, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3449, PETRI_PLACES=242, PETRI_TRANSITIONS=137} [2020-10-16 00:00:42,469 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 224 predicate places. [2020-10-16 00:00:42,469 INFO L481 AbstractCegarLoop]: Abstraction has has 242 places, 137 transitions, 3449 flow [2020-10-16 00:00:42,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 00:00:42,469 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 00:00:42,469 INFO L255 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 00:00:42,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:42,683 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 00:00:42,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 00:00:42,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1541184401, now seen corresponding path program 42 times [2020-10-16 00:00:42,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 00:00:42,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796276046] [2020-10-16 00:00:42,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 00:00:42,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 00:00:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:42,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796276046] [2020-10-16 00:00:42,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927648757] [2020-10-16 00:00:42,861 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 00:00:42,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 00:00:42,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 00:00:42,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-16 00:00:42,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 00:00:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 00:00:43,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 00:00:43,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 21 [2020-10-16 00:00:43,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342737020] [2020-10-16 00:00:43,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 00:00:43,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 00:00:43,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 00:00:43,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-16 00:00:43,040 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 100 [2020-10-16 00:00:43,040 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 137 transitions, 3449 flow. Second operand 8 states. [2020-10-16 00:00:43,040 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 00:00:43,040 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 100 [2020-10-16 00:00:43,041 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 00:00:43,627 INFO L129 PetriNetUnfolder]: 674/1424 cut-off events. [2020-10-16 00:00:43,627 INFO L130 PetriNetUnfolder]: For 107291/107405 co-relation queries the response was YES. [2020-10-16 00:00:43,669 INFO L80 FinitePrefix]: Finished finitePrefix Result has 17471 conditions, 1424 events. 674/1424 cut-off events. For 107291/107405 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 9457 event pairs, 20 based on Foata normal form. 291/1715 useless extension candidates. Maximal degree in co-relation 17359. Up to 702 conditions per place. [2020-10-16 00:00:43,673 INFO L132 encePairwiseOnDemand]: 97/100 looper letters, 0 selfloop transitions, 0 changer transitions 172/172 dead transitions. [2020-10-16 00:00:43,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 172 transitions, 4374 flow [2020-10-16 00:00:43,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-16 00:00:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-16 00:00:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 646 transitions. [2020-10-16 00:00:43,675 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8075 [2020-10-16 00:00:43,676 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 646 transitions. [2020-10-16 00:00:43,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 646 transitions. [2020-10-16 00:00:43,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 00:00:43,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 646 transitions. [2020-10-16 00:00:43,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 9 states. [2020-10-16 00:00:43,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 9 states. [2020-10-16 00:00:43,678 INFO L81 ComplementDD]: Finished complementDD. Result 9 states. [2020-10-16 00:00:43,678 INFO L185 Difference]: Start difference. First operand has 242 places, 137 transitions, 3449 flow. Second operand 8 states and 646 transitions. [2020-10-16 00:00:43,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 172 transitions, 4374 flow [2020-10-16 00:00:44,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 172 transitions, 2831 flow, removed 242 selfloop flow, removed 84 redundant places. [2020-10-16 00:00:44,039 INFO L241 Difference]: Finished difference. Result has 162 places, 0 transitions, 0 flow [2020-10-16 00:00:44,039 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=2002, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=162, PETRI_TRANSITIONS=0} [2020-10-16 00:00:44,040 INFO L342 CegarLoopForPetriNet]: 18 programPoint places, 144 predicate places. [2020-10-16 00:00:44,040 INFO L481 AbstractCegarLoop]: Abstraction has has 162 places, 0 transitions, 0 flow [2020-10-16 00:00:44,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 00:00:44,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-16 00:00:44,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 12:00:44 BasicIcfg [2020-10-16 00:00:44,261 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 00:00:44,264 INFO L168 Benchmark]: Toolchain (without parser) took 35319.52 ms. Allocated memory was 252.2 MB in the beginning and 620.8 MB in the end (delta: 368.6 MB). Free memory was 207.7 MB in the beginning and 375.6 MB in the end (delta: -167.9 MB). Peak memory consumption was 200.7 MB. Max. memory is 14.2 GB. [2020-10-16 00:00:44,265 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 00:00:44,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 632.29 ms. Allocated memory was 252.2 MB in the beginning and 317.2 MB in the end (delta: 65.0 MB). Free memory was 207.7 MB in the beginning and 273.0 MB in the end (delta: -65.3 MB). Peak memory consumption was 30.1 MB. Max. memory is 14.2 GB. [2020-10-16 00:00:44,266 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.77 ms. Allocated memory is still 317.2 MB. Free memory was 273.0 MB in the beginning and 270.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 00:00:44,266 INFO L168 Benchmark]: Boogie Preprocessor took 28.64 ms. Allocated memory is still 317.2 MB. Free memory was 270.5 MB in the beginning and 268.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 00:00:44,266 INFO L168 Benchmark]: RCFGBuilder took 403.75 ms. Allocated memory is still 317.2 MB. Free memory was 268.0 MB in the beginning and 248.6 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. [2020-10-16 00:00:44,267 INFO L168 Benchmark]: TraceAbstraction took 34202.42 ms. Allocated memory was 317.2 MB in the beginning and 620.8 MB in the end (delta: 303.6 MB). Free memory was 248.6 MB in the beginning and 375.6 MB in the end (delta: -126.9 MB). Peak memory consumption was 176.6 MB. Max. memory is 14.2 GB. [2020-10-16 00:00:44,270 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 632.29 ms. Allocated memory was 252.2 MB in the beginning and 317.2 MB in the end (delta: 65.0 MB). Free memory was 207.7 MB in the beginning and 273.0 MB in the end (delta: -65.3 MB). Peak memory consumption was 30.1 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 46.77 ms. Allocated memory is still 317.2 MB. Free memory was 273.0 MB in the beginning and 270.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.64 ms. Allocated memory is still 317.2 MB. Free memory was 270.5 MB in the beginning and 268.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 403.75 ms. Allocated memory is still 317.2 MB. Free memory was 268.0 MB in the beginning and 248.6 MB in the end (delta: 19.3 MB). Peak memory consumption was 19.3 MB. Max. memory is 14.2 GB. * TraceAbstraction took 34202.42 ms. Allocated memory was 317.2 MB in the beginning and 620.8 MB in the end (delta: 303.6 MB). Free memory was 248.6 MB in the beginning and 375.6 MB in the end (delta: -126.9 MB). Peak memory consumption was 176.6 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 618 VarBasedMoverChecksPositive, 16 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 55 PlacesBefore, 18 PlacesAfterwards, 53 TransitionsBefore, 13 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 45 TotalNumberOfCompositions, 881 MoverChecksTotal - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 34.0s, OverallIterations: 44, TraceHistogramMax: 6, AutomataDifference: 16.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 96 SDtfs, 597 SDslu, 91 SDs, 0 SdLazy, 2505 SolverSat, 1323 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1376 GetRequests, 486 SyntacticMatches, 37 SemanticMatches, 853 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4206 ImplicationChecksByTransitivity, 9.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4320occurred in iteration=42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 4.7s InterpolantComputationTime, 1226 NumberOfCodeBlocks, 1226 NumberOfCodeBlocksAsserted, 153 NumberOfCheckSat, 1143 ConstructedInterpolants, 0 QuantifiedInterpolants, 68187 SizeOfPredicates, 257 NumberOfNonLiveVariables, 3891 ConjunctsInSsa, 422 ConjunctsInUnsatCore, 83 InterpolantComputations, 7 PerfectInterpolantSequences, 62/840 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...