/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-wmm/safe017_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 01:41:05,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 01:41:05,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 01:41:05,534 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 01:41:05,534 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 01:41:05,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 01:41:05,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 01:41:05,538 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 01:41:05,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 01:41:05,540 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 01:41:05,541 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 01:41:05,542 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 01:41:05,543 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 01:41:05,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 01:41:05,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 01:41:05,545 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 01:41:05,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 01:41:05,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 01:41:05,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 01:41:05,551 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 01:41:05,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 01:41:05,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 01:41:05,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 01:41:05,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 01:41:05,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 01:41:05,571 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 01:41:05,571 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 01:41:05,572 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 01:41:05,573 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 01:41:05,573 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 01:41:05,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 01:41:05,576 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 01:41:05,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 01:41:05,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 01:41:05,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 01:41:05,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 01:41:05,579 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 01:41:05,628 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 01:41:05,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 01:41:05,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 01:41:05,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 01:41:05,629 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 01:41:05,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 01:41:05,630 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 01:41:05,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 01:41:05,632 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 01:41:05,632 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 01:41:05,632 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 01:41:05,632 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 01:41:05,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 01:41:05,633 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 01:41:05,633 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 01:41:05,633 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 01:41:05,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 01:41:05,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 01:41:05,634 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 01:41:05,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 01:41:05,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 01:41:05,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 01:41:05,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 01:41:05,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 01:41:05,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 01:41:05,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 01:41:05,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 01:41:05,636 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 01:41:05,637 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 01:41:05,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 01:41:05,946 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 01:41:05,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 01:41:05,950 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 01:41:05,951 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 01:41:05,951 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe017_tso.opt.i [2020-10-16 01:41:06,009 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1c3ff18d/5d6aff0d6f1240829d47aa09db7f8fc9/FLAGdca8c05bf [2020-10-16 01:41:06,503 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 01:41:06,504 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe017_tso.opt.i [2020-10-16 01:41:06,521 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1c3ff18d/5d6aff0d6f1240829d47aa09db7f8fc9/FLAGdca8c05bf [2020-10-16 01:41:06,841 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1c3ff18d/5d6aff0d6f1240829d47aa09db7f8fc9 [2020-10-16 01:41:06,851 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 01:41:06,854 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 01:41:06,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 01:41:06,857 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 01:41:06,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 01:41:06,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:41:06" (1/1) ... [2020-10-16 01:41:06,865 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3325b6fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:41:06, skipping insertion in model container [2020-10-16 01:41:06,865 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:41:06" (1/1) ... [2020-10-16 01:41:06,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 01:41:06,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 01:41:07,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 01:41:07,358 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 01:41:07,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 01:41:07,517 INFO L208 MainTranslator]: Completed translation [2020-10-16 01:41:07,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:41:07 WrapperNode [2020-10-16 01:41:07,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 01:41:07,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 01:41:07,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 01:41:07,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 01:41:07,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:41:07" (1/1) ... [2020-10-16 01:41:07,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:41:07" (1/1) ... [2020-10-16 01:41:07,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 01:41:07,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 01:41:07,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 01:41:07,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 01:41:07,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:41:07" (1/1) ... [2020-10-16 01:41:07,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:41:07" (1/1) ... [2020-10-16 01:41:07,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:41:07" (1/1) ... [2020-10-16 01:41:07,574 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:41:07" (1/1) ... [2020-10-16 01:41:07,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:41:07" (1/1) ... [2020-10-16 01:41:07,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:41:07" (1/1) ... [2020-10-16 01:41:07,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:41:07" (1/1) ... [2020-10-16 01:41:07,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 01:41:07,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 01:41:07,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 01:41:07,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 01:41:07,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:41:07" (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 01:41:07,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 01:41:07,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 01:41:07,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 01:41:07,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 01:41:07,654 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-16 01:41:07,654 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-16 01:41:07,654 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-16 01:41:07,655 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-16 01:41:07,655 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-16 01:41:07,655 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-16 01:41:07,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 01:41:07,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 01:41:07,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 01:41:07,657 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 01:41:08,040 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 01:41:08,041 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-16 01:41:08,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:41:08 BoogieIcfgContainer [2020-10-16 01:41:08,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 01:41:08,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 01:41:08,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 01:41:08,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 01:41:08,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:41:06" (1/3) ... [2020-10-16 01:41:08,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@115358b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:41:08, skipping insertion in model container [2020-10-16 01:41:08,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:41:07" (2/3) ... [2020-10-16 01:41:08,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@115358b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:41:08, skipping insertion in model container [2020-10-16 01:41:08,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:41:08" (3/3) ... [2020-10-16 01:41:08,051 INFO L111 eAbstractionObserver]: Analyzing ICFG safe017_tso.opt.i [2020-10-16 01:41:08,062 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 01:41:08,069 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 01:41:08,070 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 01:41:08,094 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,094 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,094 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,095 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,095 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,096 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,096 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,096 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,096 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,097 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,097 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,097 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,098 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,098 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,098 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,098 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,099 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,099 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,102 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,103 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,103 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,103 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,109 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,109 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,109 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,110 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,112 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,112 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,112 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,112 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:41:08,133 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-16 01:41:08,150 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 01:41:08,150 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 01:41:08,150 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 01:41:08,150 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 01:41:08,150 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 01:41:08,150 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 01:41:08,150 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 01:41:08,151 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 01:41:08,161 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 75 places, 67 transitions, 149 flow [2020-10-16 01:41:08,198 INFO L129 PetriNetUnfolder]: 2/64 cut-off events. [2020-10-16 01:41:08,198 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:41:08,203 INFO L80 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 64 events. 2/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2020-10-16 01:41:08,203 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 67 transitions, 149 flow [2020-10-16 01:41:08,209 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 53 transitions, 115 flow [2020-10-16 01:41:08,211 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 01:41:08,213 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 53 transitions, 115 flow [2020-10-16 01:41:08,216 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 53 transitions, 115 flow [2020-10-16 01:41:08,216 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 62 places, 53 transitions, 115 flow [2020-10-16 01:41:08,232 INFO L129 PetriNetUnfolder]: 1/53 cut-off events. [2020-10-16 01:41:08,233 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:41:08,233 INFO L80 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 53 events. 1/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-16 01:41:08,236 INFO L117 LiptonReduction]: Number of co-enabled transitions 804 [2020-10-16 01:41:09,405 INFO L132 LiptonReduction]: Checked pairs total: 1270 [2020-10-16 01:41:09,406 INFO L134 LiptonReduction]: Total number of compositions: 41 [2020-10-16 01:41:09,409 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1200 [2020-10-16 01:41:09,417 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2020-10-16 01:41:09,417 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:41:09,418 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:41:09,419 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:41:09,419 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:41:09,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:41:09,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1046652456, now seen corresponding path program 1 times [2020-10-16 01:41:09,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:41:09,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475420727] [2020-10-16 01:41:09,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:41:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:41:09,641 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 01:41:09,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475420727] [2020-10-16 01:41:09,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:41:09,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 01:41:09,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620337154] [2020-10-16 01:41:09,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 01:41:09,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:41:09,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 01:41:09,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 01:41:09,674 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 108 [2020-10-16 01:41:09,676 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 17 transitions, 43 flow. Second operand 3 states. [2020-10-16 01:41:09,676 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:41:09,676 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 108 [2020-10-16 01:41:09,678 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:41:09,707 INFO L129 PetriNetUnfolder]: 12/42 cut-off events. [2020-10-16 01:41:09,707 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:41:09,708 INFO L80 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 42 events. 12/42 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 113 event pairs, 2 based on Foata normal form. 8/47 useless extension candidates. Maximal degree in co-relation 69. Up to 25 conditions per place. [2020-10-16 01:41:09,710 INFO L132 encePairwiseOnDemand]: 103/108 looper letters, 5 selfloop transitions, 3 changer transitions 0/19 dead transitions. [2020-10-16 01:41:09,710 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 19 transitions, 63 flow [2020-10-16 01:41:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 01:41:09,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 01:41:09,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2020-10-16 01:41:09,726 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8487654320987654 [2020-10-16 01:41:09,726 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2020-10-16 01:41:09,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2020-10-16 01:41:09,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:41:09,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2020-10-16 01:41:09,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 01:41:09,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 01:41:09,741 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 01:41:09,743 INFO L185 Difference]: Start difference. First operand has 26 places, 17 transitions, 43 flow. Second operand 3 states and 275 transitions. [2020-10-16 01:41:09,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 19 transitions, 63 flow [2020-10-16 01:41:09,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 19 transitions, 60 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-16 01:41:09,749 INFO L241 Difference]: Finished difference. Result has 26 places, 18 transitions, 57 flow [2020-10-16 01:41:09,752 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=26, PETRI_TRANSITIONS=18} [2020-10-16 01:41:09,753 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2020-10-16 01:41:09,753 INFO L481 AbstractCegarLoop]: Abstraction has has 26 places, 18 transitions, 57 flow [2020-10-16 01:41:09,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 01:41:09,753 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:41:09,753 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:41:09,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 01:41:09,754 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:41:09,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:41:09,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1913511813, now seen corresponding path program 1 times [2020-10-16 01:41:09,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:41:09,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411590088] [2020-10-16 01:41:09,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:41:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:41:09,819 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 01:41:09,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411590088] [2020-10-16 01:41:09,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:41:09,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 01:41:09,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224709972] [2020-10-16 01:41:09,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 01:41:09,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:41:09,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 01:41:09,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 01:41:09,824 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 108 [2020-10-16 01:41:09,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 18 transitions, 57 flow. Second operand 3 states. [2020-10-16 01:41:09,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:41:09,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 108 [2020-10-16 01:41:09,825 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:41:09,855 INFO L129 PetriNetUnfolder]: 9/37 cut-off events. [2020-10-16 01:41:09,855 INFO L130 PetriNetUnfolder]: For 8/10 co-relation queries the response was YES. [2020-10-16 01:41:09,856 INFO L80 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 37 events. 9/37 cut-off events. For 8/10 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 83 event pairs, 4 based on Foata normal form. 1/34 useless extension candidates. Maximal degree in co-relation 70. Up to 16 conditions per place. [2020-10-16 01:41:09,856 INFO L132 encePairwiseOnDemand]: 104/108 looper letters, 3 selfloop transitions, 3 changer transitions 0/20 dead transitions. [2020-10-16 01:41:09,857 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 20 transitions, 73 flow [2020-10-16 01:41:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 01:41:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 01:41:09,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2020-10-16 01:41:09,862 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8549382716049383 [2020-10-16 01:41:09,862 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2020-10-16 01:41:09,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2020-10-16 01:41:09,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:41:09,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2020-10-16 01:41:09,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 01:41:09,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 01:41:09,870 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 01:41:09,870 INFO L185 Difference]: Start difference. First operand has 26 places, 18 transitions, 57 flow. Second operand 3 states and 277 transitions. [2020-10-16 01:41:09,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 20 transitions, 73 flow [2020-10-16 01:41:09,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 20 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 01:41:09,871 INFO L241 Difference]: Finished difference. Result has 28 places, 20 transitions, 73 flow [2020-10-16 01:41:09,872 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2020-10-16 01:41:09,873 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2020-10-16 01:41:09,873 INFO L481 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 73 flow [2020-10-16 01:41:09,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 01:41:09,873 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:41:09,874 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:41:09,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 01:41:09,874 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:41:09,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:41:09,874 INFO L82 PathProgramCache]: Analyzing trace with hash -810694867, now seen corresponding path program 1 times [2020-10-16 01:41:09,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:41:09,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99913718] [2020-10-16 01:41:09,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:41:09,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:41:09,960 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 01:41:09,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99913718] [2020-10-16 01:41:09,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:41:09,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:41:09,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131068599] [2020-10-16 01:41:09,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 01:41:09,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:41:09,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 01:41:09,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 01:41:09,965 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 108 [2020-10-16 01:41:09,965 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 73 flow. Second operand 3 states. [2020-10-16 01:41:09,965 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:41:09,965 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 108 [2020-10-16 01:41:09,966 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:41:09,996 INFO L129 PetriNetUnfolder]: 11/53 cut-off events. [2020-10-16 01:41:09,996 INFO L130 PetriNetUnfolder]: For 36/63 co-relation queries the response was YES. [2020-10-16 01:41:09,998 INFO L80 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 53 events. 11/53 cut-off events. For 36/63 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 191 event pairs, 6 based on Foata normal form. 6/56 useless extension candidates. Maximal degree in co-relation 113. Up to 18 conditions per place. [2020-10-16 01:41:09,999 INFO L132 encePairwiseOnDemand]: 105/108 looper letters, 5 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2020-10-16 01:41:09,999 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 21 transitions, 91 flow [2020-10-16 01:41:10,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 01:41:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 01:41:10,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2020-10-16 01:41:10,003 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8395061728395061 [2020-10-16 01:41:10,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2020-10-16 01:41:10,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2020-10-16 01:41:10,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:41:10,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2020-10-16 01:41:10,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 01:41:10,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 01:41:10,007 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 01:41:10,007 INFO L185 Difference]: Start difference. First operand has 28 places, 20 transitions, 73 flow. Second operand 3 states and 272 transitions. [2020-10-16 01:41:10,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 21 transitions, 91 flow [2020-10-16 01:41:10,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 01:41:10,009 INFO L241 Difference]: Finished difference. Result has 30 places, 20 transitions, 81 flow [2020-10-16 01:41:10,010 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2020-10-16 01:41:10,010 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 4 predicate places. [2020-10-16 01:41:10,010 INFO L481 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 81 flow [2020-10-16 01:41:10,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 01:41:10,010 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:41:10,011 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:41:10,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 01:41:10,011 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:41:10,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:41:10,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1124808598, now seen corresponding path program 1 times [2020-10-16 01:41:10,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:41:10,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758879816] [2020-10-16 01:41:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:41:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:41:10,099 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 01:41:10,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758879816] [2020-10-16 01:41:10,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:41:10,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 01:41:10,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562182443] [2020-10-16 01:41:10,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 01:41:10,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:41:10,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 01:41:10,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 01:41:10,103 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 108 [2020-10-16 01:41:10,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 81 flow. Second operand 3 states. [2020-10-16 01:41:10,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:41:10,104 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 108 [2020-10-16 01:41:10,104 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:41:10,117 INFO L129 PetriNetUnfolder]: 4/34 cut-off events. [2020-10-16 01:41:10,117 INFO L130 PetriNetUnfolder]: For 69/87 co-relation queries the response was YES. [2020-10-16 01:41:10,118 INFO L80 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 34 events. 4/34 cut-off events. For 69/87 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 81 event pairs, 2 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 76. Up to 13 conditions per place. [2020-10-16 01:41:10,119 INFO L132 encePairwiseOnDemand]: 105/108 looper letters, 1 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2020-10-16 01:41:10,119 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 20 transitions, 87 flow [2020-10-16 01:41:10,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 01:41:10,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 01:41:10,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2020-10-16 01:41:10,121 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8734567901234568 [2020-10-16 01:41:10,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2020-10-16 01:41:10,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2020-10-16 01:41:10,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:41:10,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2020-10-16 01:41:10,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 01:41:10,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 01:41:10,124 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 01:41:10,124 INFO L185 Difference]: Start difference. First operand has 30 places, 20 transitions, 81 flow. Second operand 3 states and 283 transitions. [2020-10-16 01:41:10,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 20 transitions, 87 flow [2020-10-16 01:41:10,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 20 transitions, 82 flow, removed 1 selfloop flow, removed 1 redundant places. [2020-10-16 01:41:10,126 INFO L241 Difference]: Finished difference. Result has 32 places, 20 transitions, 84 flow [2020-10-16 01:41:10,127 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2020-10-16 01:41:10,127 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2020-10-16 01:41:10,127 INFO L481 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 84 flow [2020-10-16 01:41:10,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 01:41:10,127 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:41:10,128 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:41:10,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 01:41:10,128 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:41:10,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:41:10,129 INFO L82 PathProgramCache]: Analyzing trace with hash 619888563, now seen corresponding path program 1 times [2020-10-16 01:41:10,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:41:10,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038560090] [2020-10-16 01:41:10,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:41:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:41:10,167 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 01:41:10,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038560090] [2020-10-16 01:41:10,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:41:10,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:41:10,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295605231] [2020-10-16 01:41:10,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:41:10,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:41:10,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:41:10,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:41:10,171 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 108 [2020-10-16 01:41:10,188 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 20 transitions, 84 flow. Second operand 4 states. [2020-10-16 01:41:10,188 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:41:10,189 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 108 [2020-10-16 01:41:10,189 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:41:10,230 INFO L129 PetriNetUnfolder]: 7/59 cut-off events. [2020-10-16 01:41:10,231 INFO L130 PetriNetUnfolder]: For 124/151 co-relation queries the response was YES. [2020-10-16 01:41:10,231 INFO L80 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 59 events. 7/59 cut-off events. For 124/151 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 230 event pairs, 2 based on Foata normal form. 10/68 useless extension candidates. Maximal degree in co-relation 145. Up to 19 conditions per place. [2020-10-16 01:41:10,232 INFO L132 encePairwiseOnDemand]: 103/108 looper letters, 4 selfloop transitions, 4 changer transitions 2/23 dead transitions. [2020-10-16 01:41:10,232 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 23 transitions, 119 flow [2020-10-16 01:41:10,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 01:41:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 01:41:10,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 355 transitions. [2020-10-16 01:41:10,234 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8217592592592593 [2020-10-16 01:41:10,234 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 355 transitions. [2020-10-16 01:41:10,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 355 transitions. [2020-10-16 01:41:10,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:41:10,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 355 transitions. [2020-10-16 01:41:10,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 01:41:10,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 01:41:10,237 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 01:41:10,237 INFO L185 Difference]: Start difference. First operand has 32 places, 20 transitions, 84 flow. Second operand 4 states and 355 transitions. [2020-10-16 01:41:10,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 23 transitions, 119 flow [2020-10-16 01:41:10,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 23 transitions, 113 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 01:41:10,239 INFO L241 Difference]: Finished difference. Result has 34 places, 20 transitions, 93 flow [2020-10-16 01:41:10,240 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=34, PETRI_TRANSITIONS=20} [2020-10-16 01:41:10,240 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 8 predicate places. [2020-10-16 01:41:10,240 INFO L481 AbstractCegarLoop]: Abstraction has has 34 places, 20 transitions, 93 flow [2020-10-16 01:41:10,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:41:10,240 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:41:10,240 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:41:10,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 01:41:10,241 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:41:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:41:10,241 INFO L82 PathProgramCache]: Analyzing trace with hash 638829873, now seen corresponding path program 2 times [2020-10-16 01:41:10,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:41:10,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904066940] [2020-10-16 01:41:10,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:41:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:41:10,316 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 01:41:10,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904066940] [2020-10-16 01:41:10,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:41:10,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:41:10,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182153399] [2020-10-16 01:41:10,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:41:10,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:41:10,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:41:10,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:41:10,319 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 108 [2020-10-16 01:41:10,320 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 20 transitions, 93 flow. Second operand 4 states. [2020-10-16 01:41:10,320 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:41:10,320 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 108 [2020-10-16 01:41:10,320 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:41:10,374 INFO L129 PetriNetUnfolder]: 67/157 cut-off events. [2020-10-16 01:41:10,374 INFO L130 PetriNetUnfolder]: For 572/616 co-relation queries the response was YES. [2020-10-16 01:41:10,376 INFO L80 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 157 events. 67/157 cut-off events. For 572/616 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 721 event pairs, 28 based on Foata normal form. 27/172 useless extension candidates. Maximal degree in co-relation 407. Up to 102 conditions per place. [2020-10-16 01:41:10,377 INFO L132 encePairwiseOnDemand]: 102/108 looper letters, 7 selfloop transitions, 7 changer transitions 2/30 dead transitions. [2020-10-16 01:41:10,377 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 30 transitions, 145 flow [2020-10-16 01:41:10,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 01:41:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 01:41:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 393 transitions. [2020-10-16 01:41:10,379 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7277777777777777 [2020-10-16 01:41:10,379 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 393 transitions. [2020-10-16 01:41:10,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 393 transitions. [2020-10-16 01:41:10,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:41:10,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 393 transitions. [2020-10-16 01:41:10,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 01:41:10,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 01:41:10,382 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 01:41:10,383 INFO L185 Difference]: Start difference. First operand has 34 places, 20 transitions, 93 flow. Second operand 5 states and 393 transitions. [2020-10-16 01:41:10,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 30 transitions, 145 flow [2020-10-16 01:41:10,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 135 flow, removed 1 selfloop flow, removed 3 redundant places. [2020-10-16 01:41:10,385 INFO L241 Difference]: Finished difference. Result has 38 places, 26 transitions, 137 flow [2020-10-16 01:41:10,386 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=137, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2020-10-16 01:41:10,386 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2020-10-16 01:41:10,386 INFO L481 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 137 flow [2020-10-16 01:41:10,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:41:10,386 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:41:10,386 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:41:10,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 01:41:10,387 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:41:10,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:41:10,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1100363426, now seen corresponding path program 1 times [2020-10-16 01:41:10,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:41:10,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664603644] [2020-10-16 01:41:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:41:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:41:10,466 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 01:41:10,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664603644] [2020-10-16 01:41:10,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:41:10,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 01:41:10,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712006316] [2020-10-16 01:41:10,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 01:41:10,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:41:10,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 01:41:10,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 01:41:10,476 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 108 [2020-10-16 01:41:10,477 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 137 flow. Second operand 5 states. [2020-10-16 01:41:10,477 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:41:10,477 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 108 [2020-10-16 01:41:10,477 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:41:10,566 INFO L129 PetriNetUnfolder]: 41/122 cut-off events. [2020-10-16 01:41:10,566 INFO L130 PetriNetUnfolder]: For 547/723 co-relation queries the response was YES. [2020-10-16 01:41:10,568 INFO L80 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 122 events. 41/122 cut-off events. For 547/723 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 559 event pairs, 4 based on Foata normal form. 67/182 useless extension candidates. Maximal degree in co-relation 461. Up to 91 conditions per place. [2020-10-16 01:41:10,568 INFO L132 encePairwiseOnDemand]: 102/108 looper letters, 5 selfloop transitions, 13 changer transitions 4/36 dead transitions. [2020-10-16 01:41:10,569 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 36 transitions, 239 flow [2020-10-16 01:41:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 01:41:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 01:41:10,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 549 transitions. [2020-10-16 01:41:10,571 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7261904761904762 [2020-10-16 01:41:10,571 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 549 transitions. [2020-10-16 01:41:10,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 549 transitions. [2020-10-16 01:41:10,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:41:10,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 549 transitions. [2020-10-16 01:41:10,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 01:41:10,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 01:41:10,575 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 01:41:10,575 INFO L185 Difference]: Start difference. First operand has 38 places, 26 transitions, 137 flow. Second operand 7 states and 549 transitions. [2020-10-16 01:41:10,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 36 transitions, 239 flow [2020-10-16 01:41:10,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 36 transitions, 235 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 01:41:10,579 INFO L241 Difference]: Finished difference. Result has 46 places, 32 transitions, 221 flow [2020-10-16 01:41:10,579 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=221, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2020-10-16 01:41:10,579 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 20 predicate places. [2020-10-16 01:41:10,580 INFO L481 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 221 flow [2020-10-16 01:41:10,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 01:41:10,580 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:41:10,580 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:41:10,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 01:41:10,580 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:41:10,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:41:10,581 INFO L82 PathProgramCache]: Analyzing trace with hash -448714671, now seen corresponding path program 1 times [2020-10-16 01:41:10,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:41:10,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381288342] [2020-10-16 01:41:10,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:41:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:41:10,603 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 01:41:10,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381288342] [2020-10-16 01:41:10,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:41:10,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:41:10,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175234509] [2020-10-16 01:41:10,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 01:41:10,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:41:10,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 01:41:10,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 01:41:10,606 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 108 [2020-10-16 01:41:10,606 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 221 flow. Second operand 3 states. [2020-10-16 01:41:10,606 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:41:10,607 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 108 [2020-10-16 01:41:10,607 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:41:10,636 INFO L129 PetriNetUnfolder]: 30/118 cut-off events. [2020-10-16 01:41:10,637 INFO L130 PetriNetUnfolder]: For 711/824 co-relation queries the response was YES. [2020-10-16 01:41:10,637 INFO L80 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 118 events. 30/118 cut-off events. For 711/824 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 606 event pairs, 3 based on Foata normal form. 15/127 useless extension candidates. Maximal degree in co-relation 481. Up to 92 conditions per place. [2020-10-16 01:41:10,638 INFO L132 encePairwiseOnDemand]: 105/108 looper letters, 3 selfloop transitions, 3 changer transitions 7/32 dead transitions. [2020-10-16 01:41:10,638 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 32 transitions, 233 flow [2020-10-16 01:41:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 01:41:10,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 01:41:10,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 276 transitions. [2020-10-16 01:41:10,640 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8518518518518519 [2020-10-16 01:41:10,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 276 transitions. [2020-10-16 01:41:10,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 276 transitions. [2020-10-16 01:41:10,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:41:10,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 276 transitions. [2020-10-16 01:41:10,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 01:41:10,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 01:41:10,642 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 01:41:10,642 INFO L185 Difference]: Start difference. First operand has 46 places, 32 transitions, 221 flow. Second operand 3 states and 276 transitions. [2020-10-16 01:41:10,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 32 transitions, 233 flow [2020-10-16 01:41:10,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 32 transitions, 203 flow, removed 11 selfloop flow, removed 2 redundant places. [2020-10-16 01:41:10,647 INFO L241 Difference]: Finished difference. Result has 47 places, 25 transitions, 154 flow [2020-10-16 01:41:10,647 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=25} [2020-10-16 01:41:10,647 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 21 predicate places. [2020-10-16 01:41:10,647 INFO L481 AbstractCegarLoop]: Abstraction has has 47 places, 25 transitions, 154 flow [2020-10-16 01:41:10,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 01:41:10,648 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:41:10,648 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:41:10,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-16 01:41:10,648 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:41:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:41:10,648 INFO L82 PathProgramCache]: Analyzing trace with hash 563745339, now seen corresponding path program 1 times [2020-10-16 01:41:10,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:41:10,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623331961] [2020-10-16 01:41:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:41:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:41:10,707 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 01:41:10,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623331961] [2020-10-16 01:41:10,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:41:10,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 01:41:10,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789855275] [2020-10-16 01:41:10,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 01:41:10,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:41:10,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 01:41:10,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 01:41:10,710 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 108 [2020-10-16 01:41:10,711 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 25 transitions, 154 flow. Second operand 6 states. [2020-10-16 01:41:10,711 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:41:10,711 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 108 [2020-10-16 01:41:10,711 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:41:10,759 INFO L129 PetriNetUnfolder]: 15/68 cut-off events. [2020-10-16 01:41:10,759 INFO L130 PetriNetUnfolder]: For 198/255 co-relation queries the response was YES. [2020-10-16 01:41:10,760 INFO L80 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 68 events. 15/68 cut-off events. For 198/255 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 259 event pairs, 0 based on Foata normal form. 28/92 useless extension candidates. Maximal degree in co-relation 268. Up to 37 conditions per place. [2020-10-16 01:41:10,760 INFO L132 encePairwiseOnDemand]: 102/108 looper letters, 0 selfloop transitions, 0 changer transitions 27/27 dead transitions. [2020-10-16 01:41:10,760 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 27 transitions, 184 flow [2020-10-16 01:41:10,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 01:41:10,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 01:41:10,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 539 transitions. [2020-10-16 01:41:10,763 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7129629629629629 [2020-10-16 01:41:10,763 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 539 transitions. [2020-10-16 01:41:10,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 539 transitions. [2020-10-16 01:41:10,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:41:10,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 539 transitions. [2020-10-16 01:41:10,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 01:41:10,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 01:41:10,767 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 01:41:10,767 INFO L185 Difference]: Start difference. First operand has 47 places, 25 transitions, 154 flow. Second operand 7 states and 539 transitions. [2020-10-16 01:41:10,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 27 transitions, 184 flow [2020-10-16 01:41:10,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 27 transitions, 159 flow, removed 7 selfloop flow, removed 6 redundant places. [2020-10-16 01:41:10,769 INFO L241 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2020-10-16 01:41:10,769 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=108, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2020-10-16 01:41:10,769 INFO L342 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2020-10-16 01:41:10,770 INFO L481 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2020-10-16 01:41:10,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 01:41:10,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 01:41:10,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 01:41:10 BasicIcfg [2020-10-16 01:41:10,774 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 01:41:10,777 INFO L168 Benchmark]: Toolchain (without parser) took 3922.47 ms. Allocated memory was 252.2 MB in the beginning and 371.2 MB in the end (delta: 119.0 MB). Free memory was 206.7 MB in the beginning and 239.0 MB in the end (delta: -32.3 MB). Peak memory consumption was 86.7 MB. Max. memory is 14.2 GB. [2020-10-16 01:41:10,777 INFO L168 Benchmark]: CDTParser took 0.20 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 01:41:10,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 662.86 ms. Allocated memory was 252.2 MB in the beginning and 316.7 MB in the end (delta: 64.5 MB). Free memory was 206.7 MB in the beginning and 267.3 MB in the end (delta: -60.6 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. [2020-10-16 01:41:10,779 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.69 ms. Allocated memory is still 316.7 MB. Free memory was 267.3 MB in the beginning and 264.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 01:41:10,780 INFO L168 Benchmark]: Boogie Preprocessor took 26.57 ms. Allocated memory is still 316.7 MB. Free memory was 264.8 MB in the beginning and 262.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 01:41:10,780 INFO L168 Benchmark]: RCFGBuilder took 454.27 ms. Allocated memory is still 316.7 MB. Free memory was 262.3 MB in the beginning and 240.5 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-16 01:41:10,781 INFO L168 Benchmark]: TraceAbstraction took 2729.90 ms. Allocated memory was 316.7 MB in the beginning and 371.2 MB in the end (delta: 54.5 MB). Free memory was 240.5 MB in the beginning and 239.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 56.0 MB. Max. memory is 14.2 GB. [2020-10-16 01:41:10,785 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 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 662.86 ms. Allocated memory was 252.2 MB in the beginning and 316.7 MB in the end (delta: 64.5 MB). Free memory was 206.7 MB in the beginning and 267.3 MB in the end (delta: -60.6 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 41.69 ms. Allocated memory is still 316.7 MB. Free memory was 267.3 MB in the beginning and 264.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 26.57 ms. Allocated memory is still 316.7 MB. Free memory was 264.8 MB in the beginning and 262.3 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 454.27 ms. Allocated memory is still 316.7 MB. Free memory was 262.3 MB in the beginning and 240.5 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 2729.90 ms. Allocated memory was 316.7 MB in the beginning and 371.2 MB in the end (delta: 54.5 MB). Free memory was 240.5 MB in the beginning and 239.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 56.0 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 579 VarBasedMoverChecksPositive, 40 VarBasedMoverChecksNegative, 10 SemBasedMoverChecksPositive, 30 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 69 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.1s, 62 PlacesBefore, 26 PlacesAfterwards, 53 TransitionsBefore, 17 TransitionsAfterwards, 804 CoEnabledTransitionPairs, 4 FixpointIterations, 12 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 0 ChoiceCompositions, 41 TotalNumberOfCompositions, 1270 MoverChecksTotal - PositiveResult [Line: 7]: 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 4 procedures, 66 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: 2.6s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 37 SDtfs, 14 SDslu, 9 SDs, 0 SdLazy, 105 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=221occurred in iteration=7, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 89 ConstructedInterpolants, 0 QuantifiedInterpolants, 2699 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...