/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf -i ../../../trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 05:00:13,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 05:00:13,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 05:00:13,246 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 05:00:13,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 05:00:13,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 05:00:13,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 05:00:13,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 05:00:13,252 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 05:00:13,253 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 05:00:13,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 05:00:13,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 05:00:13,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 05:00:13,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 05:00:13,258 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 05:00:13,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 05:00:13,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 05:00:13,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 05:00:13,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 05:00:13,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 05:00:13,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 05:00:13,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 05:00:13,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 05:00:13,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 05:00:13,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 05:00:13,274 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 05:00:13,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 05:00:13,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 05:00:13,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 05:00:13,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 05:00:13,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 05:00:13,278 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 05:00:13,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 05:00:13,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 05:00:13,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 05:00:13,280 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 05:00:13,281 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf [2020-10-16 05:00:13,307 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 05:00:13,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 05:00:13,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 05:00:13,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 05:00:13,311 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 05:00:13,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 05:00:13,311 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 05:00:13,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 05:00:13,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 05:00:13,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 05:00:13,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 05:00:13,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 05:00:13,315 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 05:00:13,315 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 05:00:13,315 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 05:00:13,315 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 05:00:13,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 05:00:13,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 05:00:13,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 05:00:13,316 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 05:00:13,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 05:00:13,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 05:00:13,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 05:00:13,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 05:00:13,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 05:00:13,320 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 05:00:13,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 05:00:13,321 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 05:00:13,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 05:00:13,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 05:00:13,665 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 05:00:13,668 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 05:00:13,670 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 05:00:13,670 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 05:00:13,671 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc.i [2020-10-16 05:00:13,727 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d8c21621/ee6738d04e7a45dbbdacfd7345e4a333/FLAG36a8358b1 [2020-10-16 05:00:14,254 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 05:00:14,255 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe000_pso.oepc.i [2020-10-16 05:00:14,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d8c21621/ee6738d04e7a45dbbdacfd7345e4a333/FLAG36a8358b1 [2020-10-16 05:00:14,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d8c21621/ee6738d04e7a45dbbdacfd7345e4a333 [2020-10-16 05:00:14,573 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 05:00:14,575 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 05:00:14,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 05:00:14,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 05:00:14,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 05:00:14,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:00:14" (1/1) ... [2020-10-16 05:00:14,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e86d97c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:00:14, skipping insertion in model container [2020-10-16 05:00:14,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:00:14" (1/1) ... [2020-10-16 05:00:14,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 05:00:14,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 05:00:15,134 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 05:00:15,152 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 05:00:15,233 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 05:00:15,304 INFO L208 MainTranslator]: Completed translation [2020-10-16 05:00:15,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:00:15 WrapperNode [2020-10-16 05:00:15,305 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 05:00:15,305 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 05:00:15,306 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 05:00:15,306 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 05:00:15,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:00:15" (1/1) ... [2020-10-16 05:00:15,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:00:15" (1/1) ... [2020-10-16 05:00:15,352 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 05:00:15,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 05:00:15,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 05:00:15,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 05:00:15,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:00:15" (1/1) ... [2020-10-16 05:00:15,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:00:15" (1/1) ... [2020-10-16 05:00:15,365 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:00:15" (1/1) ... [2020-10-16 05:00:15,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:00:15" (1/1) ... [2020-10-16 05:00:15,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:00:15" (1/1) ... [2020-10-16 05:00:15,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:00:15" (1/1) ... [2020-10-16 05:00:15,376 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:00:15" (1/1) ... [2020-10-16 05:00:15,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 05:00:15,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 05:00:15,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 05:00:15,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 05:00:15,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:00:15" (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 05:00:15,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 05:00:15,450 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 05:00:15,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 05:00:15,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 05:00:15,452 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-16 05:00:15,452 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-16 05:00:15,452 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-16 05:00:15,452 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-16 05:00:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-16 05:00:15,454 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-16 05:00:15,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 05:00:15,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 05:00:15,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 05:00:15,457 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 05:00:15,816 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 05:00:15,816 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-16 05:00:15,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:00:15 BoogieIcfgContainer [2020-10-16 05:00:15,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 05:00:15,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 05:00:15,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 05:00:15,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 05:00:15,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:00:14" (1/3) ... [2020-10-16 05:00:15,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2634f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:00:15, skipping insertion in model container [2020-10-16 05:00:15,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:00:15" (2/3) ... [2020-10-16 05:00:15,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f2634f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:00:15, skipping insertion in model container [2020-10-16 05:00:15,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:00:15" (3/3) ... [2020-10-16 05:00:15,828 INFO L111 eAbstractionObserver]: Analyzing ICFG safe000_pso.oepc.i [2020-10-16 05:00:15,839 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 05:00:15,846 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 05:00:15,846 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 05:00:15,873 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,873 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,874 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,874 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,874 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,875 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,875 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,875 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,876 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,876 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,876 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,876 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,877 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,877 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,877 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,878 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,878 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,878 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,882 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,882 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,883 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,883 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,892 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,892 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,893 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,893 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,895 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,896 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,896 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,896 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:00:15,914 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-16 05:00:15,935 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:00:15,935 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:00:15,936 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:00:15,936 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:00:15,936 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:00:15,936 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:00:15,936 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:00:15,936 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:00:15,950 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 70 transitions, 155 flow [2020-10-16 05:00:15,992 INFO L129 PetriNetUnfolder]: 2/67 cut-off events. [2020-10-16 05:00:15,992 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:00:15,999 INFO L80 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 67 events. 2/67 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. 0/64 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-10-16 05:00:15,999 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 70 transitions, 155 flow [2020-10-16 05:00:16,005 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 56 transitions, 121 flow [2020-10-16 05:00:16,007 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:00:16,010 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 56 transitions, 121 flow [2020-10-16 05:00:16,013 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 56 transitions, 121 flow [2020-10-16 05:00:16,014 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 56 transitions, 121 flow [2020-10-16 05:00:16,033 INFO L129 PetriNetUnfolder]: 1/56 cut-off events. [2020-10-16 05:00:16,034 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:00:16,034 INFO L80 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 56 events. 1/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2020-10-16 05:00:16,036 INFO L117 LiptonReduction]: Number of co-enabled transitions 864 [2020-10-16 05:00:17,456 INFO L132 LiptonReduction]: Checked pairs total: 1702 [2020-10-16 05:00:17,456 INFO L134 LiptonReduction]: Total number of compositions: 41 [2020-10-16 05:00:17,459 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1454 [2020-10-16 05:00:17,467 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2020-10-16 05:00:17,467 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:00:17,468 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:00:17,469 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:00:17,469 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:00:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:00:17,475 INFO L82 PathProgramCache]: Analyzing trace with hash 967519021, now seen corresponding path program 1 times [2020-10-16 05:00:17,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:00:17,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685997220] [2020-10-16 05:00:17,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:00:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:00:17,699 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 05:00:17,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685997220] [2020-10-16 05:00:17,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:00:17,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 05:00:17,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246692471] [2020-10-16 05:00:17,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:00:17,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:00:17,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:00:17,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:00:17,733 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 111 [2020-10-16 05:00:17,735 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 43 flow. Second operand 3 states. [2020-10-16 05:00:17,735 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:00:17,736 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 111 [2020-10-16 05:00:17,737 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:00:17,759 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2020-10-16 05:00:17,759 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:00:17,760 INFO L80 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 17 events. 0/17 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 1/18 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2020-10-16 05:00:17,761 INFO L132 encePairwiseOnDemand]: 108/111 looper letters, 1 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2020-10-16 05:00:17,761 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 17 transitions, 49 flow [2020-10-16 05:00:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:00:17,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:00:17,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2020-10-16 05:00:17,778 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8678678678678678 [2020-10-16 05:00:17,779 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2020-10-16 05:00:17,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2020-10-16 05:00:17,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:00:17,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2020-10-16 05:00:17,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:00:17,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:00:17,794 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:00:17,797 INFO L185 Difference]: Start difference. First operand has 27 places, 17 transitions, 43 flow. Second operand 3 states and 289 transitions. [2020-10-16 05:00:17,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 17 transitions, 49 flow [2020-10-16 05:00:17,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 17 transitions, 46 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-16 05:00:17,803 INFO L241 Difference]: Finished difference. Result has 27 places, 17 transitions, 48 flow [2020-10-16 05:00:17,806 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2020-10-16 05:00:17,807 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2020-10-16 05:00:17,807 INFO L481 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 48 flow [2020-10-16 05:00:17,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:00:17,808 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:00:17,808 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:00:17,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 05:00:17,808 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:00:17,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:00:17,809 INFO L82 PathProgramCache]: Analyzing trace with hash -71690202, now seen corresponding path program 1 times [2020-10-16 05:00:17,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:00:17,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401951543] [2020-10-16 05:00:17,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:00:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:00:17,920 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 05:00:17,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401951543] [2020-10-16 05:00:17,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:00:17,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:00:17,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704039538] [2020-10-16 05:00:17,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:00:17,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:00:17,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:00:17,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:00:17,927 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 111 [2020-10-16 05:00:17,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 48 flow. Second operand 4 states. [2020-10-16 05:00:17,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:00:17,928 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 111 [2020-10-16 05:00:17,928 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:00:17,985 INFO L129 PetriNetUnfolder]: 13/54 cut-off events. [2020-10-16 05:00:17,989 INFO L130 PetriNetUnfolder]: For 14/18 co-relation queries the response was YES. [2020-10-16 05:00:17,990 INFO L80 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 54 events. 13/54 cut-off events. For 14/18 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 170 event pairs, 3 based on Foata normal form. 9/61 useless extension candidates. Maximal degree in co-relation 100. Up to 15 conditions per place. [2020-10-16 05:00:17,991 INFO L132 encePairwiseOnDemand]: 106/111 looper letters, 5 selfloop transitions, 3 changer transitions 4/23 dead transitions. [2020-10-16 05:00:17,991 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 87 flow [2020-10-16 05:00:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:00:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:00:17,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 362 transitions. [2020-10-16 05:00:17,996 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8153153153153153 [2020-10-16 05:00:17,996 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 362 transitions. [2020-10-16 05:00:17,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 362 transitions. [2020-10-16 05:00:17,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:00:17,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 362 transitions. [2020-10-16 05:00:17,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:00:18,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:00:18,001 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:00:18,001 INFO L185 Difference]: Start difference. First operand has 27 places, 17 transitions, 48 flow. Second operand 4 states and 362 transitions. [2020-10-16 05:00:18,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 87 flow [2020-10-16 05:00:18,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 23 transitions, 81 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 05:00:18,003 INFO L241 Difference]: Finished difference. Result has 30 places, 17 transitions, 60 flow [2020-10-16 05:00:18,003 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=60, PETRI_PLACES=30, PETRI_TRANSITIONS=17} [2020-10-16 05:00:18,004 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2020-10-16 05:00:18,004 INFO L481 AbstractCegarLoop]: Abstraction has has 30 places, 17 transitions, 60 flow [2020-10-16 05:00:18,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:00:18,005 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:00:18,005 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:00:18,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 05:00:18,005 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:00:18,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:00:18,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1490778102, now seen corresponding path program 1 times [2020-10-16 05:00:18,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:00:18,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626944738] [2020-10-16 05:00:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:00:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:00:18,065 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 05:00:18,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626944738] [2020-10-16 05:00:18,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:00:18,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 05:00:18,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957823708] [2020-10-16 05:00:18,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:00:18,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:00:18,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:00:18,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:00:18,069 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 111 [2020-10-16 05:00:18,069 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 17 transitions, 60 flow. Second operand 3 states. [2020-10-16 05:00:18,070 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:00:18,070 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 111 [2020-10-16 05:00:18,070 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:00:18,081 INFO L129 PetriNetUnfolder]: 1/20 cut-off events. [2020-10-16 05:00:18,081 INFO L130 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2020-10-16 05:00:18,082 INFO L80 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 20 events. 1/20 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 21 event pairs, 1 based on Foata normal form. 2/22 useless extension candidates. Maximal degree in co-relation 38. Up to 6 conditions per place. [2020-10-16 05:00:18,082 INFO L132 encePairwiseOnDemand]: 108/111 looper letters, 1 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2020-10-16 05:00:18,082 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 17 transitions, 66 flow [2020-10-16 05:00:18,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:00:18,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:00:18,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2020-10-16 05:00:18,086 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8678678678678678 [2020-10-16 05:00:18,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2020-10-16 05:00:18,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2020-10-16 05:00:18,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:00:18,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2020-10-16 05:00:18,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:00:18,089 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:00:18,090 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:00:18,090 INFO L185 Difference]: Start difference. First operand has 30 places, 17 transitions, 60 flow. Second operand 3 states and 289 transitions. [2020-10-16 05:00:18,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 17 transitions, 66 flow [2020-10-16 05:00:18,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 17 transitions, 58 flow, removed 1 selfloop flow, removed 3 redundant places. [2020-10-16 05:00:18,092 INFO L241 Difference]: Finished difference. Result has 30 places, 17 transitions, 60 flow [2020-10-16 05:00:18,092 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=30, PETRI_TRANSITIONS=17} [2020-10-16 05:00:18,092 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2020-10-16 05:00:18,092 INFO L481 AbstractCegarLoop]: Abstraction has has 30 places, 17 transitions, 60 flow [2020-10-16 05:00:18,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:00:18,093 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:00:18,093 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:00:18,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 05:00:18,094 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:00:18,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:00:18,094 INFO L82 PathProgramCache]: Analyzing trace with hash -875238721, now seen corresponding path program 1 times [2020-10-16 05:00:18,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:00:18,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898521824] [2020-10-16 05:00:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:00:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:00:18,157 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 05:00:18,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898521824] [2020-10-16 05:00:18,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:00:18,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:00:18,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585284906] [2020-10-16 05:00:18,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:00:18,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:00:18,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:00:18,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:00:18,165 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 111 [2020-10-16 05:00:18,166 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 17 transitions, 60 flow. Second operand 4 states. [2020-10-16 05:00:18,166 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:00:18,166 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 111 [2020-10-16 05:00:18,166 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:00:18,222 INFO L129 PetriNetUnfolder]: 2/33 cut-off events. [2020-10-16 05:00:18,222 INFO L130 PetriNetUnfolder]: For 19/21 co-relation queries the response was YES. [2020-10-16 05:00:18,222 INFO L80 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 33 events. 2/33 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 86 event pairs, 1 based on Foata normal form. 4/36 useless extension candidates. Maximal degree in co-relation 69. Up to 7 conditions per place. [2020-10-16 05:00:18,223 INFO L132 encePairwiseOnDemand]: 107/111 looper letters, 4 selfloop transitions, 2 changer transitions 3/20 dead transitions. [2020-10-16 05:00:18,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 20 transitions, 91 flow [2020-10-16 05:00:18,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 05:00:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 05:00:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 447 transitions. [2020-10-16 05:00:18,226 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8054054054054054 [2020-10-16 05:00:18,226 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 447 transitions. [2020-10-16 05:00:18,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 447 transitions. [2020-10-16 05:00:18,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:00:18,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 447 transitions. [2020-10-16 05:00:18,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 05:00:18,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 05:00:18,231 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 05:00:18,231 INFO L185 Difference]: Start difference. First operand has 30 places, 17 transitions, 60 flow. Second operand 5 states and 447 transitions. [2020-10-16 05:00:18,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 20 transitions, 91 flow [2020-10-16 05:00:18,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 20 transitions, 81 flow, removed 2 selfloop flow, removed 2 redundant places. [2020-10-16 05:00:18,233 INFO L241 Difference]: Finished difference. Result has 35 places, 17 transitions, 68 flow [2020-10-16 05:00:18,233 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=35, PETRI_TRANSITIONS=17} [2020-10-16 05:00:18,233 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 8 predicate places. [2020-10-16 05:00:18,233 INFO L481 AbstractCegarLoop]: Abstraction has has 35 places, 17 transitions, 68 flow [2020-10-16 05:00:18,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:00:18,234 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:00:18,234 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:00:18,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 05:00:18,234 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:00:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:00:18,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1880162457, now seen corresponding path program 1 times [2020-10-16 05:00:18,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:00:18,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207650048] [2020-10-16 05:00:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:00:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:00:18,282 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 05:00:18,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207650048] [2020-10-16 05:00:18,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:00:18,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:00:18,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821003174] [2020-10-16 05:00:18,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:00:18,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:00:18,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:00:18,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:00:18,285 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 111 [2020-10-16 05:00:18,286 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 17 transitions, 68 flow. Second operand 4 states. [2020-10-16 05:00:18,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:00:18,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 111 [2020-10-16 05:00:18,286 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:00:18,327 INFO L129 PetriNetUnfolder]: 1/32 cut-off events. [2020-10-16 05:00:18,327 INFO L130 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2020-10-16 05:00:18,327 INFO L80 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 32 events. 1/32 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 82 event pairs, 1 based on Foata normal form. 2/33 useless extension candidates. Maximal degree in co-relation 68. Up to 7 conditions per place. [2020-10-16 05:00:18,328 INFO L132 encePairwiseOnDemand]: 107/111 looper letters, 1 selfloop transitions, 3 changer transitions 1/18 dead transitions. [2020-10-16 05:00:18,328 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 18 transitions, 80 flow [2020-10-16 05:00:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:00:18,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:00:18,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 375 transitions. [2020-10-16 05:00:18,330 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8445945945945946 [2020-10-16 05:00:18,330 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 375 transitions. [2020-10-16 05:00:18,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 375 transitions. [2020-10-16 05:00:18,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:00:18,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 375 transitions. [2020-10-16 05:00:18,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:00:18,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:00:18,333 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:00:18,334 INFO L185 Difference]: Start difference. First operand has 35 places, 17 transitions, 68 flow. Second operand 4 states and 375 transitions. [2020-10-16 05:00:18,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 18 transitions, 80 flow [2020-10-16 05:00:18,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 18 transitions, 68 flow, removed 3 selfloop flow, removed 5 redundant places. [2020-10-16 05:00:18,336 INFO L241 Difference]: Finished difference. Result has 33 places, 17 transitions, 70 flow [2020-10-16 05:00:18,336 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=17} [2020-10-16 05:00:18,336 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2020-10-16 05:00:18,337 INFO L481 AbstractCegarLoop]: Abstraction has has 33 places, 17 transitions, 70 flow [2020-10-16 05:00:18,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:00:18,337 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:00:18,337 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:00:18,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 05:00:18,338 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:00:18,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:00:18,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1468898697, now seen corresponding path program 1 times [2020-10-16 05:00:18,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:00:18,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353089226] [2020-10-16 05:00:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:00:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:00:18,382 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 05:00:18,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353089226] [2020-10-16 05:00:18,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:00:18,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:00:18,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283964915] [2020-10-16 05:00:18,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:00:18,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:00:18,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:00:18,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:00:18,386 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 111 [2020-10-16 05:00:18,386 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 17 transitions, 70 flow. Second operand 4 states. [2020-10-16 05:00:18,386 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:00:18,386 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 111 [2020-10-16 05:00:18,386 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:00:18,409 INFO L129 PetriNetUnfolder]: 0/16 cut-off events. [2020-10-16 05:00:18,409 INFO L130 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2020-10-16 05:00:18,409 INFO L80 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 0/16 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 1/17 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2020-10-16 05:00:18,410 INFO L132 encePairwiseOnDemand]: 108/111 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2020-10-16 05:00:18,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 16 transitions, 68 flow [2020-10-16 05:00:18,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:00:18,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:00:18,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 354 transitions. [2020-10-16 05:00:18,412 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7972972972972973 [2020-10-16 05:00:18,412 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 354 transitions. [2020-10-16 05:00:18,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 354 transitions. [2020-10-16 05:00:18,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:00:18,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 354 transitions. [2020-10-16 05:00:18,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:00:18,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:00:18,415 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:00:18,415 INFO L185 Difference]: Start difference. First operand has 33 places, 17 transitions, 70 flow. Second operand 4 states and 354 transitions. [2020-10-16 05:00:18,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 16 transitions, 68 flow [2020-10-16 05:00:18,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 16 transitions, 52 flow, removed 1 selfloop flow, removed 7 redundant places. [2020-10-16 05:00:18,417 INFO L241 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2020-10-16 05:00:18,417 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=111, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2020-10-16 05:00:18,417 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2020-10-16 05:00:18,417 INFO L481 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2020-10-16 05:00:18,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:00:18,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 05:00:18,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 05:00:18 BasicIcfg [2020-10-16 05:00:18,422 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 05:00:18,425 INFO L168 Benchmark]: Toolchain (without parser) took 3849.96 ms. Allocated memory was 247.5 MB in the beginning and 364.4 MB in the end (delta: 116.9 MB). Free memory was 200.0 MB in the beginning and 302.2 MB in the end (delta: -102.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 14.2 GB. [2020-10-16 05:00:18,426 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 247.5 MB. Free memory is still 221.3 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 05:00:18,426 INFO L168 Benchmark]: CACSL2BoogieTranslator took 729.28 ms. Allocated memory was 247.5 MB in the beginning and 300.9 MB in the end (delta: 53.5 MB). Free memory was 200.0 MB in the beginning and 254.3 MB in the end (delta: -54.3 MB). Peak memory consumption was 27.0 MB. Max. memory is 14.2 GB. [2020-10-16 05:00:18,427 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.48 ms. Allocated memory is still 300.9 MB. Free memory was 254.3 MB in the beginning and 251.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 05:00:18,428 INFO L168 Benchmark]: Boogie Preprocessor took 27.94 ms. Allocated memory is still 300.9 MB. Free memory was 251.8 MB in the beginning and 249.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 05:00:18,429 INFO L168 Benchmark]: RCFGBuilder took 438.68 ms. Allocated memory is still 300.9 MB. Free memory was 249.2 MB in the beginning and 227.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-16 05:00:18,430 INFO L168 Benchmark]: TraceAbstraction took 2602.19 ms. Allocated memory was 300.9 MB in the beginning and 364.4 MB in the end (delta: 63.4 MB). Free memory was 227.4 MB in the beginning and 302.2 MB in the end (delta: -74.8 MB). There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 05:00:18,434 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 247.5 MB. Free memory is still 221.3 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 729.28 ms. Allocated memory was 247.5 MB in the beginning and 300.9 MB in the end (delta: 53.5 MB). Free memory was 200.0 MB in the beginning and 254.3 MB in the end (delta: -54.3 MB). Peak memory consumption was 27.0 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 46.48 ms. Allocated memory is still 300.9 MB. Free memory was 254.3 MB in the beginning and 251.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 27.94 ms. Allocated memory is still 300.9 MB. Free memory was 251.8 MB in the beginning and 249.2 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 438.68 ms. Allocated memory is still 300.9 MB. Free memory was 249.2 MB in the beginning and 227.4 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 2602.19 ms. Allocated memory was 300.9 MB in the beginning and 364.4 MB in the end (delta: 63.4 MB). Free memory was 227.4 MB in the beginning and 302.2 MB in the end (delta: -74.8 MB). There was no memory consumed. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 557 VarBasedMoverChecksPositive, 51 VarBasedMoverChecksNegative, 7 SemBasedMoverChecksPositive, 44 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 71 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.4s, 65 PlacesBefore, 27 PlacesAfterwards, 56 TransitionsBefore, 17 TransitionsAfterwards, 864 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 1 ConcurrentYvCompositions, 1 ChoiceCompositions, 41 TotalNumberOfCompositions, 1702 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, 69 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: 2.4s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 24 SDtfs, 11 SDslu, 5 SDs, 0 SdLazy, 34 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=5, 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, 0.2s InterpolantComputationTime, 67 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 61 ConstructedInterpolants, 0 QuantifiedInterpolants, 1765 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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...