/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/safe023_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 01:42:53,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 01:42:53,214 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 01:42:53,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 01:42:53,238 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 01:42:53,239 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 01:42:53,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 01:42:53,242 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 01:42:53,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 01:42:53,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 01:42:53,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 01:42:53,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 01:42:53,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 01:42:53,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 01:42:53,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 01:42:53,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 01:42:53,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 01:42:53,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 01:42:53,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 01:42:53,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 01:42:53,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 01:42:53,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 01:42:53,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 01:42:53,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 01:42:53,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 01:42:53,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 01:42:53,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 01:42:53,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 01:42:53,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 01:42:53,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 01:42:53,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 01:42:53,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 01:42:53,286 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 01:42:53,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 01:42:53,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 01:42:53,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 01:42:53,288 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 01:42:53,341 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 01:42:53,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 01:42:53,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 01:42:53,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 01:42:53,343 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 01:42:53,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 01:42:53,343 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 01:42:53,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 01:42:53,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 01:42:53,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 01:42:53,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 01:42:53,344 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 01:42:53,344 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 01:42:53,345 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 01:42:53,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 01:42:53,346 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 01:42:53,347 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 01:42:53,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 01:42:53,347 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 01:42:53,347 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 01:42:53,347 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 01:42:53,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 01:42:53,348 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 01:42:53,348 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 01:42:53,348 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 01:42:53,348 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 01:42:53,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 01:42:53,349 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 01:42:53,349 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 01:42:53,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 01:42:53,650 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 01:42:53,653 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 01:42:53,655 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 01:42:53,655 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 01:42:53,656 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.opt.i [2020-10-16 01:42:53,733 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789cf8767/b9cec0f4a5f5425d8aaa7ef50bfc68af/FLAGf5aa50433 [2020-10-16 01:42:54,295 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 01:42:54,296 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.opt.i [2020-10-16 01:42:54,314 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789cf8767/b9cec0f4a5f5425d8aaa7ef50bfc68af/FLAGf5aa50433 [2020-10-16 01:42:54,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/789cf8767/b9cec0f4a5f5425d8aaa7ef50bfc68af [2020-10-16 01:42:54,583 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 01:42:54,585 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 01:42:54,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 01:42:54,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 01:42:54,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 01:42:54,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:42:54" (1/1) ... [2020-10-16 01:42:54,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18ee6a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:54, skipping insertion in model container [2020-10-16 01:42:54,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 01:42:54" (1/1) ... [2020-10-16 01:42:54,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 01:42:54,676 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 01:42:55,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 01:42:55,227 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 01:42:55,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 01:42:55,350 INFO L208 MainTranslator]: Completed translation [2020-10-16 01:42:55,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:55 WrapperNode [2020-10-16 01:42:55,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 01:42:55,352 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 01:42:55,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 01:42:55,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 01:42:55,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:55" (1/1) ... [2020-10-16 01:42:55,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:55" (1/1) ... [2020-10-16 01:42:55,400 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 01:42:55,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 01:42:55,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 01:42:55,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 01:42:55,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:55" (1/1) ... [2020-10-16 01:42:55,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:55" (1/1) ... [2020-10-16 01:42:55,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:55" (1/1) ... [2020-10-16 01:42:55,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:55" (1/1) ... [2020-10-16 01:42:55,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:55" (1/1) ... [2020-10-16 01:42:55,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:55" (1/1) ... [2020-10-16 01:42:55,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:55" (1/1) ... [2020-10-16 01:42:55,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 01:42:55,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 01:42:55,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 01:42:55,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 01:42:55,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:55" (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 01:42:55,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 01:42:55,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-16 01:42:55,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 01:42:55,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 01:42:55,491 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-10-16 01:42:55,491 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-10-16 01:42:55,492 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-10-16 01:42:55,492 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-10-16 01:42:55,492 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-10-16 01:42:55,492 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-10-16 01:42:55,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-16 01:42:55,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 01:42:55,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 01:42:55,494 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 01:42:55,826 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 01:42:55,826 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-16 01:42:55,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:42:55 BoogieIcfgContainer [2020-10-16 01:42:55,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 01:42:55,832 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 01:42:55,832 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 01:42:55,835 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 01:42:55,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 01:42:54" (1/3) ... [2020-10-16 01:42:55,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79880d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:42:55, skipping insertion in model container [2020-10-16 01:42:55,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 01:42:55" (2/3) ... [2020-10-16 01:42:55,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79880d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 01:42:55, skipping insertion in model container [2020-10-16 01:42:55,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 01:42:55" (3/3) ... [2020-10-16 01:42:55,839 INFO L111 eAbstractionObserver]: Analyzing ICFG safe023_tso.opt.i [2020-10-16 01:42:55,851 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 01:42:55,858 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 01:42:55,860 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 01:42:55,890 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,891 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,891 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,891 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,894 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,894 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,895 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,895 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,895 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,896 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,900 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,901 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,901 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,902 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,902 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,902 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,902 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,903 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,910 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,911 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,911 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,911 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,922 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,922 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,923 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,923 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,931 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,932 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,932 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,932 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 01:42:55,950 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-16 01:42:55,968 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 01:42:55,968 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 01:42:55,969 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 01:42:55,969 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 01:42:55,969 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 01:42:55,969 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 01:42:55,969 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 01:42:55,969 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 01:42:55,984 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 70 transitions, 155 flow [2020-10-16 01:42:56,046 INFO L129 PetriNetUnfolder]: 2/67 cut-off events. [2020-10-16 01:42:56,046 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:42:56,051 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 51 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 01:42:56,052 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 70 transitions, 155 flow [2020-10-16 01:42:56,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 56 transitions, 121 flow [2020-10-16 01:42:56,060 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 01:42:56,062 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 56 transitions, 121 flow [2020-10-16 01:42:56,065 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 56 transitions, 121 flow [2020-10-16 01:42:56,065 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 65 places, 56 transitions, 121 flow [2020-10-16 01:42:56,084 INFO L129 PetriNetUnfolder]: 1/56 cut-off events. [2020-10-16 01:42:56,084 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:42:56,085 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 48 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 01:42:56,087 INFO L117 LiptonReduction]: Number of co-enabled transitions 864 [2020-10-16 01:42:57,528 INFO L132 LiptonReduction]: Checked pairs total: 1636 [2020-10-16 01:42:57,529 INFO L134 LiptonReduction]: Total number of compositions: 42 [2020-10-16 01:42:57,531 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1473 [2020-10-16 01:42:57,540 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2020-10-16 01:42:57,540 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:42:57,541 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:57,541 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:57,542 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:57,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1555680932, now seen corresponding path program 1 times [2020-10-16 01:42:57,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:57,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680969301] [2020-10-16 01:42:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:57,774 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 01:42:57,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680969301] [2020-10-16 01:42:57,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:57,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 01:42:57,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280820025] [2020-10-16 01:42:57,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 01:42:57,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:57,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 01:42:57,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 01:42:57,812 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 112 [2020-10-16 01:42:57,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 17 transitions, 43 flow. Second operand 3 states. [2020-10-16 01:42:57,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:57,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 112 [2020-10-16 01:42:57,819 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:57,889 INFO L129 PetriNetUnfolder]: 24/77 cut-off events. [2020-10-16 01:42:57,889 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 01:42:57,892 INFO L80 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 77 events. 24/77 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 263 event pairs, 18 based on Foata normal form. 2/70 useless extension candidates. Maximal degree in co-relation 124. Up to 45 conditions per place. [2020-10-16 01:42:57,896 INFO L132 encePairwiseOnDemand]: 108/112 looper letters, 6 selfloop transitions, 3 changer transitions 0/20 dead transitions. [2020-10-16 01:42:57,896 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 20 transitions, 67 flow [2020-10-16 01:42:57,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 01:42:57,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 01:42:57,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2020-10-16 01:42:57,921 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8244047619047619 [2020-10-16 01:42:57,922 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2020-10-16 01:42:57,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2020-10-16 01:42:57,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:57,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2020-10-16 01:42:57,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 01:42:57,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 01:42:57,953 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 01:42:57,956 INFO L185 Difference]: Start difference. First operand has 27 places, 17 transitions, 43 flow. Second operand 3 states and 277 transitions. [2020-10-16 01:42:57,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 20 transitions, 67 flow [2020-10-16 01:42:57,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 20 transitions, 64 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-16 01:42:57,964 INFO L241 Difference]: Finished difference. Result has 27 places, 19 transitions, 59 flow [2020-10-16 01:42:57,967 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=27, PETRI_TRANSITIONS=19} [2020-10-16 01:42:57,968 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2020-10-16 01:42:57,969 INFO L481 AbstractCegarLoop]: Abstraction has has 27 places, 19 transitions, 59 flow [2020-10-16 01:42:57,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 01:42:57,972 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:57,972 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:57,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 01:42:57,973 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:57,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:57,973 INFO L82 PathProgramCache]: Analyzing trace with hash -981469542, now seen corresponding path program 1 times [2020-10-16 01:42:57,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:57,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600133954] [2020-10-16 01:42:57,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:58,036 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 01:42:58,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600133954] [2020-10-16 01:42:58,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:58,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:42:58,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385886480] [2020-10-16 01:42:58,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 01:42:58,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:58,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 01:42:58,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 01:42:58,042 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 112 [2020-10-16 01:42:58,042 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 19 transitions, 59 flow. Second operand 3 states. [2020-10-16 01:42:58,043 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:58,043 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 112 [2020-10-16 01:42:58,043 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:58,072 INFO L129 PetriNetUnfolder]: 16/68 cut-off events. [2020-10-16 01:42:58,072 INFO L130 PetriNetUnfolder]: For 16/51 co-relation queries the response was YES. [2020-10-16 01:42:58,073 INFO L80 FinitePrefix]: Finished finitePrefix Result has 143 conditions, 68 events. 16/68 cut-off events. For 16/51 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 270 event pairs, 6 based on Foata normal form. 7/67 useless extension candidates. Maximal degree in co-relation 133. Up to 25 conditions per place. [2020-10-16 01:42:58,074 INFO L132 encePairwiseOnDemand]: 109/112 looper letters, 7 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2020-10-16 01:42:58,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 21 transitions, 83 flow [2020-10-16 01:42:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 01:42:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 01:42:58,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2020-10-16 01:42:58,076 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8244047619047619 [2020-10-16 01:42:58,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2020-10-16 01:42:58,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2020-10-16 01:42:58,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:58,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2020-10-16 01:42:58,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 01:42:58,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 01:42:58,080 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 01:42:58,080 INFO L185 Difference]: Start difference. First operand has 27 places, 19 transitions, 59 flow. Second operand 3 states and 277 transitions. [2020-10-16 01:42:58,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 21 transitions, 83 flow [2020-10-16 01:42:58,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 21 transitions, 80 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 01:42:58,082 INFO L241 Difference]: Finished difference. Result has 29 places, 19 transitions, 67 flow [2020-10-16 01:42:58,082 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2020-10-16 01:42:58,083 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2020-10-16 01:42:58,083 INFO L481 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 67 flow [2020-10-16 01:42:58,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 01:42:58,083 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:58,084 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:58,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 01:42:58,084 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:58,085 INFO L82 PathProgramCache]: Analyzing trace with hash -999912155, now seen corresponding path program 1 times [2020-10-16 01:42:58,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:58,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071858496] [2020-10-16 01:42:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:58,174 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 01:42:58,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071858496] [2020-10-16 01:42:58,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:58,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 01:42:58,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001360367] [2020-10-16 01:42:58,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 01:42:58,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:58,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 01:42:58,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 01:42:58,177 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 112 [2020-10-16 01:42:58,177 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 19 transitions, 67 flow. Second operand 3 states. [2020-10-16 01:42:58,177 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:58,178 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 112 [2020-10-16 01:42:58,178 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:58,188 INFO L129 PetriNetUnfolder]: 0/23 cut-off events. [2020-10-16 01:42:58,189 INFO L130 PetriNetUnfolder]: For 23/35 co-relation queries the response was YES. [2020-10-16 01:42:58,189 INFO L80 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 23 events. 0/23 cut-off events. For 23/35 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 53 event pairs, 0 based on Foata normal form. 1/24 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2020-10-16 01:42:58,189 INFO L132 encePairwiseOnDemand]: 109/112 looper letters, 1 selfloop transitions, 2 changer transitions 2/19 dead transitions. [2020-10-16 01:42:58,189 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 19 transitions, 73 flow [2020-10-16 01:42:58,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 01:42:58,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 01:42:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2020-10-16 01:42:58,191 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8601190476190477 [2020-10-16 01:42:58,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2020-10-16 01:42:58,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2020-10-16 01:42:58,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:58,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2020-10-16 01:42:58,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 01:42:58,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 01:42:58,194 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 01:42:58,195 INFO L185 Difference]: Start difference. First operand has 29 places, 19 transitions, 67 flow. Second operand 3 states and 289 transitions. [2020-10-16 01:42:58,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 19 transitions, 73 flow [2020-10-16 01:42:58,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 19 transitions, 68 flow, removed 1 selfloop flow, removed 1 redundant places. [2020-10-16 01:42:58,196 INFO L241 Difference]: Finished difference. Result has 31 places, 17 transitions, 60 flow [2020-10-16 01:42:58,197 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=31, PETRI_TRANSITIONS=17} [2020-10-16 01:42:58,197 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 4 predicate places. [2020-10-16 01:42:58,197 INFO L481 AbstractCegarLoop]: Abstraction has has 31 places, 17 transitions, 60 flow [2020-10-16 01:42:58,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 01:42:58,197 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:58,197 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:58,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 01:42:58,198 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:58,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:58,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1327143987, now seen corresponding path program 1 times [2020-10-16 01:42:58,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:58,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375833258] [2020-10-16 01:42:58,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:58,259 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 01:42:58,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375833258] [2020-10-16 01:42:58,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:58,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 01:42:58,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343186209] [2020-10-16 01:42:58,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 01:42:58,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:58,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 01:42:58,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 01:42:58,262 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 112 [2020-10-16 01:42:58,263 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 17 transitions, 60 flow. Second operand 3 states. [2020-10-16 01:42:58,263 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:58,263 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 112 [2020-10-16 01:42:58,263 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:58,272 INFO L129 PetriNetUnfolder]: 0/17 cut-off events. [2020-10-16 01:42:58,272 INFO L130 PetriNetUnfolder]: For 14/16 co-relation queries the response was YES. [2020-10-16 01:42:58,272 INFO L80 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 17 events. 0/17 cut-off events. For 14/16 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 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 01:42:58,273 INFO L132 encePairwiseOnDemand]: 109/112 looper letters, 1 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2020-10-16 01:42:58,273 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 17 transitions, 66 flow [2020-10-16 01:42:58,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 01:42:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 01:42:58,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2020-10-16 01:42:58,275 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8422619047619048 [2020-10-16 01:42:58,275 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2020-10-16 01:42:58,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2020-10-16 01:42:58,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:58,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2020-10-16 01:42:58,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 01:42:58,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 01:42:58,277 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 01:42:58,277 INFO L185 Difference]: Start difference. First operand has 31 places, 17 transitions, 60 flow. Second operand 3 states and 283 transitions. [2020-10-16 01:42:58,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 17 transitions, 66 flow [2020-10-16 01:42:58,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 17 transitions, 56 flow, removed 1 selfloop flow, removed 4 redundant places. [2020-10-16 01:42:58,279 INFO L241 Difference]: Finished difference. Result has 30 places, 17 transitions, 58 flow [2020-10-16 01:42:58,279 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=50, 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=58, PETRI_PLACES=30, PETRI_TRANSITIONS=17} [2020-10-16 01:42:58,280 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2020-10-16 01:42:58,280 INFO L481 AbstractCegarLoop]: Abstraction has has 30 places, 17 transitions, 58 flow [2020-10-16 01:42:58,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 01:42:58,280 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:58,280 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:58,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 01:42:58,281 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:58,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:58,281 INFO L82 PathProgramCache]: Analyzing trace with hash 374942620, now seen corresponding path program 1 times [2020-10-16 01:42:58,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:58,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074025506] [2020-10-16 01:42:58,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:58,324 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 01:42:58,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074025506] [2020-10-16 01:42:58,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:58,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:42:58,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437471899] [2020-10-16 01:42:58,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:42:58,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:58,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:42:58,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:42:58,327 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 112 [2020-10-16 01:42:58,328 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 17 transitions, 58 flow. Second operand 4 states. [2020-10-16 01:42:58,328 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:58,328 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 112 [2020-10-16 01:42:58,328 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:58,356 INFO L129 PetriNetUnfolder]: 0/22 cut-off events. [2020-10-16 01:42:58,356 INFO L130 PetriNetUnfolder]: For 14/15 co-relation queries the response was YES. [2020-10-16 01:42:58,356 INFO L80 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 22 events. 0/22 cut-off events. For 14/15 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 2/24 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2020-10-16 01:42:58,357 INFO L132 encePairwiseOnDemand]: 108/112 looper letters, 1 selfloop transitions, 3 changer transitions 1/18 dead transitions. [2020-10-16 01:42:58,357 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 18 transitions, 73 flow [2020-10-16 01:42:58,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 01:42:58,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 01:42:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 359 transitions. [2020-10-16 01:42:58,359 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8013392857142857 [2020-10-16 01:42:58,359 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 359 transitions. [2020-10-16 01:42:58,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 359 transitions. [2020-10-16 01:42:58,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:58,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 359 transitions. [2020-10-16 01:42:58,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 01:42:58,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 01:42:58,362 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 01:42:58,362 INFO L185 Difference]: Start difference. First operand has 30 places, 17 transitions, 58 flow. Second operand 4 states and 359 transitions. [2020-10-16 01:42:58,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 18 transitions, 73 flow [2020-10-16 01:42:58,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 18 transitions, 67 flow, removed 0 selfloop flow, removed 2 redundant places. [2020-10-16 01:42:58,364 INFO L241 Difference]: Finished difference. Result has 33 places, 17 transitions, 68 flow [2020-10-16 01:42:58,364 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=54, 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=68, PETRI_PLACES=33, PETRI_TRANSITIONS=17} [2020-10-16 01:42:58,364 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2020-10-16 01:42:58,364 INFO L481 AbstractCegarLoop]: Abstraction has has 33 places, 17 transitions, 68 flow [2020-10-16 01:42:58,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:42:58,364 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:58,365 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:58,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 01:42:58,365 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:58,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:58,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1943419624, now seen corresponding path program 1 times [2020-10-16 01:42:58,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:58,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416071113] [2020-10-16 01:42:58,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:58,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:58,403 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 01:42:58,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416071113] [2020-10-16 01:42:58,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:58,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 01:42:58,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717776453] [2020-10-16 01:42:58,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:42:58,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:58,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:42:58,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:42:58,407 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 112 [2020-10-16 01:42:58,407 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 17 transitions, 68 flow. Second operand 4 states. [2020-10-16 01:42:58,407 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:58,407 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 112 [2020-10-16 01:42:58,407 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:58,432 INFO L129 PetriNetUnfolder]: 2/30 cut-off events. [2020-10-16 01:42:58,432 INFO L130 PetriNetUnfolder]: For 50/52 co-relation queries the response was YES. [2020-10-16 01:42:58,432 INFO L80 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 30 events. 2/30 cut-off events. For 50/52 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 67 event pairs, 1 based on Foata normal form. 3/32 useless extension candidates. Maximal degree in co-relation 70. Up to 7 conditions per place. [2020-10-16 01:42:58,433 INFO L132 encePairwiseOnDemand]: 109/112 looper letters, 5 selfloop transitions, 1 changer transitions 2/19 dead transitions. [2020-10-16 01:42:58,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 19 transitions, 89 flow [2020-10-16 01:42:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 01:42:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 01:42:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 353 transitions. [2020-10-16 01:42:58,435 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7879464285714286 [2020-10-16 01:42:58,435 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 353 transitions. [2020-10-16 01:42:58,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 353 transitions. [2020-10-16 01:42:58,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:58,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 353 transitions. [2020-10-16 01:42:58,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 01:42:58,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 01:42:58,438 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 01:42:58,438 INFO L185 Difference]: Start difference. First operand has 33 places, 17 transitions, 68 flow. Second operand 4 states and 353 transitions. [2020-10-16 01:42:58,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 19 transitions, 89 flow [2020-10-16 01:42:58,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 19 transitions, 73 flow, removed 3 selfloop flow, removed 5 redundant places. [2020-10-16 01:42:58,440 INFO L241 Difference]: Finished difference. Result has 33 places, 17 transitions, 59 flow [2020-10-16 01:42:58,440 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=59, PETRI_PLACES=33, PETRI_TRANSITIONS=17} [2020-10-16 01:42:58,440 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 6 predicate places. [2020-10-16 01:42:58,440 INFO L481 AbstractCegarLoop]: Abstraction has has 33 places, 17 transitions, 59 flow [2020-10-16 01:42:58,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:42:58,441 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:58,441 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:58,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 01:42:58,441 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:58,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1431069942, now seen corresponding path program 2 times [2020-10-16 01:42:58,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:58,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910561203] [2020-10-16 01:42:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:58,483 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 01:42:58,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910561203] [2020-10-16 01:42:58,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:58,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 01:42:58,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361622617] [2020-10-16 01:42:58,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:42:58,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:58,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:42:58,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:42:58,487 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 112 [2020-10-16 01:42:58,487 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 17 transitions, 59 flow. Second operand 4 states. [2020-10-16 01:42:58,487 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:58,488 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 112 [2020-10-16 01:42:58,488 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:58,538 INFO L129 PetriNetUnfolder]: 32/86 cut-off events. [2020-10-16 01:42:58,538 INFO L130 PetriNetUnfolder]: For 95/106 co-relation queries the response was YES. [2020-10-16 01:42:58,539 INFO L80 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 86 events. 32/86 cut-off events. For 95/106 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 315 event pairs, 13 based on Foata normal form. 9/88 useless extension candidates. Maximal degree in co-relation 188. Up to 54 conditions per place. [2020-10-16 01:42:58,540 INFO L132 encePairwiseOnDemand]: 106/112 looper letters, 5 selfloop transitions, 4 changer transitions 7/27 dead transitions. [2020-10-16 01:42:58,540 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 27 transitions, 111 flow [2020-10-16 01:42:58,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 01:42:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 01:42:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 423 transitions. [2020-10-16 01:42:58,542 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7553571428571428 [2020-10-16 01:42:58,543 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 423 transitions. [2020-10-16 01:42:58,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 423 transitions. [2020-10-16 01:42:58,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:58,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 423 transitions. [2020-10-16 01:42:58,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 01:42:58,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 01:42:58,546 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 01:42:58,546 INFO L185 Difference]: Start difference. First operand has 33 places, 17 transitions, 59 flow. Second operand 5 states and 423 transitions. [2020-10-16 01:42:58,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 27 transitions, 111 flow [2020-10-16 01:42:58,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 27 transitions, 108 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 01:42:58,548 INFO L241 Difference]: Finished difference. Result has 37 places, 20 transitions, 92 flow [2020-10-16 01:42:58,548 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=37, PETRI_TRANSITIONS=20} [2020-10-16 01:42:58,548 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 10 predicate places. [2020-10-16 01:42:58,548 INFO L481 AbstractCegarLoop]: Abstraction has has 37 places, 20 transitions, 92 flow [2020-10-16 01:42:58,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:42:58,549 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:58,549 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:58,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 01:42:58,549 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:58,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1936482303, now seen corresponding path program 1 times [2020-10-16 01:42:58,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:58,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317073166] [2020-10-16 01:42:58,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:58,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:58,595 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 01:42:58,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317073166] [2020-10-16 01:42:58,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:58,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 01:42:58,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506198773] [2020-10-16 01:42:58,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 01:42:58,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:58,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 01:42:58,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 01:42:58,598 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 112 [2020-10-16 01:42:58,598 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 20 transitions, 92 flow. Second operand 5 states. [2020-10-16 01:42:58,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:58,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 112 [2020-10-16 01:42:58,599 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:58,649 INFO L129 PetriNetUnfolder]: 18/63 cut-off events. [2020-10-16 01:42:58,649 INFO L130 PetriNetUnfolder]: For 129/178 co-relation queries the response was YES. [2020-10-16 01:42:58,650 INFO L80 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 63 events. 18/63 cut-off events. For 129/178 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 193 event pairs, 2 based on Foata normal form. 20/80 useless extension candidates. Maximal degree in co-relation 213. Up to 44 conditions per place. [2020-10-16 01:42:58,651 INFO L132 encePairwiseOnDemand]: 106/112 looper letters, 5 selfloop transitions, 7 changer transitions 7/30 dead transitions. [2020-10-16 01:42:58,651 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 30 transitions, 188 flow [2020-10-16 01:42:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 01:42:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 01:42:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 507 transitions. [2020-10-16 01:42:58,653 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7544642857142857 [2020-10-16 01:42:58,654 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 507 transitions. [2020-10-16 01:42:58,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 507 transitions. [2020-10-16 01:42:58,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:58,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 507 transitions. [2020-10-16 01:42:58,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 01:42:58,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 01:42:58,657 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 01:42:58,657 INFO L185 Difference]: Start difference. First operand has 37 places, 20 transitions, 92 flow. Second operand 6 states and 507 transitions. [2020-10-16 01:42:58,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 30 transitions, 188 flow [2020-10-16 01:42:58,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 30 transitions, 182 flow, removed 1 selfloop flow, removed 2 redundant places. [2020-10-16 01:42:58,660 INFO L241 Difference]: Finished difference. Result has 41 places, 23 transitions, 142 flow [2020-10-16 01:42:58,660 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=41, PETRI_TRANSITIONS=23} [2020-10-16 01:42:58,661 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 14 predicate places. [2020-10-16 01:42:58,661 INFO L481 AbstractCegarLoop]: Abstraction has has 41 places, 23 transitions, 142 flow [2020-10-16 01:42:58,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 01:42:58,661 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:58,661 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:58,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-16 01:42:58,662 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:58,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:58,662 INFO L82 PathProgramCache]: Analyzing trace with hash 868613970, now seen corresponding path program 1 times [2020-10-16 01:42:58,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:58,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201935645] [2020-10-16 01:42:58,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:58,707 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 01:42:58,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201935645] [2020-10-16 01:42:58,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:58,707 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-16 01:42:58,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134361969] [2020-10-16 01:42:58,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 01:42:58,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:58,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 01:42:58,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-16 01:42:58,710 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 112 [2020-10-16 01:42:58,710 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 23 transitions, 142 flow. Second operand 6 states. [2020-10-16 01:42:58,710 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:58,711 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 112 [2020-10-16 01:42:58,711 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:58,762 INFO L129 PetriNetUnfolder]: 8/41 cut-off events. [2020-10-16 01:42:58,763 INFO L130 PetriNetUnfolder]: For 141/185 co-relation queries the response was YES. [2020-10-16 01:42:58,763 INFO L80 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 41 events. 8/41 cut-off events. For 141/185 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 84 event pairs, 0 based on Foata normal form. 20/59 useless extension candidates. Maximal degree in co-relation 158. Up to 25 conditions per place. [2020-10-16 01:42:58,764 INFO L132 encePairwiseOnDemand]: 106/112 looper letters, 2 selfloop transitions, 10 changer transitions 4/27 dead transitions. [2020-10-16 01:42:58,764 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 27 transitions, 210 flow [2020-10-16 01:42:58,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 01:42:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 01:42:58,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 585 transitions. [2020-10-16 01:42:58,767 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7461734693877551 [2020-10-16 01:42:58,767 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 585 transitions. [2020-10-16 01:42:58,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 585 transitions. [2020-10-16 01:42:58,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:58,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 585 transitions. [2020-10-16 01:42:58,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 01:42:58,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 01:42:58,771 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 01:42:58,771 INFO L185 Difference]: Start difference. First operand has 41 places, 23 transitions, 142 flow. Second operand 7 states and 585 transitions. [2020-10-16 01:42:58,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 27 transitions, 210 flow [2020-10-16 01:42:58,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 27 transitions, 174 flow, removed 14 selfloop flow, removed 4 redundant places. [2020-10-16 01:42:58,774 INFO L241 Difference]: Finished difference. Result has 44 places, 23 transitions, 144 flow [2020-10-16 01:42:58,774 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=144, PETRI_PLACES=44, PETRI_TRANSITIONS=23} [2020-10-16 01:42:58,775 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2020-10-16 01:42:58,775 INFO L481 AbstractCegarLoop]: Abstraction has has 44 places, 23 transitions, 144 flow [2020-10-16 01:42:58,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 01:42:58,775 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 01:42:58,775 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 01:42:58,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 01:42:58,776 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 01:42:58,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 01:42:58,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1513083704, now seen corresponding path program 1 times [2020-10-16 01:42:58,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 01:42:58,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879709361] [2020-10-16 01:42:58,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 01:42:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 01:42:58,806 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 01:42:58,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879709361] [2020-10-16 01:42:58,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 01:42:58,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 01:42:58,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311028387] [2020-10-16 01:42:58,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 01:42:58,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 01:42:58,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 01:42:58,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-16 01:42:58,809 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 112 [2020-10-16 01:42:58,809 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 23 transitions, 144 flow. Second operand 4 states. [2020-10-16 01:42:58,809 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 01:42:58,809 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 112 [2020-10-16 01:42:58,809 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 01:42:58,826 INFO L129 PetriNetUnfolder]: 6/33 cut-off events. [2020-10-16 01:42:58,826 INFO L130 PetriNetUnfolder]: For 64/74 co-relation queries the response was YES. [2020-10-16 01:42:58,827 INFO L80 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 33 events. 6/33 cut-off events. For 64/74 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 53 event pairs, 0 based on Foata normal form. 2/33 useless extension candidates. Maximal degree in co-relation 106. Up to 13 conditions per place. [2020-10-16 01:42:58,827 INFO L132 encePairwiseOnDemand]: 109/112 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2020-10-16 01:42:58,827 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 22 transitions, 142 flow [2020-10-16 01:42:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 01:42:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 01:42:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 346 transitions. [2020-10-16 01:42:58,829 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7723214285714286 [2020-10-16 01:42:58,829 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 346 transitions. [2020-10-16 01:42:58,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 346 transitions. [2020-10-16 01:42:58,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 01:42:58,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 346 transitions. [2020-10-16 01:42:58,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 01:42:58,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 01:42:58,832 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 01:42:58,832 INFO L185 Difference]: Start difference. First operand has 44 places, 23 transitions, 144 flow. Second operand 4 states and 346 transitions. [2020-10-16 01:42:58,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 22 transitions, 142 flow [2020-10-16 01:42:58,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 22 transitions, 106 flow, removed 9 selfloop flow, removed 6 redundant places. [2020-10-16 01:42:58,834 INFO L241 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2020-10-16 01:42:58,834 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2020-10-16 01:42:58,834 INFO L342 CegarLoopForPetriNet]: 27 programPoint places, 11 predicate places. [2020-10-16 01:42:58,834 INFO L481 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2020-10-16 01:42:58,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 01:42:58,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 01:42:58,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 01:42:58 BasicIcfg [2020-10-16 01:42:58,839 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 01:42:58,842 INFO L168 Benchmark]: Toolchain (without parser) took 4256.02 ms. Allocated memory was 252.2 MB in the beginning and 371.7 MB in the end (delta: 119.5 MB). Free memory was 207.3 MB in the beginning and 224.5 MB in the end (delta: -17.2 MB). Peak memory consumption was 102.4 MB. Max. memory is 14.2 GB. [2020-10-16 01:42:58,842 INFO L168 Benchmark]: CDTParser took 0.21 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 01:42:58,843 INFO L168 Benchmark]: CACSL2BoogieTranslator took 764.61 ms. Allocated memory was 252.2 MB in the beginning and 316.7 MB in the end (delta: 64.5 MB). Free memory was 207.3 MB in the beginning and 270.1 MB in the end (delta: -62.8 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. [2020-10-16 01:42:58,844 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.70 ms. Allocated memory is still 316.7 MB. Free memory was 270.1 MB in the beginning and 267.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 01:42:58,845 INFO L168 Benchmark]: Boogie Preprocessor took 25.76 ms. Allocated memory is still 316.7 MB. Free memory was 267.6 MB in the beginning and 265.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 01:42:58,846 INFO L168 Benchmark]: RCFGBuilder took 404.19 ms. Allocated memory is still 316.7 MB. Free memory was 265.0 MB in the beginning and 243.2 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-16 01:42:58,847 INFO L168 Benchmark]: TraceAbstraction took 3007.17 ms. Allocated memory was 316.7 MB in the beginning and 371.7 MB in the end (delta: 55.1 MB). Free memory was 243.2 MB in the beginning and 224.5 MB in the end (delta: 18.7 MB). Peak memory consumption was 73.8 MB. Max. memory is 14.2 GB. [2020-10-16 01:42:58,850 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 252.2 MB. Free memory is still 228.6 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 764.61 ms. Allocated memory was 252.2 MB in the beginning and 316.7 MB in the end (delta: 64.5 MB). Free memory was 207.3 MB in the beginning and 270.1 MB in the end (delta: -62.8 MB). Peak memory consumption was 26.9 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 48.70 ms. Allocated memory is still 316.7 MB. Free memory was 270.1 MB in the beginning and 267.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 25.76 ms. Allocated memory is still 316.7 MB. Free memory was 267.6 MB in the beginning and 265.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * RCFGBuilder took 404.19 ms. Allocated memory is still 316.7 MB. Free memory was 265.0 MB in the beginning and 243.2 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 3007.17 ms. Allocated memory was 316.7 MB in the beginning and 371.7 MB in the end (delta: 55.1 MB). Free memory was 243.2 MB in the beginning and 224.5 MB in the end (delta: 18.7 MB). Peak memory consumption was 73.8 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 620 VarBasedMoverChecksPositive, 54 VarBasedMoverChecksNegative, 12 SemBasedMoverChecksPositive, 42 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 86 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.4s, 65 PlacesBefore, 27 PlacesAfterwards, 56 TransitionsBefore, 17 TransitionsAfterwards, 864 CoEnabledTransitionPairs, 5 FixpointIterations, 14 TrivialSequentialCompositions, 23 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 1 ChoiceCompositions, 42 TotalNumberOfCompositions, 1636 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: 2.8s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 39 SDtfs, 18 SDslu, 14 SDs, 0 SdLazy, 117 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=9, 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, 121 NumberOfCodeBlocks, 121 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 111 ConstructedInterpolants, 0 QuantifiedInterpolants, 3385 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 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...