/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 20:22:35,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 20:22:35,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 20:22:35,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 20:22:35,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 20:22:35,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 20:22:35,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 20:22:35,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 20:22:35,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 20:22:35,537 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 20:22:35,538 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 20:22:35,539 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 20:22:35,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 20:22:35,541 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 20:22:35,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 20:22:35,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 20:22:35,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 20:22:35,546 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 20:22:35,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 20:22:35,555 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 20:22:35,556 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 20:22:35,557 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 20:22:35,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 20:22:35,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 20:22:35,563 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-11 20:22:35,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-11 20:22:35,564 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-11 20:22:35,565 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-11 20:22:35,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-11 20:22:35,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-11 20:22:35,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 20:22:35,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 20:22:35,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 20:22:35,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 20:22:35,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 20:22:35,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 20:22:35,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 20:22:35,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 20:22:35,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 20:22:35,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 20:22:35,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 20:22:35,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2021-03-11 20:22:35,600 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 20:22:35,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 20:22:35,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 20:22:35,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 20:22:35,603 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 20:22:35,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 20:22:35,603 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 20:22:35,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 20:22:35,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 20:22:35,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 20:22:35,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 20:22:35,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 20:22:35,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 20:22:35,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 20:22:35,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 20:22:35,605 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 20:22:35,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 20:22:35,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 20:22:35,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 20:22:35,605 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 20:22:35,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 20:22:35,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 20:22:35,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 20:22:35,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 20:22:35,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 20:22:35,606 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 20:22:35,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 20:22:35,606 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 20:22:35,606 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 20:22:35,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 20:22:35,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 20:22:35,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 20:22:35,889 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-11 20:22:35,890 INFO L275 PluginConnector]: CDTParser initialized [2021-03-11 20:22:35,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe010_tso.oepc.i [2021-03-11 20:22:35,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a8deb94/fbf1e613af7d4c2f9b7693ab63fae4de/FLAGe85702a1e [2021-03-11 20:22:36,327 INFO L306 CDTParser]: Found 1 translation units. [2021-03-11 20:22:36,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe010_tso.oepc.i [2021-03-11 20:22:36,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a8deb94/fbf1e613af7d4c2f9b7693ab63fae4de/FLAGe85702a1e [2021-03-11 20:22:36,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/63a8deb94/fbf1e613af7d4c2f9b7693ab63fae4de [2021-03-11 20:22:36,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 20:22:36,740 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-11 20:22:36,741 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-11 20:22:36,741 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-11 20:22:36,743 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-11 20:22:36,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:22:36" (1/1) ... [2021-03-11 20:22:36,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f57ce6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:22:36, skipping insertion in model container [2021-03-11 20:22:36,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:22:36" (1/1) ... [2021-03-11 20:22:36,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-11 20:22:36,770 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-11 20:22:36,889 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe010_tso.oepc.i[950,963] [2021-03-11 20:22:37,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:22:37,032 INFO L203 MainTranslator]: Completed pre-run [2021-03-11 20:22:37,041 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe010_tso.oepc.i[950,963] [2021-03-11 20:22:37,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:22:37,120 INFO L208 MainTranslator]: Completed translation [2021-03-11 20:22:37,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:22:37 WrapperNode [2021-03-11 20:22:37,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-11 20:22:37,122 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 20:22:37,122 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 20:22:37,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 20:22:37,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:22:37" (1/1) ... [2021-03-11 20:22:37,152 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:22:37" (1/1) ... [2021-03-11 20:22:37,165 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 20:22:37,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 20:22:37,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 20:22:37,166 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 20:22:37,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:22:37" (1/1) ... [2021-03-11 20:22:37,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:22:37" (1/1) ... [2021-03-11 20:22:37,175 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:22:37" (1/1) ... [2021-03-11 20:22:37,176 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:22:37" (1/1) ... [2021-03-11 20:22:37,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:22:37" (1/1) ... [2021-03-11 20:22:37,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:22:37" (1/1) ... [2021-03-11 20:22:37,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:22:37" (1/1) ... [2021-03-11 20:22:37,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 20:22:37,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 20:22:37,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 20:22:37,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 20:22:37,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:22:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 20:22:37,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-11 20:22:37,283 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-11 20:22:37,283 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-11 20:22:37,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-11 20:22:37,284 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-11 20:22:37,284 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-11 20:22:37,284 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-11 20:22:37,284 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-11 20:22:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-11 20:22:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-11 20:22:37,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 20:22:37,285 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 20:22:37,286 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 20:22:37,597 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 20:22:37,598 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-11 20:22:37,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:22:37 BoogieIcfgContainer [2021-03-11 20:22:37,600 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 20:22:37,601 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 20:22:37,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 20:22:37,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 20:22:37,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.03 08:22:36" (1/3) ... [2021-03-11 20:22:37,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd0abfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:22:37, skipping insertion in model container [2021-03-11 20:22:37,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:22:37" (2/3) ... [2021-03-11 20:22:37,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd0abfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:22:37, skipping insertion in model container [2021-03-11 20:22:37,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:22:37" (3/3) ... [2021-03-11 20:22:37,605 INFO L111 eAbstractionObserver]: Analyzing ICFG safe010_tso.oepc.i [2021-03-11 20:22:37,609 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 20:22:37,612 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 20:22:37,613 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 20:22:37,634 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,634 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,634 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,634 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,634 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,634 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,634 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,635 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,635 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,635 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,635 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,635 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,636 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,636 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,636 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,637 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,637 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,637 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,637 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,637 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,638 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,638 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,638 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,638 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,640 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,640 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,640 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,640 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,644 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,644 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,644 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,644 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:22:37,646 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 20:22:37,658 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 20:22:37,680 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 20:22:37,680 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 20:22:37,681 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 20:22:37,681 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 20:22:37,681 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 20:22:37,681 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 20:22:37,681 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 20:22:37,681 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 20:22:37,688 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 60 transitions, 130 flow [2021-03-11 20:22:37,707 INFO L129 PetriNetUnfolder]: 2/58 cut-off events. [2021-03-11 20:22:37,707 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:22:37,709 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 58 events. 2/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2021-03-11 20:22:37,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 60 transitions, 130 flow [2021-03-11 20:22:37,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 48 transitions, 102 flow [2021-03-11 20:22:37,714 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 20:22:37,721 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 54 places, 48 transitions, 102 flow [2021-03-11 20:22:37,723 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 54 places, 48 transitions, 102 flow [2021-03-11 20:22:37,723 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 54 places, 48 transitions, 102 flow [2021-03-11 20:22:37,731 INFO L129 PetriNetUnfolder]: 1/48 cut-off events. [2021-03-11 20:22:37,731 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:22:37,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 48 events. 1/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 28 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2021-03-11 20:22:37,732 INFO L116 LiptonReduction]: Number of co-enabled transitions 456 [2021-03-11 20:22:39,122 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-03-11 20:22:39,298 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-03-11 20:22:39,357 INFO L131 LiptonReduction]: Checked pairs total: 920 [2021-03-11 20:22:39,358 INFO L133 LiptonReduction]: Total number of compositions: 41 [2021-03-11 20:22:39,359 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1647 [2021-03-11 20:22:39,368 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-03-11 20:22:39,368 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:22:39,368 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:22:39,369 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-03-11 20:22:39,369 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:22:39,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:22:39,372 INFO L82 PathProgramCache]: Analyzing trace with hash 202058649, now seen corresponding path program 1 times [2021-03-11 20:22:39,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:22:39,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403742107] [2021-03-11 20:22:39,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:22:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:22:39,471 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:22:39,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:22:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:22:39,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403742107] [2021-03-11 20:22:39,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:22:39,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:22:39,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611580895] [2021-03-11 20:22:39,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-03-11 20:22:39,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:22:39,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-03-11 20:22:39,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-03-11 20:22:39,489 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 101 [2021-03-11 20:22:39,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 13 transitions, 32 flow. Second operand has 2 states, 2 states have (on average 93.5) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:22:39,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 101 [2021-03-11 20:22:39,491 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:22:39,496 INFO L129 PetriNetUnfolder]: 0/12 cut-off events. [2021-03-11 20:22:39,496 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:22:39,496 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 12 events. 0/12 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 1/13 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2021-03-11 20:22:39,497 INFO L132 encePairwiseOnDemand]: 100/101 looper letters, 0 selfloop transitions, 0 changer transitions 0/12 dead transitions. [2021-03-11 20:22:39,497 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 12 transitions, 30 flow [2021-03-11 20:22:39,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-03-11 20:22:39,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2021-03-11 20:22:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 187 transitions. [2021-03-11 20:22:39,504 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.9257425742574258 [2021-03-11 20:22:39,505 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 187 transitions. [2021-03-11 20:22:39,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 187 transitions. [2021-03-11 20:22:39,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:22:39,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 187 transitions. [2021-03-11 20:22:39,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 93.5) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,513 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,514 INFO L185 Difference]: Start difference. First operand has 19 places, 13 transitions, 32 flow. Second operand 2 states and 187 transitions. [2021-03-11 20:22:39,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 12 transitions, 30 flow [2021-03-11 20:22:39,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 12 transitions, 28 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:22:39,516 INFO L241 Difference]: Finished difference. Result has 18 places, 12 transitions, 28 flow [2021-03-11 20:22:39,518 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=28, PETRI_PLACES=18, PETRI_TRANSITIONS=12} [2021-03-11 20:22:39,518 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2021-03-11 20:22:39,518 INFO L480 AbstractCegarLoop]: Abstraction has has 18 places, 12 transitions, 28 flow [2021-03-11 20:22:39,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 93.5) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,519 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:22:39,519 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 20:22:39,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 20:22:39,519 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:22:39,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:22:39,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1968850909, now seen corresponding path program 1 times [2021-03-11 20:22:39,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:22:39,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841462407] [2021-03-11 20:22:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:22:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:22:39,625 INFO L142 QuantifierPusher]: treesize reduction 3, result has 75.0 percent of original size [2021-03-11 20:22:39,627 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 20:22:39,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:22:39,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841462407] [2021-03-11 20:22:39,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:22:39,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:22:39,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536269055] [2021-03-11 20:22:39,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:22:39,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:22:39,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:22:39,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:22:39,636 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 101 [2021-03-11 20:22:39,636 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 12 transitions, 28 flow. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,636 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:22:39,636 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 101 [2021-03-11 20:22:39,636 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:22:39,648 INFO L129 PetriNetUnfolder]: 4/29 cut-off events. [2021-03-11 20:22:39,648 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:22:39,649 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 29 events. 4/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 73 event pairs, 2 based on Foata normal form. 3/31 useless extension candidates. Maximal degree in co-relation 50. Up to 13 conditions per place. [2021-03-11 20:22:39,649 INFO L132 encePairwiseOnDemand]: 96/101 looper letters, 3 selfloop transitions, 4 changer transitions 0/14 dead transitions. [2021-03-11 20:22:39,649 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 14 transitions, 46 flow [2021-03-11 20:22:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:22:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:22:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2021-03-11 20:22:39,651 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7491749174917491 [2021-03-11 20:22:39,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2021-03-11 20:22:39,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2021-03-11 20:22:39,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:22:39,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2021-03-11 20:22:39,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,654 INFO L185 Difference]: Start difference. First operand has 18 places, 12 transitions, 28 flow. Second operand 3 states and 227 transitions. [2021-03-11 20:22:39,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 14 transitions, 46 flow [2021-03-11 20:22:39,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 14 transitions, 46 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 20:22:39,655 INFO L241 Difference]: Finished difference. Result has 21 places, 14 transitions, 50 flow [2021-03-11 20:22:39,655 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=21, PETRI_TRANSITIONS=14} [2021-03-11 20:22:39,655 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 2 predicate places. [2021-03-11 20:22:39,655 INFO L480 AbstractCegarLoop]: Abstraction has has 21 places, 14 transitions, 50 flow [2021-03-11 20:22:39,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,655 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:22:39,655 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:22:39,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 20:22:39,656 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:22:39,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:22:39,656 INFO L82 PathProgramCache]: Analyzing trace with hash 904835377, now seen corresponding path program 1 times [2021-03-11 20:22:39,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:22:39,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340693708] [2021-03-11 20:22:39,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:22:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:22:39,694 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:22:39,695 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:22:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:22:39,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340693708] [2021-03-11 20:22:39,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:22:39,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:22:39,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334687813] [2021-03-11 20:22:39,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:22:39,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:22:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:22:39,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:22:39,700 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 101 [2021-03-11 20:22:39,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 14 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:22:39,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 101 [2021-03-11 20:22:39,701 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:22:39,709 INFO L129 PetriNetUnfolder]: 3/27 cut-off events. [2021-03-11 20:22:39,709 INFO L130 PetriNetUnfolder]: For 7/9 co-relation queries the response was YES. [2021-03-11 20:22:39,710 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 27 events. 3/27 cut-off events. For 7/9 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 60 event pairs, 1 based on Foata normal form. 1/28 useless extension candidates. Maximal degree in co-relation 56. Up to 11 conditions per place. [2021-03-11 20:22:39,711 INFO L132 encePairwiseOnDemand]: 98/101 looper letters, 1 selfloop transitions, 3 changer transitions 0/14 dead transitions. [2021-03-11 20:22:39,711 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 14 transitions, 58 flow [2021-03-11 20:22:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:22:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:22:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 244 transitions. [2021-03-11 20:22:39,714 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8052805280528053 [2021-03-11 20:22:39,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 244 transitions. [2021-03-11 20:22:39,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 244 transitions. [2021-03-11 20:22:39,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:22:39,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 244 transitions. [2021-03-11 20:22:39,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,718 INFO L185 Difference]: Start difference. First operand has 21 places, 14 transitions, 50 flow. Second operand 3 states and 244 transitions. [2021-03-11 20:22:39,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 14 transitions, 58 flow [2021-03-11 20:22:39,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 14 transitions, 54 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:22:39,719 INFO L241 Difference]: Finished difference. Result has 23 places, 14 transitions, 57 flow [2021-03-11 20:22:39,719 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=23, PETRI_TRANSITIONS=14} [2021-03-11 20:22:39,719 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2021-03-11 20:22:39,719 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 14 transitions, 57 flow [2021-03-11 20:22:39,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,720 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:22:39,720 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:22:39,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 20:22:39,720 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:22:39,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:22:39,720 INFO L82 PathProgramCache]: Analyzing trace with hash 904809368, now seen corresponding path program 1 times [2021-03-11 20:22:39,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:22:39,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760411506] [2021-03-11 20:22:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:22:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:22:39,765 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:22:39,766 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-03-11 20:22:39,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:22:39,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-03-11 20:22:39,781 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:22:39,782 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 20:22:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:22:39,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760411506] [2021-03-11 20:22:39,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:22:39,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:22:39,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324257803] [2021-03-11 20:22:39,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:22:39,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:22:39,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:22:39,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:22:39,785 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 101 [2021-03-11 20:22:39,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 14 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:22:39,786 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 101 [2021-03-11 20:22:39,786 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:22:39,827 INFO L129 PetriNetUnfolder]: 34/82 cut-off events. [2021-03-11 20:22:39,828 INFO L130 PetriNetUnfolder]: For 31/33 co-relation queries the response was YES. [2021-03-11 20:22:39,829 INFO L84 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 82 events. 34/82 cut-off events. For 31/33 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 276 event pairs, 11 based on Foata normal form. 3/85 useless extension candidates. Maximal degree in co-relation 210. Up to 44 conditions per place. [2021-03-11 20:22:39,829 INFO L132 encePairwiseOnDemand]: 97/101 looper letters, 10 selfloop transitions, 6 changer transitions 0/20 dead transitions. [2021-03-11 20:22:39,829 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 20 transitions, 105 flow [2021-03-11 20:22:39,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:22:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:22:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 268 transitions. [2021-03-11 20:22:39,831 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6633663366336634 [2021-03-11 20:22:39,831 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 268 transitions. [2021-03-11 20:22:39,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 268 transitions. [2021-03-11 20:22:39,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:22:39,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 268 transitions. [2021-03-11 20:22:39,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.0) internal successors, (268), 4 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,833 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 101.0) internal successors, (505), 5 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,833 INFO L185 Difference]: Start difference. First operand has 23 places, 14 transitions, 57 flow. Second operand 4 states and 268 transitions. [2021-03-11 20:22:39,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 20 transitions, 105 flow [2021-03-11 20:22:39,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 20 transitions, 99 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:22:39,834 INFO L241 Difference]: Finished difference. Result has 25 places, 16 transitions, 77 flow [2021-03-11 20:22:39,834 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=77, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2021-03-11 20:22:39,835 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 6 predicate places. [2021-03-11 20:22:39,835 INFO L480 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 77 flow [2021-03-11 20:22:39,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,835 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:22:39,835 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:22:39,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 20:22:39,836 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:22:39,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:22:39,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2015711082, now seen corresponding path program 1 times [2021-03-11 20:22:39,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:22:39,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621447406] [2021-03-11 20:22:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:22:39,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:22:39,871 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:22:39,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:22:39,876 INFO L142 QuantifierPusher]: treesize reduction 3, result has 75.0 percent of original size [2021-03-11 20:22:39,877 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 20:22:39,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:22:39,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621447406] [2021-03-11 20:22:39,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:22:39,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:22:39,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554492537] [2021-03-11 20:22:39,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:22:39,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:22:39,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:22:39,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:22:39,883 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 101 [2021-03-11 20:22:39,883 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,883 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:22:39,883 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 101 [2021-03-11 20:22:39,883 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:22:39,910 INFO L129 PetriNetUnfolder]: 7/39 cut-off events. [2021-03-11 20:22:39,910 INFO L130 PetriNetUnfolder]: For 37/47 co-relation queries the response was YES. [2021-03-11 20:22:39,910 INFO L84 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 39 events. 7/39 cut-off events. For 37/47 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 110 event pairs, 0 based on Foata normal form. 7/46 useless extension candidates. Maximal degree in co-relation 112. Up to 11 conditions per place. [2021-03-11 20:22:39,911 INFO L132 encePairwiseOnDemand]: 95/101 looper letters, 5 selfloop transitions, 8 changer transitions 3/22 dead transitions. [2021-03-11 20:22:39,911 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 142 flow [2021-03-11 20:22:39,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:22:39,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:22:39,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 370 transitions. [2021-03-11 20:22:39,912 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7326732673267327 [2021-03-11 20:22:39,912 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 370 transitions. [2021-03-11 20:22:39,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 370 transitions. [2021-03-11 20:22:39,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:22:39,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 370 transitions. [2021-03-11 20:22:39,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 74.0) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,914 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,914 INFO L185 Difference]: Start difference. First operand has 25 places, 16 transitions, 77 flow. Second operand 5 states and 370 transitions. [2021-03-11 20:22:39,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 142 flow [2021-03-11 20:22:39,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 22 transitions, 142 flow, removed 0 selfloop flow, removed 0 redundant places. [2021-03-11 20:22:39,915 INFO L241 Difference]: Finished difference. Result has 32 places, 18 transitions, 120 flow [2021-03-11 20:22:39,915 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=32, PETRI_TRANSITIONS=18} [2021-03-11 20:22:39,915 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 13 predicate places. [2021-03-11 20:22:39,916 INFO L480 AbstractCegarLoop]: Abstraction has has 32 places, 18 transitions, 120 flow [2021-03-11 20:22:39,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,920 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:22:39,920 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:22:39,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 20:22:39,920 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:22:39,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:22:39,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2015708292, now seen corresponding path program 2 times [2021-03-11 20:22:39,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:22:39,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214177779] [2021-03-11 20:22:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:22:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:22:39,936 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:22:39,936 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:22:39,938 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:22:39,938 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:22:39,942 INFO L142 QuantifierPusher]: treesize reduction 3, result has 75.0 percent of original size [2021-03-11 20:22:39,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 20:22:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:22:39,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214177779] [2021-03-11 20:22:39,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:22:39,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:22:39,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829412064] [2021-03-11 20:22:39,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:22:39,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:22:39,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:22:39,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:22:39,949 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 101 [2021-03-11 20:22:39,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 18 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:22:39,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 101 [2021-03-11 20:22:39,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:22:39,969 INFO L129 PetriNetUnfolder]: 1/28 cut-off events. [2021-03-11 20:22:39,969 INFO L130 PetriNetUnfolder]: For 95/110 co-relation queries the response was YES. [2021-03-11 20:22:39,969 INFO L84 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 28 events. 1/28 cut-off events. For 95/110 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 70 event pairs, 0 based on Foata normal form. 8/36 useless extension candidates. Maximal degree in co-relation 99. Up to 7 conditions per place. [2021-03-11 20:22:39,969 INFO L132 encePairwiseOnDemand]: 96/101 looper letters, 2 selfloop transitions, 4 changer transitions 7/19 dead transitions. [2021-03-11 20:22:39,969 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 19 transitions, 155 flow [2021-03-11 20:22:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:22:39,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:22:39,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 366 transitions. [2021-03-11 20:22:39,972 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7247524752475247 [2021-03-11 20:22:39,972 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 366 transitions. [2021-03-11 20:22:39,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 366 transitions. [2021-03-11 20:22:39,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:22:39,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 366 transitions. [2021-03-11 20:22:39,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 73.2) internal successors, (366), 5 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,974 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,974 INFO L185 Difference]: Start difference. First operand has 32 places, 18 transitions, 120 flow. Second operand 5 states and 366 transitions. [2021-03-11 20:22:39,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 19 transitions, 155 flow [2021-03-11 20:22:39,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 19 transitions, 137 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-03-11 20:22:39,975 INFO L241 Difference]: Finished difference. Result has 35 places, 12 transitions, 77 flow [2021-03-11 20:22:39,975 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=12} [2021-03-11 20:22:39,976 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 16 predicate places. [2021-03-11 20:22:39,976 INFO L480 AbstractCegarLoop]: Abstraction has has 35 places, 12 transitions, 77 flow [2021-03-11 20:22:39,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:39,976 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:22:39,976 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:22:39,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 20:22:39,976 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:22:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:22:39,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2050978260, now seen corresponding path program 1 times [2021-03-11 20:22:39,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:22:39,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854803452] [2021-03-11 20:22:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:22:39,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:22:39,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:22:40,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:22:40,002 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:22:40,003 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 20:22:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:22:40,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854803452] [2021-03-11 20:22:40,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:22:40,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:22:40,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660871096] [2021-03-11 20:22:40,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:22:40,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:22:40,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:22:40,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:22:40,010 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 101 [2021-03-11 20:22:40,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 12 transitions, 77 flow. Second operand has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:40,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:22:40,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 101 [2021-03-11 20:22:40,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:22:40,032 INFO L129 PetriNetUnfolder]: 4/25 cut-off events. [2021-03-11 20:22:40,032 INFO L130 PetriNetUnfolder]: For 49/54 co-relation queries the response was YES. [2021-03-11 20:22:40,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 25 events. 4/25 cut-off events. For 49/54 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 48 event pairs, 1 based on Foata normal form. 4/28 useless extension candidates. Maximal degree in co-relation 75. Up to 12 conditions per place. [2021-03-11 20:22:40,033 INFO L132 encePairwiseOnDemand]: 96/101 looper letters, 3 selfloop transitions, 2 changer transitions 7/19 dead transitions. [2021-03-11 20:22:40,033 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 19 transitions, 115 flow [2021-03-11 20:22:40,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:22:40,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:22:40,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 379 transitions. [2021-03-11 20:22:40,034 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7504950495049505 [2021-03-11 20:22:40,034 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 379 transitions. [2021-03-11 20:22:40,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 379 transitions. [2021-03-11 20:22:40,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:22:40,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 379 transitions. [2021-03-11 20:22:40,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 75.8) internal successors, (379), 5 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:40,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:40,036 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:40,036 INFO L185 Difference]: Start difference. First operand has 35 places, 12 transitions, 77 flow. Second operand 5 states and 379 transitions. [2021-03-11 20:22:40,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 19 transitions, 115 flow [2021-03-11 20:22:40,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 19 transitions, 80 flow, removed 5 selfloop flow, removed 11 redundant places. [2021-03-11 20:22:40,038 INFO L241 Difference]: Finished difference. Result has 31 places, 12 transitions, 58 flow [2021-03-11 20:22:40,038 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=12} [2021-03-11 20:22:40,038 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 12 predicate places. [2021-03-11 20:22:40,038 INFO L480 AbstractCegarLoop]: Abstraction has has 31 places, 12 transitions, 58 flow [2021-03-11 20:22:40,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 73.75) internal successors, (295), 4 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:40,039 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:22:40,039 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:22:40,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 20:22:40,039 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:22:40,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:22:40,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1220562888, now seen corresponding path program 1 times [2021-03-11 20:22:40,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:22:40,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428594984] [2021-03-11 20:22:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:22:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:22:40,073 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:22:40,073 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:22:40,075 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:22:40,075 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:22:40,078 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:22:40,079 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 20:22:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:22:40,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428594984] [2021-03-11 20:22:40,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:22:40,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:22:40,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87073323] [2021-03-11 20:22:40,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:22:40,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:22:40,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:22:40,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:22:40,085 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 101 [2021-03-11 20:22:40,086 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 12 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:40,086 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:22:40,086 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 101 [2021-03-11 20:22:40,086 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:22:40,101 INFO L129 PetriNetUnfolder]: 0/13 cut-off events. [2021-03-11 20:22:40,101 INFO L130 PetriNetUnfolder]: For 13/17 co-relation queries the response was YES. [2021-03-11 20:22:40,101 INFO L84 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 13 events. 0/13 cut-off events. For 13/17 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 2/15 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-03-11 20:22:40,101 INFO L132 encePairwiseOnDemand]: 96/101 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2021-03-11 20:22:40,101 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 13 transitions, 70 flow [2021-03-11 20:22:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 20:22:40,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 20:22:40,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 445 transitions. [2021-03-11 20:22:40,102 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7343234323432343 [2021-03-11 20:22:40,102 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 445 transitions. [2021-03-11 20:22:40,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 445 transitions. [2021-03-11 20:22:40,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:22:40,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 445 transitions. [2021-03-11 20:22:40,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 74.16666666666667) internal successors, (445), 6 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:40,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:40,104 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 101.0) internal successors, (707), 7 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:40,104 INFO L185 Difference]: Start difference. First operand has 31 places, 12 transitions, 58 flow. Second operand 6 states and 445 transitions. [2021-03-11 20:22:40,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 13 transitions, 70 flow [2021-03-11 20:22:40,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 13 transitions, 57 flow, removed 2 selfloop flow, removed 5 redundant places. [2021-03-11 20:22:40,105 INFO L241 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2021-03-11 20:22:40,105 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=101, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2021-03-11 20:22:40,105 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 9 predicate places. [2021-03-11 20:22:40,105 INFO L480 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2021-03-11 20:22:40,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 73.8) internal successors, (369), 5 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:22:40,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 20:22:40,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 08:22:40 BasicIcfg [2021-03-11 20:22:40,108 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 20:22:40,109 INFO L168 Benchmark]: Toolchain (without parser) took 3371.38 ms. Allocated memory was 255.9 MB in the beginning and 446.7 MB in the end (delta: 190.8 MB). Free memory was 234.5 MB in the beginning and 298.2 MB in the end (delta: -63.7 MB). Peak memory consumption was 126.8 MB. Max. memory is 16.0 GB. [2021-03-11 20:22:40,109 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 20:22:40,110 INFO L168 Benchmark]: CACSL2BoogieTranslator took 380.43 ms. Allocated memory was 255.9 MB in the beginning and 371.2 MB in the end (delta: 115.3 MB). Free memory was 233.9 MB in the beginning and 333.6 MB in the end (delta: -99.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-11 20:22:40,110 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.64 ms. Allocated memory is still 371.2 MB. Free memory was 333.6 MB in the beginning and 332.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:22:40,110 INFO L168 Benchmark]: Boogie Preprocessor took 32.29 ms. Allocated memory is still 371.2 MB. Free memory was 332.1 MB in the beginning and 330.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:22:40,111 INFO L168 Benchmark]: RCFGBuilder took 400.78 ms. Allocated memory is still 371.2 MB. Free memory was 330.7 MB in the beginning and 310.5 MB in the end (delta: 20.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2021-03-11 20:22:40,111 INFO L168 Benchmark]: TraceAbstraction took 2507.67 ms. Allocated memory was 371.2 MB in the beginning and 446.7 MB in the end (delta: 75.5 MB). Free memory was 310.5 MB in the beginning and 298.2 MB in the end (delta: 12.3 MB). Peak memory consumption was 91.0 MB. Max. memory is 16.0 GB. [2021-03-11 20:22:40,113 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 380.43 ms. Allocated memory was 255.9 MB in the beginning and 371.2 MB in the end (delta: 115.3 MB). Free memory was 233.9 MB in the beginning and 333.6 MB in the end (delta: -99.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 43.64 ms. Allocated memory is still 371.2 MB. Free memory was 333.6 MB in the beginning and 332.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 32.29 ms. Allocated memory is still 371.2 MB. Free memory was 332.1 MB in the beginning and 330.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 400.78 ms. Allocated memory is still 371.2 MB. Free memory was 330.7 MB in the beginning and 310.5 MB in the end (delta: 20.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2507.67 ms. Allocated memory was 371.2 MB in the beginning and 446.7 MB in the end (delta: 75.5 MB). Free memory was 310.5 MB in the beginning and 298.2 MB in the end (delta: 12.3 MB). Peak memory consumption was 91.0 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1635.3ms, 54 PlacesBefore, 19 PlacesAfterwards, 48 TransitionsBefore, 13 TransitionsAfterwards, 456 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 41 TotalNumberOfCompositions, 920 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 514, positive: 456, positive conditional: 0, positive unconditional: 456, negative: 58, negative conditional: 0, negative unconditional: 58, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 323, positive: 301, positive conditional: 0, positive unconditional: 301, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 323, positive: 298, positive conditional: 0, positive unconditional: 298, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 25, positive: 3, positive conditional: 0, positive unconditional: 3, negative: 22, negative conditional: 0, negative unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 87, positive: 20, positive conditional: 0, positive unconditional: 20, negative: 67, negative conditional: 0, negative unconditional: 67, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 514, positive: 155, positive conditional: 0, positive unconditional: 155, negative: 36, negative conditional: 0, negative unconditional: 36, unknown: 323, unknown conditional: 0, unknown unconditional: 323] , Statistics on independence cache: Total cache size (in pairs): 35, Positive cache size: 28, Positive conditional cache size: 0, Positive unconditional cache size: 28, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.9ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2428.7ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 234.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1685.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 32 SDtfs, 19 SDslu, 16 SDs, 0 SdLazy, 58 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 49.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 68.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=5, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.4ms SsaConstructionTime, 114.7ms SatisfiabilityAnalysisTime, 257.8ms InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 244 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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...