/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/safe006_pso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 20:21:02,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 20:21:02,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 20:21:02,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 20:21:02,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 20:21:02,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 20:21:02,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 20:21:02,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 20:21:02,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 20:21:02,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 20:21:02,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 20:21:02,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 20:21:02,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 20:21:02,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 20:21:02,746 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 20:21:02,747 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 20:21:02,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 20:21:02,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 20:21:02,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 20:21:02,750 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 20:21:02,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 20:21:02,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 20:21:02,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 20:21:02,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 20:21:02,762 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 20:21:02,764 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 20:21:02,764 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 20:21:02,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 20:21:02,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 20:21:02,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 20:21:02,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 20:21:02,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 20:21:02,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 20:21:02,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 20:21:02,768 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 20:21:02,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 20:21:02,773 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 20:21:02,795 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 20:21:02,795 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 20:21:02,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 20:21:02,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 20:21:02,796 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 20:21:02,796 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 20:21:02,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 20:21:02,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 20:21:02,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 20:21:02,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 20:21:02,797 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 20:21:02,797 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 20:21:02,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 20:21:02,797 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 20:21:02,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 20:21:02,797 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 20:21:02,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 20:21:02,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 20:21:02,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 20:21:02,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 20:21:02,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 20:21:02,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 20:21:02,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 20:21:02,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 20:21:02,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 20:21:02,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 20:21:02,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 20:21:02,799 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 20:21:02,799 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 20:21:03,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 20:21:03,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 20:21:03,061 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 20:21:03,062 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-11 20:21:03,063 INFO L275 PluginConnector]: CDTParser initialized [2021-03-11 20:21:03,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe006_pso.opt.i [2021-03-11 20:21:03,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/156445284/f33276102dde46e298510984d5d01172/FLAGe71a26a85 [2021-03-11 20:21:03,570 INFO L306 CDTParser]: Found 1 translation units. [2021-03-11 20:21:03,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe006_pso.opt.i [2021-03-11 20:21:03,582 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/156445284/f33276102dde46e298510984d5d01172/FLAGe71a26a85 [2021-03-11 20:21:03,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/156445284/f33276102dde46e298510984d5d01172 [2021-03-11 20:21:03,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 20:21:03,920 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-11 20:21:03,923 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-11 20:21:03,923 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-11 20:21:03,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-11 20:21:03,926 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:21:03" (1/1) ... [2021-03-11 20:21:03,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bf834f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:21:03, skipping insertion in model container [2021-03-11 20:21:03,927 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:21:03" (1/1) ... [2021-03-11 20:21:03,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-11 20:21:03,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-11 20:21:04,139 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/safe006_pso.opt.i[949,962] [2021-03-11 20:21:04,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:21:04,271 INFO L203 MainTranslator]: Completed pre-run [2021-03-11 20:21:04,279 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/safe006_pso.opt.i[949,962] [2021-03-11 20:21:04,308 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:21:04,353 INFO L208 MainTranslator]: Completed translation [2021-03-11 20:21:04,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:21:04 WrapperNode [2021-03-11 20:21:04,357 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-11 20:21:04,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 20:21:04,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 20:21:04,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 20:21:04,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:21:04" (1/1) ... [2021-03-11 20:21:04,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:21:04" (1/1) ... [2021-03-11 20:21:04,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 20:21:04,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 20:21:04,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 20:21:04,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 20:21:04,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:21:04" (1/1) ... [2021-03-11 20:21:04,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:21:04" (1/1) ... [2021-03-11 20:21:04,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:21:04" (1/1) ... [2021-03-11 20:21:04,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:21:04" (1/1) ... [2021-03-11 20:21:04,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:21:04" (1/1) ... [2021-03-11 20:21:04,410 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:21:04" (1/1) ... [2021-03-11 20:21:04,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:21:04" (1/1) ... [2021-03-11 20:21:04,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 20:21:04,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 20:21:04,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 20:21:04,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 20:21:04,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:21:04" (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 20:21:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-11 20:21:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-11 20:21:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-11 20:21:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-11 20:21:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-11 20:21:04,482 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-11 20:21:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-11 20:21:04,483 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-11 20:21:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-11 20:21:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-11 20:21:04,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 20:21:04,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 20:21:04,484 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 20:21:04,750 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 20:21:04,751 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-11 20:21:04,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:21:04 BoogieIcfgContainer [2021-03-11 20:21:04,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 20:21:04,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 20:21:04,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 20:21:04,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 20:21:04,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.03 08:21:03" (1/3) ... [2021-03-11 20:21:04,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eff8415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:21:04, skipping insertion in model container [2021-03-11 20:21:04,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:21:04" (2/3) ... [2021-03-11 20:21:04,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eff8415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:21:04, skipping insertion in model container [2021-03-11 20:21:04,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:21:04" (3/3) ... [2021-03-11 20:21:04,757 INFO L111 eAbstractionObserver]: Analyzing ICFG safe006_pso.opt.i [2021-03-11 20:21:04,761 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 20:21:04,763 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 20:21:04,764 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 20:21:04,784 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,784 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,784 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,784 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,784 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,785 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,785 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,785 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,785 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,785 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,785 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,785 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,786 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,786 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,786 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,786 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,786 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,786 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,786 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,786 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,786 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,787 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,787 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,787 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,788 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,788 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,788 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,788 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,791 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,792 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,792 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,792 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:21:04,793 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 20:21:04,805 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-11 20:21:04,819 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 20:21:04,819 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 20:21:04,819 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 20:21:04,819 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 20:21:04,819 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 20:21:04,819 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 20:21:04,820 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 20:21:04,820 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 20:21:04,826 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 66 places, 61 transitions, 132 flow [2021-03-11 20:21:04,847 INFO L129 PetriNetUnfolder]: 2/59 cut-off events. [2021-03-11 20:21:04,848 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:21:04,852 INFO L84 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 59 events. 2/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 35 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2021-03-11 20:21:04,852 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 61 transitions, 132 flow [2021-03-11 20:21:04,855 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 49 transitions, 104 flow [2021-03-11 20:21:04,857 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 20:21:04,863 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 55 places, 49 transitions, 104 flow [2021-03-11 20:21:04,865 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 55 places, 49 transitions, 104 flow [2021-03-11 20:21:04,865 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 55 places, 49 transitions, 104 flow [2021-03-11 20:21:04,889 INFO L129 PetriNetUnfolder]: 1/49 cut-off events. [2021-03-11 20:21:04,890 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:21:04,891 INFO L84 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 49 events. 1/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2021-03-11 20:21:04,892 INFO L116 LiptonReduction]: Number of co-enabled transitions 456 [2021-03-11 20:21:06,288 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-03-11 20:21:06,469 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-03-11 20:21:06,535 INFO L131 LiptonReduction]: Checked pairs total: 782 [2021-03-11 20:21:06,535 INFO L133 LiptonReduction]: Total number of compositions: 39 [2021-03-11 20:21:06,536 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1681 [2021-03-11 20:21:06,544 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-11 20:21:06,544 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:21:06,544 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:06,544 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 20:21:06,545 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:06,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1999328934, now seen corresponding path program 1 times [2021-03-11 20:21:06,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:06,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541995256] [2021-03-11 20:21:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:06,725 INFO L142 QuantifierPusher]: treesize reduction 3, result has 75.0 percent of original size [2021-03-11 20:21:06,726 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 20:21:06,732 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 20:21:06,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541995256] [2021-03-11 20:21:06,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:06,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:21:06,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619422641] [2021-03-11 20:21:06,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:21:06,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:06,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:21:06,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:21:06,751 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 100 [2021-03-11 20:21:06,752 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 12 transitions, 30 flow. Second operand has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 20:21:06,752 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:06,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 100 [2021-03-11 20:21:06,754 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:06,776 INFO L129 PetriNetUnfolder]: 3/22 cut-off events. [2021-03-11 20:21:06,776 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:21:06,777 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 36 event pairs, 1 based on Foata normal form. 1/23 useless extension candidates. Maximal degree in co-relation 31. Up to 10 conditions per place. [2021-03-11 20:21:06,778 INFO L132 encePairwiseOnDemand]: 96/100 looper letters, 3 selfloop transitions, 3 changer transitions 0/14 dead transitions. [2021-03-11 20:21:06,778 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 14 transitions, 46 flow [2021-03-11 20:21:06,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:21:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:21:06,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 229 transitions. [2021-03-11 20:21:06,785 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7633333333333333 [2021-03-11 20:21:06,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 229 transitions. [2021-03-11 20:21:06,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 229 transitions. [2021-03-11 20:21:06,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:06,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 229 transitions. [2021-03-11 20:21:06,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 20:21:06,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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 20:21:06,804 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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 20:21:06,805 INFO L185 Difference]: Start difference. First operand has 19 places, 12 transitions, 30 flow. Second operand 3 states and 229 transitions. [2021-03-11 20:21:06,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 14 transitions, 46 flow [2021-03-11 20:21:06,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 14 transitions, 44 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:21:06,807 INFO L241 Difference]: Finished difference. Result has 20 places, 14 transitions, 47 flow [2021-03-11 20:21:06,809 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=28, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2021-03-11 20:21:06,809 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2021-03-11 20:21:06,809 INFO L480 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 47 flow [2021-03-11 20:21:06,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 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 20:21:06,809 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:06,810 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:21:06,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 20:21:06,810 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:06,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1849654279, now seen corresponding path program 1 times [2021-03-11 20:21:06,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:06,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248020441] [2021-03-11 20:21:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:06,847 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:06,848 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:06,851 INFO L142 QuantifierPusher]: treesize reduction 3, result has 75.0 percent of original size [2021-03-11 20:21:06,851 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 20:21:06,856 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 20:21:06,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248020441] [2021-03-11 20:21:06,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:06,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:21:06,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145085287] [2021-03-11 20:21:06,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:21:06,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:06,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:21:06,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:21:06,858 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 100 [2021-03-11 20:21:06,859 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 14 transitions, 47 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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 20:21:06,859 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:06,859 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 100 [2021-03-11 20:21:06,859 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:06,880 INFO L129 PetriNetUnfolder]: 4/34 cut-off events. [2021-03-11 20:21:06,880 INFO L130 PetriNetUnfolder]: For 9/12 co-relation queries the response was YES. [2021-03-11 20:21:06,880 INFO L84 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 34 events. 4/34 cut-off events. For 9/12 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 98 event pairs, 0 based on Foata normal form. 3/37 useless extension candidates. Maximal degree in co-relation 64. Up to 12 conditions per place. [2021-03-11 20:21:06,880 INFO L132 encePairwiseOnDemand]: 95/100 looper letters, 4 selfloop transitions, 6 changer transitions 0/17 dead transitions. [2021-03-11 20:21:06,881 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 17 transitions, 77 flow [2021-03-11 20:21:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:21:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:21:06,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 366 transitions. [2021-03-11 20:21:06,883 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.732 [2021-03-11 20:21:06,883 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 366 transitions. [2021-03-11 20:21:06,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 366 transitions. [2021-03-11 20:21:06,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:06,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 366 transitions. [2021-03-11 20:21:06,884 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 20:21:06,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 100.0) internal successors, (600), 6 states have internal predecessors, (600), 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 20:21:06,886 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 100.0) internal successors, (600), 6 states have internal predecessors, (600), 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 20:21:06,886 INFO L185 Difference]: Start difference. First operand has 20 places, 14 transitions, 47 flow. Second operand 5 states and 366 transitions. [2021-03-11 20:21:06,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 17 transitions, 77 flow [2021-03-11 20:21:06,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 17 transitions, 74 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:21:06,887 INFO L241 Difference]: Finished difference. Result has 26 places, 16 transitions, 78 flow [2021-03-11 20:21:06,887 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=78, PETRI_PLACES=26, PETRI_TRANSITIONS=16} [2021-03-11 20:21:06,887 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 7 predicate places. [2021-03-11 20:21:06,888 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 16 transitions, 78 flow [2021-03-11 20:21:06,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 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 20:21:06,888 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:06,888 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:21:06,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 20:21:06,888 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:06,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1849653907, now seen corresponding path program 1 times [2021-03-11 20:21:06,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:06,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837008133] [2021-03-11 20:21:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:06,938 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:06,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:06,941 INFO L142 QuantifierPusher]: treesize reduction 3, result has 75.0 percent of original size [2021-03-11 20:21:06,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 20:21:06,946 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 20:21:06,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837008133] [2021-03-11 20:21:06,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:06,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:21:06,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694794969] [2021-03-11 20:21:06,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:21:06,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:06,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:21:06,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:21:06,948 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 100 [2021-03-11 20:21:06,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 16 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 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 20:21:06,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:06,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 100 [2021-03-11 20:21:06,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:06,958 INFO L129 PetriNetUnfolder]: 1/21 cut-off events. [2021-03-11 20:21:06,958 INFO L130 PetriNetUnfolder]: For 19/21 co-relation queries the response was YES. [2021-03-11 20:21:06,959 INFO L84 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 21 events. 1/21 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 47 event pairs, 0 based on Foata normal form. 3/24 useless extension candidates. Maximal degree in co-relation 48. Up to 7 conditions per place. [2021-03-11 20:21:06,959 INFO L132 encePairwiseOnDemand]: 97/100 looper letters, 3 selfloop transitions, 3 changer transitions 2/16 dead transitions. [2021-03-11 20:21:06,959 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 16 transitions, 92 flow [2021-03-11 20:21:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:21:06,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:21:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2021-03-11 20:21:06,960 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.76 [2021-03-11 20:21:06,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2021-03-11 20:21:06,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2021-03-11 20:21:06,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:06,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2021-03-11 20:21:06,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 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 20:21:06,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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 20:21:06,962 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 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 20:21:06,962 INFO L185 Difference]: Start difference. First operand has 26 places, 16 transitions, 78 flow. Second operand 3 states and 228 transitions. [2021-03-11 20:21:06,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 16 transitions, 92 flow [2021-03-11 20:21:06,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 16 transitions, 90 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:21:06,963 INFO L241 Difference]: Finished difference. Result has 28 places, 14 transitions, 73 flow [2021-03-11 20:21:06,964 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=28, PETRI_TRANSITIONS=14} [2021-03-11 20:21:06,964 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 9 predicate places. [2021-03-11 20:21:06,964 INFO L480 AbstractCegarLoop]: Abstraction has has 28 places, 14 transitions, 73 flow [2021-03-11 20:21:06,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 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 20:21:06,964 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:06,964 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:21:06,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 20:21:06,964 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:06,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:06,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1504706898, now seen corresponding path program 1 times [2021-03-11 20:21:06,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:06,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259448582] [2021-03-11 20:21:06,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:06,991 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:06,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:06,996 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:06,996 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:07,000 INFO L142 QuantifierPusher]: treesize reduction 3, result has 75.0 percent of original size [2021-03-11 20:21:07,002 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 20:21:07,007 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 20:21:07,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259448582] [2021-03-11 20:21:07,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:07,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:21:07,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478596487] [2021-03-11 20:21:07,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:21:07,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:07,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:21:07,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:21:07,010 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 100 [2021-03-11 20:21:07,010 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 14 transitions, 73 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 20:21:07,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:07,010 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 100 [2021-03-11 20:21:07,010 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:07,031 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-03-11 20:21:07,032 INFO L130 PetriNetUnfolder]: For 34/36 co-relation queries the response was YES. [2021-03-11 20:21:07,032 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 18 events. 0/18 cut-off events. For 34/36 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 21 event pairs, 0 based on Foata normal form. 2/20 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2021-03-11 20:21:07,032 INFO L132 encePairwiseOnDemand]: 96/100 looper letters, 2 selfloop transitions, 3 changer transitions 2/14 dead transitions. [2021-03-11 20:21:07,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 14 transitions, 87 flow [2021-03-11 20:21:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:21:07,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:21:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 292 transitions. [2021-03-11 20:21:07,034 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.73 [2021-03-11 20:21:07,034 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 292 transitions. [2021-03-11 20:21:07,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 292 transitions. [2021-03-11 20:21:07,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:07,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 292 transitions. [2021-03-11 20:21:07,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 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 20:21:07,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 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 20:21:07,036 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 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 20:21:07,037 INFO L185 Difference]: Start difference. First operand has 28 places, 14 transitions, 73 flow. Second operand 4 states and 292 transitions. [2021-03-11 20:21:07,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 14 transitions, 87 flow [2021-03-11 20:21:07,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 14 transitions, 73 flow, removed 1 selfloop flow, removed 5 redundant places. [2021-03-11 20:21:07,038 INFO L241 Difference]: Finished difference. Result has 27 places, 12 transitions, 62 flow [2021-03-11 20:21:07,038 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=22, 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=4, PETRI_FLOW=62, PETRI_PLACES=27, PETRI_TRANSITIONS=12} [2021-03-11 20:21:07,038 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2021-03-11 20:21:07,038 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 12 transitions, 62 flow [2021-03-11 20:21:07,039 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 20:21:07,039 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:21:07,039 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:21:07,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 20:21:07,039 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:21:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:21:07,039 INFO L82 PathProgramCache]: Analyzing trace with hash -627969590, now seen corresponding path program 1 times [2021-03-11 20:21:07,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:21:07,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855121656] [2021-03-11 20:21:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:21:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:21:07,087 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:07,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:07,089 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:21:07,090 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:21:07,093 INFO L142 QuantifierPusher]: treesize reduction 3, result has 75.0 percent of original size [2021-03-11 20:21:07,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-03-11 20:21:07,102 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 20:21:07,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855121656] [2021-03-11 20:21:07,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:21:07,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:21:07,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382748814] [2021-03-11 20:21:07,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:21:07,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:21:07,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:21:07,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:21:07,105 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 100 [2021-03-11 20:21:07,106 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 12 transitions, 62 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 20:21:07,106 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:21:07,106 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 100 [2021-03-11 20:21:07,106 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:21:07,116 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-03-11 20:21:07,117 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2021-03-11 20:21:07,117 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 11 events. 0/11 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 2/13 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-03-11 20:21:07,117 INFO L132 encePairwiseOnDemand]: 97/100 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2021-03-11 20:21:07,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 11 transitions, 58 flow [2021-03-11 20:21:07,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:21:07,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:21:07,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 290 transitions. [2021-03-11 20:21:07,118 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.725 [2021-03-11 20:21:07,118 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 290 transitions. [2021-03-11 20:21:07,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 290 transitions. [2021-03-11 20:21:07,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:21:07,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 290 transitions. [2021-03-11 20:21:07,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.5) internal successors, (290), 4 states have internal predecessors, (290), 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 20:21:07,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 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 20:21:07,120 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 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 20:21:07,120 INFO L185 Difference]: Start difference. First operand has 27 places, 12 transitions, 62 flow. Second operand 4 states and 290 transitions. [2021-03-11 20:21:07,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 11 transitions, 58 flow [2021-03-11 20:21:07,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 11 transitions, 34 flow, removed 2 selfloop flow, removed 10 redundant places. [2021-03-11 20:21:07,121 INFO L241 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2021-03-11 20:21:07,121 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=100, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=16, 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=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2021-03-11 20:21:07,121 INFO L335 CegarLoopForPetriNet]: 19 programPoint places, 0 predicate places. [2021-03-11 20:21:07,121 INFO L480 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2021-03-11 20:21:07,122 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 20:21:07,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 20:21:07,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 08:21:07 BasicIcfg [2021-03-11 20:21:07,124 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 20:21:07,125 INFO L168 Benchmark]: Toolchain (without parser) took 3208.01 ms. Allocated memory was 346.0 MB in the beginning and 438.3 MB in the end (delta: 92.3 MB). Free memory was 308.7 MB in the beginning and 365.5 MB in the end (delta: -56.8 MB). Peak memory consumption was 36.6 MB. Max. memory is 16.0 GB. [2021-03-11 20:21:07,125 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 346.0 MB. Free memory was 327.0 MB in the beginning and 326.9 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 20:21:07,126 INFO L168 Benchmark]: CACSL2BoogieTranslator took 434.40 ms. Allocated memory is still 346.0 MB. Free memory was 308.0 MB in the beginning and 307.9 MB in the end (delta: 89.4 kB). Peak memory consumption was 6.9 MB. Max. memory is 16.0 GB. [2021-03-11 20:21:07,126 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.01 ms. Allocated memory is still 346.0 MB. Free memory was 307.9 MB in the beginning and 306.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:21:07,126 INFO L168 Benchmark]: Boogie Preprocessor took 26.52 ms. Allocated memory is still 346.0 MB. Free memory was 306.9 MB in the beginning and 304.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:21:07,127 INFO L168 Benchmark]: RCFGBuilder took 339.16 ms. Allocated memory is still 346.0 MB. Free memory was 304.8 MB in the beginning and 283.8 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. [2021-03-11 20:21:07,127 INFO L168 Benchmark]: TraceAbstraction took 2371.39 ms. Allocated memory was 346.0 MB in the beginning and 438.3 MB in the end (delta: 92.3 MB). Free memory was 282.8 MB in the beginning and 365.5 MB in the end (delta: -82.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.0 GB. [2021-03-11 20:21:07,129 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 346.0 MB. Free memory was 327.0 MB in the beginning and 326.9 MB in the end (delta: 77.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 434.40 ms. Allocated memory is still 346.0 MB. Free memory was 308.0 MB in the beginning and 307.9 MB in the end (delta: 89.4 kB). Peak memory consumption was 6.9 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.01 ms. Allocated memory is still 346.0 MB. Free memory was 307.9 MB in the beginning and 306.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 26.52 ms. Allocated memory is still 346.0 MB. Free memory was 306.9 MB in the beginning and 304.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 339.16 ms. Allocated memory is still 346.0 MB. Free memory was 304.8 MB in the beginning and 283.8 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2371.39 ms. Allocated memory was 346.0 MB in the beginning and 438.3 MB in the end (delta: 92.3 MB). Free memory was 282.8 MB in the beginning and 365.5 MB in the end (delta: -82.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1670.5ms, 55 PlacesBefore, 19 PlacesAfterwards, 49 TransitionsBefore, 12 TransitionsAfterwards, 456 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 1 ChoiceCompositions, 39 TotalNumberOfCompositions, 782 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 491, positive: 439, positive conditional: 0, positive unconditional: 439, negative: 52, negative conditional: 0, negative unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 333, positive: 313, positive conditional: 0, positive unconditional: 313, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 333, positive: 309, positive conditional: 0, positive unconditional: 309, negative: 24, negative conditional: 0, negative unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 24, positive: 4, positive conditional: 0, positive unconditional: 4, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 83, positive: 20, positive conditional: 0, positive unconditional: 20, negative: 63, negative conditional: 0, negative unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 491, positive: 126, positive conditional: 0, positive unconditional: 126, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 333, unknown conditional: 0, unknown unconditional: 333] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, 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, 60 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.0ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2305.9ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 156.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1721.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21 SDtfs, 11 SDslu, 4 SDs, 0 SdLazy, 25 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=2, InterpolantAutomatonStates: 19, 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: 15.6ms SsaConstructionTime, 87.2ms SatisfiabilityAnalysisTime, 212.2ms InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 156 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...