/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf -i ../../../trunk/examples/svcomp/pthread-lit/fkp2013_variant-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 05:12:44,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 05:12:44,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 05:12:44,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 05:12:44,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 05:12:44,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 05:12:44,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 05:12:44,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 05:12:44,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 05:12:44,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 05:12:44,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 05:12:44,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 05:12:44,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 05:12:44,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 05:12:44,687 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 05:12:44,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 05:12:44,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 05:12:44,691 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 05:12:44,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 05:12:44,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 05:12:44,705 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 05:12:44,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 05:12:44,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 05:12:44,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 05:12:44,722 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 05:12:44,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 05:12:44,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 05:12:44,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 05:12:44,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 05:12:44,737 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 05:12:44,738 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 05:12:44,738 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 05:12:44,739 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 05:12:44,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 05:12:44,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 05:12:44,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 05:12:44,741 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe-SemanticLooper.epf [2020-10-16 05:12:44,762 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 05:12:44,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 05:12:44,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 05:12:44,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 05:12:44,764 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 05:12:44,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 05:12:44,765 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 05:12:44,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 05:12:44,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 05:12:44,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 05:12:44,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 05:12:44,766 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 05:12:44,766 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 05:12:44,766 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 05:12:44,766 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 05:12:44,767 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 05:12:44,767 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 05:12:44,767 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 05:12:44,767 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 05:12:44,767 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 05:12:44,768 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 05:12:44,768 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 05:12:44,768 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 05:12:44,768 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 05:12:44,769 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 05:12:44,769 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 05:12:44,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 05:12:44,769 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 05:12:44,769 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 05:12:45,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 05:12:45,084 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 05:12:45,088 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 05:12:45,089 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 05:12:45,090 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 05:12:45,090 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-lit/fkp2013_variant-1.i [2020-10-16 05:12:45,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5a3ec9cd/5dfd4d887b184889aa5070cb1b8550ab/FLAGbe1182d0b [2020-10-16 05:12:45,690 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 05:12:45,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-lit/fkp2013_variant-1.i [2020-10-16 05:12:45,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5a3ec9cd/5dfd4d887b184889aa5070cb1b8550ab/FLAGbe1182d0b [2020-10-16 05:12:45,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5a3ec9cd/5dfd4d887b184889aa5070cb1b8550ab [2020-10-16 05:12:45,908 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 05:12:45,910 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 05:12:45,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 05:12:45,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 05:12:45,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 05:12:45,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:12:45" (1/1) ... [2020-10-16 05:12:45,918 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fa2ec73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:12:45, skipping insertion in model container [2020-10-16 05:12:45,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 05:12:45" (1/1) ... [2020-10-16 05:12:45,926 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 05:12:45,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 05:12:46,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 05:12:46,473 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 05:12:46,539 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 05:12:46,630 INFO L208 MainTranslator]: Completed translation [2020-10-16 05:12:46,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:12:46 WrapperNode [2020-10-16 05:12:46,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 05:12:46,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 05:12:46,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 05:12:46,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 05:12:46,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:12:46" (1/1) ... [2020-10-16 05:12:46,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:12:46" (1/1) ... [2020-10-16 05:12:46,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 05:12:46,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 05:12:46,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 05:12:46,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 05:12:46,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:12:46" (1/1) ... [2020-10-16 05:12:46,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:12:46" (1/1) ... [2020-10-16 05:12:46,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:12:46" (1/1) ... [2020-10-16 05:12:46,700 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:12:46" (1/1) ... [2020-10-16 05:12:46,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:12:46" (1/1) ... [2020-10-16 05:12:46,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:12:46" (1/1) ... [2020-10-16 05:12:46,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:12:46" (1/1) ... [2020-10-16 05:12:46,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 05:12:46,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 05:12:46,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 05:12:46,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 05:12:46,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:12:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 05:12:46,779 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2020-10-16 05:12:46,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2020-10-16 05:12:46,780 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-16 05:12:46,780 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-16 05:12:46,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 05:12:46,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 05:12:46,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 05:12:46,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 05:12:46,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 05:12:46,782 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 05:12:47,080 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 05:12:47,080 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-16 05:12:47,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:12:47 BoogieIcfgContainer [2020-10-16 05:12:47,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 05:12:47,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 05:12:47,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 05:12:47,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 05:12:47,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 05:12:45" (1/3) ... [2020-10-16 05:12:47,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55789c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:12:47, skipping insertion in model container [2020-10-16 05:12:47,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 05:12:46" (2/3) ... [2020-10-16 05:12:47,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55789c2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 05:12:47, skipping insertion in model container [2020-10-16 05:12:47,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 05:12:47" (3/3) ... [2020-10-16 05:12:47,090 INFO L111 eAbstractionObserver]: Analyzing ICFG fkp2013_variant-1.i [2020-10-16 05:12:47,102 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 05:12:47,116 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 05:12:47,117 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 05:12:47,156 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,157 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,157 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,157 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,158 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,158 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,158 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,159 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,159 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,160 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,160 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,160 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,160 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,161 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,161 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,161 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,162 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,162 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,162 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,163 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,163 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,167 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,167 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,167 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,168 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,168 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,168 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,187 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,187 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,188 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,188 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,188 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:47,208 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-16 05:12:47,225 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:12:47,226 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:12:47,226 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:12:47,226 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:12:47,226 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:12:47,226 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:12:47,226 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:12:47,227 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:12:47,240 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 64 places, 61 transitions, 132 flow [2020-10-16 05:12:47,283 INFO L129 PetriNetUnfolder]: 4/71 cut-off events. [2020-10-16 05:12:47,284 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:12:47,290 INFO L80 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 71 events. 4/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 94 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2020-10-16 05:12:47,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 61 transitions, 132 flow [2020-10-16 05:12:47,296 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 60 transitions, 128 flow [2020-10-16 05:12:47,299 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:12:47,301 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 60 transitions, 128 flow [2020-10-16 05:12:47,304 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 60 transitions, 128 flow [2020-10-16 05:12:47,305 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 63 places, 60 transitions, 128 flow [2020-10-16 05:12:47,329 INFO L129 PetriNetUnfolder]: 4/71 cut-off events. [2020-10-16 05:12:47,330 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:12:47,331 INFO L80 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 71 events. 4/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 50. Up to 4 conditions per place. [2020-10-16 05:12:47,333 INFO L117 LiptonReduction]: Number of co-enabled transitions 692 [2020-10-16 05:12:48,467 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-16 05:12:48,981 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-16 05:12:49,071 INFO L132 LiptonReduction]: Checked pairs total: 623 [2020-10-16 05:12:49,071 INFO L134 LiptonReduction]: Total number of compositions: 61 [2020-10-16 05:12:49,074 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1777 [2020-10-16 05:12:49,080 INFO L129 PetriNetUnfolder]: 0/3 cut-off events. [2020-10-16 05:12:49,081 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:12:49,081 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:12:49,082 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2020-10-16 05:12:49,083 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 05:12:49,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:12:49,090 INFO L82 PathProgramCache]: Analyzing trace with hash 245288, now seen corresponding path program 1 times [2020-10-16 05:12:49,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:12:49,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653359200] [2020-10-16 05:12:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:12:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:12:49,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:12:49,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653359200] [2020-10-16 05:12:49,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:12:49,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 05:12:49,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332866970] [2020-10-16 05:12:49,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:12:49,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:12:49,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:12:49,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:12:49,344 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 122 [2020-10-16 05:12:49,346 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 11 transitions, 30 flow. Second operand 3 states. [2020-10-16 05:12:49,346 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:12:49,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 122 [2020-10-16 05:12:49,348 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:12:49,387 INFO L129 PetriNetUnfolder]: 13/37 cut-off events. [2020-10-16 05:12:49,387 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:12:49,388 INFO L80 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 37 events. 13/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 98 event pairs, 4 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 69. Up to 19 conditions per place. [2020-10-16 05:12:49,390 INFO L132 encePairwiseOnDemand]: 119/122 looper letters, 7 selfloop transitions, 2 changer transitions 0/14 dead transitions. [2020-10-16 05:12:49,390 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 14 transitions, 54 flow [2020-10-16 05:12:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:12:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:12:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2020-10-16 05:12:49,408 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6174863387978142 [2020-10-16 05:12:49,409 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2020-10-16 05:12:49,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2020-10-16 05:12:49,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:12:49,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2020-10-16 05:12:49,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:12:49,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:12:49,426 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:12:49,428 INFO L185 Difference]: Start difference. First operand has 17 places, 11 transitions, 30 flow. Second operand 3 states and 226 transitions. [2020-10-16 05:12:49,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 14 transitions, 54 flow [2020-10-16 05:12:49,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 14 transitions, 53 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:12:49,435 INFO L241 Difference]: Finished difference. Result has 19 places, 11 transitions, 37 flow [2020-10-16 05:12:49,438 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=37, PETRI_PLACES=19, PETRI_TRANSITIONS=11} [2020-10-16 05:12:49,439 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 2 predicate places. [2020-10-16 05:12:49,440 INFO L481 AbstractCegarLoop]: Abstraction has has 19 places, 11 transitions, 37 flow [2020-10-16 05:12:49,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:12:49,440 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:12:49,440 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:12:49,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 05:12:49,441 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 05:12:49,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:12:49,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1115035197, now seen corresponding path program 1 times [2020-10-16 05:12:49,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:12:49,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579856051] [2020-10-16 05:12:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:12:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:12:49,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:12:49,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579856051] [2020-10-16 05:12:49,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:12:49,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-16 05:12:49,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501952575] [2020-10-16 05:12:49,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-16 05:12:49,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:12:49,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-16 05:12:49,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-16 05:12:49,535 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 122 [2020-10-16 05:12:49,536 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 11 transitions, 37 flow. Second operand 4 states. [2020-10-16 05:12:49,537 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:12:49,537 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 122 [2020-10-16 05:12:49,537 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:12:49,585 INFO L129 PetriNetUnfolder]: 11/32 cut-off events. [2020-10-16 05:12:49,585 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2020-10-16 05:12:49,585 INFO L80 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 32 events. 11/32 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 77 event pairs, 4 based on Foata normal form. 3/26 useless extension candidates. Maximal degree in co-relation 71. Up to 14 conditions per place. [2020-10-16 05:12:49,586 INFO L132 encePairwiseOnDemand]: 119/122 looper letters, 4 selfloop transitions, 2 changer transitions 2/13 dead transitions. [2020-10-16 05:12:49,586 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 55 flow [2020-10-16 05:12:49,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 05:12:49,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 05:12:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 297 transitions. [2020-10-16 05:12:49,594 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6086065573770492 [2020-10-16 05:12:49,595 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 297 transitions. [2020-10-16 05:12:49,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 297 transitions. [2020-10-16 05:12:49,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:12:49,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 297 transitions. [2020-10-16 05:12:49,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 05:12:49,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 05:12:49,604 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 05:12:49,605 INFO L185 Difference]: Start difference. First operand has 19 places, 11 transitions, 37 flow. Second operand 4 states and 297 transitions. [2020-10-16 05:12:49,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 55 flow [2020-10-16 05:12:49,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 13 transitions, 49 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-16 05:12:49,606 INFO L241 Difference]: Finished difference. Result has 18 places, 9 transitions, 29 flow [2020-10-16 05:12:49,606 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=122, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=29, PETRI_PLACES=18, PETRI_TRANSITIONS=9} [2020-10-16 05:12:49,607 INFO L342 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2020-10-16 05:12:49,607 INFO L481 AbstractCegarLoop]: Abstraction has has 18 places, 9 transitions, 29 flow [2020-10-16 05:12:49,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-16 05:12:49,608 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:12:49,608 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-10-16 05:12:49,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 05:12:49,608 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 05:12:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:12:49,609 INFO L82 PathProgramCache]: Analyzing trace with hash -206369818, now seen corresponding path program 1 times [2020-10-16 05:12:49,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:12:49,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556384160] [2020-10-16 05:12:49,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:12:49,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:12:49,664 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:12:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:12:49,697 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:12:49,736 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:12:49,736 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:12:49,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-16 05:12:49,738 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:12:49,740 WARN L371 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:12:49,741 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-16 05:12:49,752 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,753 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,753 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,753 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,753 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,754 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,754 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,754 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,754 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,755 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,755 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,755 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,755 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,755 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,756 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,756 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,756 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,756 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,757 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,757 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,757 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,757 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,758 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,758 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,758 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,758 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,758 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,758 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,759 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,759 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,759 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,760 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,760 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,760 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,760 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,760 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,761 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,761 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,761 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,761 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,761 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,761 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,762 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,762 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,762 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,763 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,763 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,763 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,764 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,765 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,765 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,765 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,765 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,765 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,767 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,767 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,767 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,767 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,768 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,769 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,769 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,769 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,770 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,770 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:49,772 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-16 05:12:49,772 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:12:49,772 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:12:49,772 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:12:49,773 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:12:49,773 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:12:49,773 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:12:49,773 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:12:49,773 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:12:49,775 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 85 places, 79 transitions, 182 flow [2020-10-16 05:12:49,792 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2020-10-16 05:12:49,792 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-10-16 05:12:49,794 INFO L80 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 93 events. 5/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 135 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 102. Up to 6 conditions per place. [2020-10-16 05:12:49,794 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 79 transitions, 182 flow [2020-10-16 05:12:49,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 67 transitions, 149 flow [2020-10-16 05:12:49,795 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:12:49,795 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 67 transitions, 149 flow [2020-10-16 05:12:49,795 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 67 transitions, 149 flow [2020-10-16 05:12:49,796 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 72 places, 67 transitions, 149 flow [2020-10-16 05:12:49,809 INFO L129 PetriNetUnfolder]: 5/93 cut-off events. [2020-10-16 05:12:49,810 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-10-16 05:12:49,811 INFO L80 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 93 events. 5/93 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 137 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 75. Up to 6 conditions per place. [2020-10-16 05:12:49,813 INFO L117 LiptonReduction]: Number of co-enabled transitions 1108 [2020-10-16 05:12:51,082 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-16 05:12:51,166 INFO L132 LiptonReduction]: Checked pairs total: 1464 [2020-10-16 05:12:51,167 INFO L134 LiptonReduction]: Total number of compositions: 62 [2020-10-16 05:12:51,167 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1372 [2020-10-16 05:12:51,169 INFO L129 PetriNetUnfolder]: 0/3 cut-off events. [2020-10-16 05:12:51,169 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:12:51,169 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:12:51,169 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2020-10-16 05:12:51,169 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:12:51,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:12:51,170 INFO L82 PathProgramCache]: Analyzing trace with hash 403086, now seen corresponding path program 1 times [2020-10-16 05:12:51,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:12:51,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745315201] [2020-10-16 05:12:51,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:12:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:12:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:12:51,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745315201] [2020-10-16 05:12:51,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:12:51,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 05:12:51,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898757595] [2020-10-16 05:12:51,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:12:51,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:12:51,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:12:51,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:12:51,208 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 141 [2020-10-16 05:12:51,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 16 transitions, 47 flow. Second operand 3 states. [2020-10-16 05:12:51,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:12:51,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 141 [2020-10-16 05:12:51,209 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:12:51,268 INFO L129 PetriNetUnfolder]: 122/218 cut-off events. [2020-10-16 05:12:51,269 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-10-16 05:12:51,269 INFO L80 FinitePrefix]: Finished finitePrefix Result has 441 conditions, 218 events. 122/218 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 999 event pairs, 42 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 431. Up to 135 conditions per place. [2020-10-16 05:12:51,271 INFO L132 encePairwiseOnDemand]: 137/141 looper letters, 13 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2020-10-16 05:12:51,271 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 93 flow [2020-10-16 05:12:51,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:12:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:12:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2020-10-16 05:12:51,274 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6572104018912529 [2020-10-16 05:12:51,274 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2020-10-16 05:12:51,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2020-10-16 05:12:51,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:12:51,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2020-10-16 05:12:51,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:12:51,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:12:51,277 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:12:51,277 INFO L185 Difference]: Start difference. First operand has 24 places, 16 transitions, 47 flow. Second operand 3 states and 278 transitions. [2020-10-16 05:12:51,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 93 flow [2020-10-16 05:12:51,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 90 flow, removed 1 selfloop flow, removed 1 redundant places. [2020-10-16 05:12:51,279 INFO L241 Difference]: Finished difference. Result has 26 places, 18 transitions, 63 flow [2020-10-16 05:12:51,279 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=26, PETRI_TRANSITIONS=18} [2020-10-16 05:12:51,280 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2020-10-16 05:12:51,280 INFO L481 AbstractCegarLoop]: Abstraction has has 26 places, 18 transitions, 63 flow [2020-10-16 05:12:51,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:12:51,280 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:12:51,280 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:12:51,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-16 05:12:51,281 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:12:51,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:12:51,281 INFO L82 PathProgramCache]: Analyzing trace with hash -928690806, now seen corresponding path program 1 times [2020-10-16 05:12:51,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:12:51,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638042804] [2020-10-16 05:12:51,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:12:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:12:51,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:12:51,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638042804] [2020-10-16 05:12:51,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:12:51,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:12:51,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221384141] [2020-10-16 05:12:51,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 05:12:51,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:12:51,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 05:12:51,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 05:12:51,332 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 141 [2020-10-16 05:12:51,332 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 18 transitions, 63 flow. Second operand 5 states. [2020-10-16 05:12:51,332 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:12:51,332 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 141 [2020-10-16 05:12:51,333 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:12:51,446 INFO L129 PetriNetUnfolder]: 131/265 cut-off events. [2020-10-16 05:12:51,446 INFO L130 PetriNetUnfolder]: For 18/18 co-relation queries the response was YES. [2020-10-16 05:12:51,447 INFO L80 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 265 events. 131/265 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 1386 event pairs, 20 based on Foata normal form. 11/231 useless extension candidates. Maximal degree in co-relation 626. Up to 74 conditions per place. [2020-10-16 05:12:51,449 INFO L132 encePairwiseOnDemand]: 135/141 looper letters, 24 selfloop transitions, 10 changer transitions 1/41 dead transitions. [2020-10-16 05:12:51,449 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 190 flow [2020-10-16 05:12:51,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 05:12:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 05:12:51,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 631 transitions. [2020-10-16 05:12:51,452 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6393110435663627 [2020-10-16 05:12:51,452 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 631 transitions. [2020-10-16 05:12:51,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 631 transitions. [2020-10-16 05:12:51,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:12:51,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 631 transitions. [2020-10-16 05:12:51,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 05:12:51,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 05:12:51,457 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 05:12:51,458 INFO L185 Difference]: Start difference. First operand has 26 places, 18 transitions, 63 flow. Second operand 7 states and 631 transitions. [2020-10-16 05:12:51,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 190 flow [2020-10-16 05:12:51,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 41 transitions, 186 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:12:51,460 INFO L241 Difference]: Finished difference. Result has 36 places, 24 transitions, 127 flow [2020-10-16 05:12:51,461 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=127, PETRI_PLACES=36, PETRI_TRANSITIONS=24} [2020-10-16 05:12:51,461 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 12 predicate places. [2020-10-16 05:12:51,461 INFO L481 AbstractCegarLoop]: Abstraction has has 36 places, 24 transitions, 127 flow [2020-10-16 05:12:51,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 05:12:51,461 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:12:51,462 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:12:51,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 05:12:51,462 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:12:51,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:12:51,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1608038659, now seen corresponding path program 1 times [2020-10-16 05:12:51,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:12:51,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712419550] [2020-10-16 05:12:51,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:12:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:12:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:12:51,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712419550] [2020-10-16 05:12:51,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:12:51,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:12:51,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915057176] [2020-10-16 05:12:51,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 05:12:51,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:12:51,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 05:12:51,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 05:12:51,514 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 141 [2020-10-16 05:12:51,514 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 24 transitions, 127 flow. Second operand 5 states. [2020-10-16 05:12:51,514 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:12:51,515 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 141 [2020-10-16 05:12:51,515 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:12:51,655 INFO L129 PetriNetUnfolder]: 135/294 cut-off events. [2020-10-16 05:12:51,655 INFO L130 PetriNetUnfolder]: For 378/378 co-relation queries the response was YES. [2020-10-16 05:12:51,657 INFO L80 FinitePrefix]: Finished finitePrefix Result has 950 conditions, 294 events. 135/294 cut-off events. For 378/378 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 1695 event pairs, 26 based on Foata normal form. 12/253 useless extension candidates. Maximal degree in co-relation 932. Up to 79 conditions per place. [2020-10-16 05:12:51,659 INFO L132 encePairwiseOnDemand]: 135/141 looper letters, 27 selfloop transitions, 15 changer transitions 1/49 dead transitions. [2020-10-16 05:12:51,659 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 49 transitions, 323 flow [2020-10-16 05:12:51,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 05:12:51,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 05:12:51,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 626 transitions. [2020-10-16 05:12:51,663 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6342451874366768 [2020-10-16 05:12:51,663 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 626 transitions. [2020-10-16 05:12:51,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 626 transitions. [2020-10-16 05:12:51,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:12:51,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 626 transitions. [2020-10-16 05:12:51,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 05:12:51,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 05:12:51,669 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 05:12:51,669 INFO L185 Difference]: Start difference. First operand has 36 places, 24 transitions, 127 flow. Second operand 7 states and 626 transitions. [2020-10-16 05:12:51,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 49 transitions, 323 flow [2020-10-16 05:12:51,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 316 flow, removed 1 selfloop flow, removed 1 redundant places. [2020-10-16 05:12:51,675 INFO L241 Difference]: Finished difference. Result has 46 places, 32 transitions, 241 flow [2020-10-16 05:12:51,675 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=241, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2020-10-16 05:12:51,675 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2020-10-16 05:12:51,676 INFO L481 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 241 flow [2020-10-16 05:12:51,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 05:12:51,676 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:12:51,676 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-10-16 05:12:51,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-16 05:12:51,677 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:12:51,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:12:51,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1686823233, now seen corresponding path program 1 times [2020-10-16 05:12:51,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:12:51,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398199278] [2020-10-16 05:12:51,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:12:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:12:51,694 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:12:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:12:51,706 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:12:51,712 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:12:51,712 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:12:51,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-16 05:12:51,713 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:12:51,713 WARN L371 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:12:51,715 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-16 05:12:51,726 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,726 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,726 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,726 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,727 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,727 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,727 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,727 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,728 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,728 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,728 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,728 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,728 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,729 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,729 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,729 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,729 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,729 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,730 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,730 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,730 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,730 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,730 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,731 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,731 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,731 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,731 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,732 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,732 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,732 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,732 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,733 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,733 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,733 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,733 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,733 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,734 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,734 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,734 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,735 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,735 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,735 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,735 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,735 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,736 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,736 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,736 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,736 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,736 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,737 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,737 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,737 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,737 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,738 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,738 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,738 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,738 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,738 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,739 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,739 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,739 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,739 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,739 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,740 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,740 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,740 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,740 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,740 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,741 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,742 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,743 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,743 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,743 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,743 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,744 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,748 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,749 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,749 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,749 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,749 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,749 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,750 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,751 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,751 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,751 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,751 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,752 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,753 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,764 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,764 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,764 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,766 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,767 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,767 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,767 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,767 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:12:51,769 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-10-16 05:12:51,769 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:12:51,769 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:12:51,769 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:12:51,769 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:12:51,770 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:12:51,770 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:12:51,770 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:12:51,770 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:12:51,772 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 106 places, 97 transitions, 236 flow [2020-10-16 05:12:51,784 INFO L129 PetriNetUnfolder]: 6/115 cut-off events. [2020-10-16 05:12:51,785 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-10-16 05:12:51,786 INFO L80 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 115 events. 6/115 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 174 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 129. Up to 8 conditions per place. [2020-10-16 05:12:51,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 97 transitions, 236 flow [2020-10-16 05:12:51,787 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 74 transitions, 172 flow [2020-10-16 05:12:51,787 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:12:51,787 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 74 transitions, 172 flow [2020-10-16 05:12:51,788 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 74 transitions, 172 flow [2020-10-16 05:12:51,788 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 81 places, 74 transitions, 172 flow [2020-10-16 05:12:51,800 INFO L129 PetriNetUnfolder]: 6/115 cut-off events. [2020-10-16 05:12:51,800 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-10-16 05:12:51,801 INFO L80 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 115 events. 6/115 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 180 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 102. Up to 8 conditions per place. [2020-10-16 05:12:51,804 INFO L117 LiptonReduction]: Number of co-enabled transitions 1608 [2020-10-16 05:12:52,805 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-16 05:12:53,053 INFO L132 LiptonReduction]: Checked pairs total: 2245 [2020-10-16 05:12:53,053 INFO L134 LiptonReduction]: Total number of compositions: 62 [2020-10-16 05:12:53,053 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1266 [2020-10-16 05:12:53,054 INFO L129 PetriNetUnfolder]: 0/2 cut-off events. [2020-10-16 05:12:53,054 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:12:53,055 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:12:53,055 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2020-10-16 05:12:53,055 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:12:53,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:12:53,056 INFO L82 PathProgramCache]: Analyzing trace with hash 578789, now seen corresponding path program 1 times [2020-10-16 05:12:53,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:12:53,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571972929] [2020-10-16 05:12:53,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:12:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:12:53,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:12:53,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571972929] [2020-10-16 05:12:53,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:12:53,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 05:12:53,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928044195] [2020-10-16 05:12:53,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:12:53,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:12:53,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:12:53,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:12:53,093 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 159 [2020-10-16 05:12:53,093 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 19 transitions, 62 flow. Second operand 3 states. [2020-10-16 05:12:53,094 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:12:53,094 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 159 [2020-10-16 05:12:53,094 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:12:53,233 INFO L129 PetriNetUnfolder]: 582/877 cut-off events. [2020-10-16 05:12:53,233 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-10-16 05:12:53,235 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1762 conditions, 877 events. 582/877 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 4530 event pairs, 147 based on Foata normal form. 0/669 useless extension candidates. Maximal degree in co-relation 1751. Up to 675 conditions per place. [2020-10-16 05:12:53,241 INFO L132 encePairwiseOnDemand]: 154/159 looper letters, 16 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2020-10-16 05:12:53,241 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 120 flow [2020-10-16 05:12:53,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:12:53,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:12:53,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2020-10-16 05:12:53,243 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6729559748427673 [2020-10-16 05:12:53,244 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2020-10-16 05:12:53,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2020-10-16 05:12:53,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:12:53,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2020-10-16 05:12:53,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:12:53,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:12:53,246 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:12:53,246 INFO L185 Difference]: Start difference. First operand has 29 places, 19 transitions, 62 flow. Second operand 3 states and 321 transitions. [2020-10-16 05:12:53,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 120 flow [2020-10-16 05:12:53,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 113 flow, removed 3 selfloop flow, removed 1 redundant places. [2020-10-16 05:12:53,252 INFO L241 Difference]: Finished difference. Result has 31 places, 22 transitions, 81 flow [2020-10-16 05:12:53,253 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2020-10-16 05:12:53,253 INFO L342 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2020-10-16 05:12:53,253 INFO L481 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 81 flow [2020-10-16 05:12:53,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:12:53,253 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:12:53,253 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:12:53,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-16 05:12:53,254 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:12:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:12:53,254 INFO L82 PathProgramCache]: Analyzing trace with hash -239851129, now seen corresponding path program 1 times [2020-10-16 05:12:53,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:12:53,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347375847] [2020-10-16 05:12:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:12:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:12:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:12:53,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347375847] [2020-10-16 05:12:53,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:12:53,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:12:53,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811091521] [2020-10-16 05:12:53,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 05:12:53,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:12:53,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 05:12:53,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 05:12:53,354 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 159 [2020-10-16 05:12:53,354 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 81 flow. Second operand 5 states. [2020-10-16 05:12:53,354 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:12:53,354 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 159 [2020-10-16 05:12:53,355 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:12:53,597 INFO L129 PetriNetUnfolder]: 819/1327 cut-off events. [2020-10-16 05:12:53,598 INFO L130 PetriNetUnfolder]: For 123/123 co-relation queries the response was YES. [2020-10-16 05:12:53,601 INFO L80 FinitePrefix]: Finished finitePrefix Result has 3227 conditions, 1327 events. 819/1327 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 8408 event pairs, 103 based on Foata normal form. 35/1169 useless extension candidates. Maximal degree in co-relation 3214. Up to 474 conditions per place. [2020-10-16 05:12:53,610 INFO L132 encePairwiseOnDemand]: 152/159 looper letters, 37 selfloop transitions, 15 changer transitions 1/60 dead transitions. [2020-10-16 05:12:53,611 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 60 transitions, 289 flow [2020-10-16 05:12:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 05:12:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 05:12:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 740 transitions. [2020-10-16 05:12:53,615 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6648697214734951 [2020-10-16 05:12:53,615 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 740 transitions. [2020-10-16 05:12:53,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 740 transitions. [2020-10-16 05:12:53,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:12:53,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 740 transitions. [2020-10-16 05:12:53,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 05:12:53,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 05:12:53,621 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 05:12:53,621 INFO L185 Difference]: Start difference. First operand has 31 places, 22 transitions, 81 flow. Second operand 7 states and 740 transitions. [2020-10-16 05:12:53,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 60 transitions, 289 flow [2020-10-16 05:12:53,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 60 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:12:53,624 INFO L241 Difference]: Finished difference. Result has 41 places, 33 transitions, 191 flow [2020-10-16 05:12:53,624 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=191, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2020-10-16 05:12:53,625 INFO L342 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2020-10-16 05:12:53,625 INFO L481 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 191 flow [2020-10-16 05:12:53,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 05:12:53,625 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:12:53,626 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:12:53,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-16 05:12:53,627 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:12:53,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:12:53,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1094876323, now seen corresponding path program 1 times [2020-10-16 05:12:53,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:12:53,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520369497] [2020-10-16 05:12:53,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:12:53,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:12:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:12:53,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520369497] [2020-10-16 05:12:53,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:12:53,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:12:53,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700893799] [2020-10-16 05:12:53,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 05:12:53,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:12:53,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 05:12:53,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 05:12:53,700 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 159 [2020-10-16 05:12:53,701 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 191 flow. Second operand 5 states. [2020-10-16 05:12:53,701 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:12:53,701 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 159 [2020-10-16 05:12:53,701 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:12:54,112 INFO L129 PetriNetUnfolder]: 1044/1800 cut-off events. [2020-10-16 05:12:54,112 INFO L130 PetriNetUnfolder]: For 2003/2003 co-relation queries the response was YES. [2020-10-16 05:12:54,118 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6044 conditions, 1800 events. 1044/1800 cut-off events. For 2003/2003 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 13024 event pairs, 158 based on Foata normal form. 47/1580 useless extension candidates. Maximal degree in co-relation 6025. Up to 651 conditions per place. [2020-10-16 05:12:54,131 INFO L132 encePairwiseOnDemand]: 152/159 looper letters, 46 selfloop transitions, 29 changer transitions 1/83 dead transitions. [2020-10-16 05:12:54,131 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 83 transitions, 606 flow [2020-10-16 05:12:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 05:12:54,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 05:12:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 735 transitions. [2020-10-16 05:12:54,135 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.660377358490566 [2020-10-16 05:12:54,135 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 735 transitions. [2020-10-16 05:12:54,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 735 transitions. [2020-10-16 05:12:54,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:12:54,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 735 transitions. [2020-10-16 05:12:54,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 05:12:54,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 05:12:54,141 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 05:12:54,141 INFO L185 Difference]: Start difference. First operand has 41 places, 33 transitions, 191 flow. Second operand 7 states and 735 transitions. [2020-10-16 05:12:54,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 83 transitions, 606 flow [2020-10-16 05:12:54,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 83 transitions, 587 flow, removed 5 selfloop flow, removed 1 redundant places. [2020-10-16 05:12:54,158 INFO L241 Difference]: Finished difference. Result has 51 places, 54 transitions, 462 flow [2020-10-16 05:12:54,158 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=462, PETRI_PLACES=51, PETRI_TRANSITIONS=54} [2020-10-16 05:12:54,159 INFO L342 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2020-10-16 05:12:54,159 INFO L481 AbstractCegarLoop]: Abstraction has has 51 places, 54 transitions, 462 flow [2020-10-16 05:12:54,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 05:12:54,159 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:12:54,159 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:12:54,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-16 05:12:54,160 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:12:54,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:12:54,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1288707331, now seen corresponding path program 1 times [2020-10-16 05:12:54,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:12:54,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677092090] [2020-10-16 05:12:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:12:54,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:12:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:12:54,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677092090] [2020-10-16 05:12:54,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316056176] [2020-10-16 05:12:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:12:54,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:12:54,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 05:12:54,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:12:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:12:54,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:12:54,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-16 05:12:54,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128249641] [2020-10-16 05:12:54,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 05:12:54,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:12:54,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 05:12:54,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-16 05:12:54,538 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 159 [2020-10-16 05:12:54,539 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 54 transitions, 462 flow. Second operand 18 states. [2020-10-16 05:12:54,539 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:12:54,539 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 159 [2020-10-16 05:12:54,539 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:12:55,604 INFO L129 PetriNetUnfolder]: 2284/3943 cut-off events. [2020-10-16 05:12:55,605 INFO L130 PetriNetUnfolder]: For 9293/9293 co-relation queries the response was YES. [2020-10-16 05:12:55,622 INFO L80 FinitePrefix]: Finished finitePrefix Result has 16546 conditions, 3943 events. 2284/3943 cut-off events. For 9293/9293 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 27274 event pairs, 392 based on Foata normal form. 15/3533 useless extension candidates. Maximal degree in co-relation 16521. Up to 1355 conditions per place. [2020-10-16 05:12:55,650 INFO L132 encePairwiseOnDemand]: 147/159 looper letters, 103 selfloop transitions, 77 changer transitions 5/189 dead transitions. [2020-10-16 05:12:55,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 189 transitions, 1663 flow [2020-10-16 05:12:55,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 05:12:55,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-16 05:12:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1809 transitions. [2020-10-16 05:12:55,657 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5688679245283019 [2020-10-16 05:12:55,657 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1809 transitions. [2020-10-16 05:12:55,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1809 transitions. [2020-10-16 05:12:55,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:12:55,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1809 transitions. [2020-10-16 05:12:55,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 21 states. [2020-10-16 05:12:55,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 21 states. [2020-10-16 05:12:55,667 INFO L81 ComplementDD]: Finished complementDD. Result 21 states. [2020-10-16 05:12:55,667 INFO L185 Difference]: Start difference. First operand has 51 places, 54 transitions, 462 flow. Second operand 20 states and 1809 transitions. [2020-10-16 05:12:55,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 189 transitions, 1663 flow [2020-10-16 05:12:55,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 189 transitions, 1637 flow, removed 13 selfloop flow, removed 0 redundant places. [2020-10-16 05:12:55,740 INFO L241 Difference]: Finished difference. Result has 81 places, 103 transitions, 1228 flow [2020-10-16 05:12:55,740 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1228, PETRI_PLACES=81, PETRI_TRANSITIONS=103} [2020-10-16 05:12:55,740 INFO L342 CegarLoopForPetriNet]: 29 programPoint places, 52 predicate places. [2020-10-16 05:12:55,741 INFO L481 AbstractCegarLoop]: Abstraction has has 81 places, 103 transitions, 1228 flow [2020-10-16 05:12:55,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 05:12:55,741 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:12:55,741 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:12:55,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-16 05:12:55,955 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:12:55,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:12:55,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2128951409, now seen corresponding path program 2 times [2020-10-16 05:12:55,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:12:55,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249717670] [2020-10-16 05:12:55,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:12:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:12:56,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:12:56,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249717670] [2020-10-16 05:12:56,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011688112] [2020-10-16 05:12:56,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:12:56,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 05:12:56,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 05:12:56,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 05:12:56,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:12:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:12:56,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:12:56,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-16 05:12:56,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510891281] [2020-10-16 05:12:56,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 05:12:56,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:12:56,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 05:12:56,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-16 05:12:56,239 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 159 [2020-10-16 05:12:56,240 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 103 transitions, 1228 flow. Second operand 18 states. [2020-10-16 05:12:56,240 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:12:56,240 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 159 [2020-10-16 05:12:56,240 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:12:59,075 INFO L129 PetriNetUnfolder]: 5538/9917 cut-off events. [2020-10-16 05:12:59,075 INFO L130 PetriNetUnfolder]: For 50772/50772 co-relation queries the response was YES. [2020-10-16 05:12:59,247 INFO L80 FinitePrefix]: Finished finitePrefix Result has 52231 conditions, 9917 events. 5538/9917 cut-off events. For 50772/50772 co-relation queries the response was YES. Maximal size of possible extension queue 998. Compared 83610 event pairs, 473 based on Foata normal form. 27/9938 useless extension candidates. Maximal degree in co-relation 52193. Up to 3234 conditions per place. [2020-10-16 05:12:59,314 INFO L132 encePairwiseOnDemand]: 147/159 looper letters, 268 selfloop transitions, 289 changer transitions 6/567 dead transitions. [2020-10-16 05:12:59,314 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 567 transitions, 6919 flow [2020-10-16 05:12:59,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-16 05:12:59,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-16 05:12:59,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4248 transitions. [2020-10-16 05:12:59,334 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5684464070654356 [2020-10-16 05:12:59,334 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4248 transitions. [2020-10-16 05:12:59,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4248 transitions. [2020-10-16 05:12:59,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:12:59,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4248 transitions. [2020-10-16 05:12:59,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 48 states. [2020-10-16 05:12:59,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 48 states. [2020-10-16 05:12:59,360 INFO L81 ComplementDD]: Finished complementDD. Result 48 states. [2020-10-16 05:12:59,360 INFO L185 Difference]: Start difference. First operand has 81 places, 103 transitions, 1228 flow. Second operand 47 states and 4248 transitions. [2020-10-16 05:12:59,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 567 transitions, 6919 flow [2020-10-16 05:12:59,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 567 transitions, 6508 flow, removed 174 selfloop flow, removed 3 redundant places. [2020-10-16 05:12:59,908 INFO L241 Difference]: Finished difference. Result has 152 places, 336 transitions, 5072 flow [2020-10-16 05:12:59,908 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=5072, PETRI_PLACES=152, PETRI_TRANSITIONS=336} [2020-10-16 05:12:59,908 INFO L342 CegarLoopForPetriNet]: 29 programPoint places, 123 predicate places. [2020-10-16 05:12:59,909 INFO L481 AbstractCegarLoop]: Abstraction has has 152 places, 336 transitions, 5072 flow [2020-10-16 05:12:59,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 05:12:59,909 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:12:59,909 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:13:00,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-16 05:13:00,124 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:13:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:13:00,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1399813799, now seen corresponding path program 3 times [2020-10-16 05:13:00,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:13:00,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883654845] [2020-10-16 05:13:00,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:13:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:13:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:13:00,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883654845] [2020-10-16 05:13:00,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331608467] [2020-10-16 05:13:00,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:13:00,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 05:13:00,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 05:13:00,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 05:13:00,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:13:00,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:13:00,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:13:00,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-16 05:13:00,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539667642] [2020-10-16 05:13:00,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 05:13:00,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:13:00,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 05:13:00,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-16 05:13:00,407 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 159 [2020-10-16 05:13:00,408 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 336 transitions, 5072 flow. Second operand 18 states. [2020-10-16 05:13:00,408 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:13:00,408 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 159 [2020-10-16 05:13:00,409 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:13:04,874 INFO L129 PetriNetUnfolder]: 6572/12435 cut-off events. [2020-10-16 05:13:04,875 INFO L130 PetriNetUnfolder]: For 179325/179331 co-relation queries the response was YES. [2020-10-16 05:13:04,952 INFO L80 FinitePrefix]: Finished finitePrefix Result has 90864 conditions, 12435 events. 6572/12435 cut-off events. For 179325/179331 co-relation queries the response was YES. Maximal size of possible extension queue 1292. Compared 115181 event pairs, 418 based on Foata normal form. 70/12504 useless extension candidates. Maximal degree in co-relation 90798. Up to 2699 conditions per place. [2020-10-16 05:13:05,012 INFO L132 encePairwiseOnDemand]: 147/159 looper letters, 187 selfloop transitions, 428 changer transitions 55/674 dead transitions. [2020-10-16 05:13:05,012 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 674 transitions, 11003 flow [2020-10-16 05:13:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 05:13:05,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-16 05:13:05,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2858 transitions. [2020-10-16 05:13:05,017 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5617138364779874 [2020-10-16 05:13:05,017 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2858 transitions. [2020-10-16 05:13:05,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2858 transitions. [2020-10-16 05:13:05,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:13:05,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2858 transitions. [2020-10-16 05:13:05,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-16 05:13:05,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-16 05:13:05,029 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-16 05:13:05,029 INFO L185 Difference]: Start difference. First operand has 152 places, 336 transitions, 5072 flow. Second operand 32 states and 2858 transitions. [2020-10-16 05:13:05,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 674 transitions, 11003 flow [2020-10-16 05:13:06,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 674 transitions, 10546 flow, removed 189 selfloop flow, removed 5 redundant places. [2020-10-16 05:13:06,726 INFO L241 Difference]: Finished difference. Result has 191 places, 489 transitions, 8602 flow [2020-10-16 05:13:06,727 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=4771, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=8602, PETRI_PLACES=191, PETRI_TRANSITIONS=489} [2020-10-16 05:13:06,727 INFO L342 CegarLoopForPetriNet]: 29 programPoint places, 162 predicate places. [2020-10-16 05:13:06,727 INFO L481 AbstractCegarLoop]: Abstraction has has 191 places, 489 transitions, 8602 flow [2020-10-16 05:13:06,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 05:13:06,727 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:13:06,727 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:13:06,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 05:13:06,928 INFO L429 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:13:06,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:13:06,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1923102279, now seen corresponding path program 4 times [2020-10-16 05:13:06,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:13:06,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371484966] [2020-10-16 05:13:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:13:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:13:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:13:07,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371484966] [2020-10-16 05:13:07,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586208382] [2020-10-16 05:13:07,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:13:07,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 05:13:07,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 05:13:07,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 05:13:07,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:13:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:13:07,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:13:07,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-16 05:13:07,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002755639] [2020-10-16 05:13:07,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 05:13:07,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:13:07,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 05:13:07,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-16 05:13:07,211 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 159 [2020-10-16 05:13:07,212 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 489 transitions, 8602 flow. Second operand 18 states. [2020-10-16 05:13:07,212 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:13:07,212 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 159 [2020-10-16 05:13:07,212 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:13:10,959 INFO L129 PetriNetUnfolder]: 6780/13310 cut-off events. [2020-10-16 05:13:10,959 INFO L130 PetriNetUnfolder]: For 302116/302138 co-relation queries the response was YES. [2020-10-16 05:13:11,087 INFO L80 FinitePrefix]: Finished finitePrefix Result has 118257 conditions, 13310 events. 6780/13310 cut-off events. For 302116/302138 co-relation queries the response was YES. Maximal size of possible extension queue 1454. Compared 129101 event pairs, 520 based on Foata normal form. 41/13348 useless extension candidates. Maximal degree in co-relation 118179. Up to 3420 conditions per place. [2020-10-16 05:13:11,174 INFO L132 encePairwiseOnDemand]: 147/159 looper letters, 192 selfloop transitions, 549 changer transitions 69/814 dead transitions. [2020-10-16 05:13:11,174 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 814 transitions, 15693 flow [2020-10-16 05:13:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-16 05:13:11,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-16 05:13:11,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2926 transitions. [2020-10-16 05:13:11,180 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5576519916142557 [2020-10-16 05:13:11,180 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2926 transitions. [2020-10-16 05:13:11,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2926 transitions. [2020-10-16 05:13:11,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:13:11,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2926 transitions. [2020-10-16 05:13:11,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 34 states. [2020-10-16 05:13:11,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 34 states. [2020-10-16 05:13:11,192 INFO L81 ComplementDD]: Finished complementDD. Result 34 states. [2020-10-16 05:13:11,192 INFO L185 Difference]: Start difference. First operand has 191 places, 489 transitions, 8602 flow. Second operand 33 states and 2926 transitions. [2020-10-16 05:13:11,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 814 transitions, 15693 flow [2020-10-16 05:13:15,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 814 transitions, 15354 flow, removed 117 selfloop flow, removed 13 redundant places. [2020-10-16 05:13:15,131 INFO L241 Difference]: Finished difference. Result has 218 places, 624 transitions, 12828 flow [2020-10-16 05:13:15,132 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=8357, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=415, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=12828, PETRI_PLACES=218, PETRI_TRANSITIONS=624} [2020-10-16 05:13:15,132 INFO L342 CegarLoopForPetriNet]: 29 programPoint places, 189 predicate places. [2020-10-16 05:13:15,132 INFO L481 AbstractCegarLoop]: Abstraction has has 218 places, 624 transitions, 12828 flow [2020-10-16 05:13:15,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 05:13:15,132 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:13:15,132 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:13:15,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:13:15,338 INFO L429 AbstractCegarLoop]: === Iteration 8 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:13:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:13:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash 90847801, now seen corresponding path program 5 times [2020-10-16 05:13:15,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:13:15,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460199926] [2020-10-16 05:13:15,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:13:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:13:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:13:15,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460199926] [2020-10-16 05:13:15,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636849161] [2020-10-16 05:13:15,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:13:15,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 05:13:15,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 05:13:15,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 05:13:15,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:13:15,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:13:15,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:13:15,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-16 05:13:15,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153678958] [2020-10-16 05:13:15,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 05:13:15,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:13:15,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 05:13:15,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-16 05:13:15,619 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 159 [2020-10-16 05:13:15,620 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 624 transitions, 12828 flow. Second operand 18 states. [2020-10-16 05:13:15,620 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:13:15,620 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 159 [2020-10-16 05:13:15,621 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:13:21,067 INFO L129 PetriNetUnfolder]: 6714/13271 cut-off events. [2020-10-16 05:13:21,067 INFO L130 PetriNetUnfolder]: For 377386/377420 co-relation queries the response was YES. [2020-10-16 05:13:21,223 INFO L80 FinitePrefix]: Finished finitePrefix Result has 128160 conditions, 13271 events. 6714/13271 cut-off events. For 377386/377420 co-relation queries the response was YES. Maximal size of possible extension queue 1461. Compared 129210 event pairs, 1099 based on Foata normal form. 49/13320 useless extension candidates. Maximal degree in co-relation 128072. Up to 3416 conditions per place. [2020-10-16 05:13:21,305 INFO L132 encePairwiseOnDemand]: 148/159 looper letters, 286 selfloop transitions, 507 changer transitions 7/804 dead transitions. [2020-10-16 05:13:21,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 804 transitions, 17378 flow [2020-10-16 05:13:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 05:13:21,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-16 05:13:21,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2608 transitions. [2020-10-16 05:13:21,309 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5656039904576013 [2020-10-16 05:13:21,310 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2608 transitions. [2020-10-16 05:13:21,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2608 transitions. [2020-10-16 05:13:21,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:13:21,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2608 transitions. [2020-10-16 05:13:21,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 30 states. [2020-10-16 05:13:21,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 30 states. [2020-10-16 05:13:21,318 INFO L81 ComplementDD]: Finished complementDD. Result 30 states. [2020-10-16 05:13:21,318 INFO L185 Difference]: Start difference. First operand has 218 places, 624 transitions, 12828 flow. Second operand 29 states and 2608 transitions. [2020-10-16 05:13:21,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 804 transitions, 17378 flow [2020-10-16 05:13:27,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 804 transitions, 16986 flow, removed 109 selfloop flow, removed 17 redundant places. [2020-10-16 05:13:27,785 INFO L241 Difference]: Finished difference. Result has 229 places, 640 transitions, 14011 flow [2020-10-16 05:13:27,785 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=12558, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14011, PETRI_PLACES=229, PETRI_TRANSITIONS=640} [2020-10-16 05:13:27,785 INFO L342 CegarLoopForPetriNet]: 29 programPoint places, 200 predicate places. [2020-10-16 05:13:27,786 INFO L481 AbstractCegarLoop]: Abstraction has has 229 places, 640 transitions, 14011 flow [2020-10-16 05:13:27,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-16 05:13:27,786 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:13:27,786 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:13:27,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 05:13:27,987 INFO L429 AbstractCegarLoop]: === Iteration 9 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:13:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:13:27,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1190123558, now seen corresponding path program 1 times [2020-10-16 05:13:27,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:13:27,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057595913] [2020-10-16 05:13:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:13:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:13:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-16 05:13:28,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057595913] [2020-10-16 05:13:28,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:13:28,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:13:28,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733091127] [2020-10-16 05:13:28,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 05:13:28,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:13:28,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 05:13:28,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 05:13:28,027 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 159 [2020-10-16 05:13:28,027 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 640 transitions, 14011 flow. Second operand 5 states. [2020-10-16 05:13:28,027 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:13:28,027 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 159 [2020-10-16 05:13:28,027 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:13:31,862 INFO L129 PetriNetUnfolder]: 7040/14402 cut-off events. [2020-10-16 05:13:31,863 INFO L130 PetriNetUnfolder]: For 452749/455417 co-relation queries the response was YES. [2020-10-16 05:13:32,053 INFO L80 FinitePrefix]: Finished finitePrefix Result has 144387 conditions, 14402 events. 7040/14402 cut-off events. For 452749/455417 co-relation queries the response was YES. Maximal size of possible extension queue 1979. Compared 152666 event pairs, 948 based on Foata normal form. 670/14554 useless extension candidates. Maximal degree in co-relation 144296. Up to 5263 conditions per place. [2020-10-16 05:13:32,137 INFO L132 encePairwiseOnDemand]: 152/159 looper letters, 493 selfloop transitions, 505 changer transitions 36/1061 dead transitions. [2020-10-16 05:13:32,137 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 1061 transitions, 25118 flow [2020-10-16 05:13:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 05:13:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 05:13:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 742 transitions. [2020-10-16 05:13:32,139 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2020-10-16 05:13:32,139 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 742 transitions. [2020-10-16 05:13:32,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 742 transitions. [2020-10-16 05:13:32,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:13:32,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 742 transitions. [2020-10-16 05:13:32,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 05:13:32,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 05:13:32,142 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 05:13:32,142 INFO L185 Difference]: Start difference. First operand has 229 places, 640 transitions, 14011 flow. Second operand 7 states and 742 transitions. [2020-10-16 05:13:32,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 1061 transitions, 25118 flow [2020-10-16 05:13:41,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 1061 transitions, 24368 flow, removed 74 selfloop flow, removed 17 redundant places. [2020-10-16 05:13:41,291 INFO L241 Difference]: Finished difference. Result has 223 places, 911 transitions, 22208 flow [2020-10-16 05:13:41,292 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=13560, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22208, PETRI_PLACES=223, PETRI_TRANSITIONS=911} [2020-10-16 05:13:41,293 INFO L342 CegarLoopForPetriNet]: 29 programPoint places, 194 predicate places. [2020-10-16 05:13:41,293 INFO L481 AbstractCegarLoop]: Abstraction has has 223 places, 911 transitions, 22208 flow [2020-10-16 05:13:41,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 05:13:41,293 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:13:41,293 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:13:41,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-16 05:13:41,294 INFO L429 AbstractCegarLoop]: === Iteration 10 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-16 05:13:41,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:13:41,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1764914331, now seen corresponding path program 1 times [2020-10-16 05:13:41,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:13:41,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210951450] [2020-10-16 05:13:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:13:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:13:41,305 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:13:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-16 05:13:41,313 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-16 05:13:41,319 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-16 05:13:41,320 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-16 05:13:41,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-16 05:13:41,320 WARN L264 etLargeBlockEncoding]: Failed to translate choice composition: Branch encoders not available. [2020-10-16 05:13:41,321 WARN L371 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-16 05:13:41,321 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-16 05:13:41,333 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,333 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,333 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,334 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,334 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,334 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,334 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,334 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,334 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,335 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,335 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,335 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,335 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,335 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,335 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,336 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,336 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,336 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,336 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,336 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,336 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,337 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,337 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,337 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,337 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,337 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,337 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,338 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,338 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,338 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,338 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,338 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,338 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,339 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,339 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,339 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,339 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,339 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,340 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,340 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,340 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,340 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,340 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,340 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,340 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,341 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,341 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,341 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,341 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,341 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,342 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,342 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,342 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,342 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,342 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,342 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,343 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,343 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,343 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,343 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,343 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,344 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,344 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,344 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,344 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,344 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,344 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,345 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,345 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,345 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,345 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,345 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,346 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,346 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,346 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,346 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,346 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,346 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,347 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,347 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,347 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,347 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,347 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,347 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,348 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,348 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,348 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,348 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,348 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,348 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,349 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,350 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,350 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,350 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,350 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,350 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,355 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,356 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,356 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,356 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,356 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,356 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,357 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,357 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,357 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,358 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork0___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,358 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,358 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork0___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,359 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,359 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,359 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,359 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,359 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,360 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,360 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,360 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,360 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,360 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,369 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,369 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,369 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,369 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,369 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,370 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,370 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,371 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,371 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,371 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 05:13:41,372 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-10-16 05:13:41,373 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 05:13:41,373 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 05:13:41,373 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 05:13:41,373 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 05:13:41,373 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 05:13:41,373 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 05:13:41,373 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 05:13:41,373 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 05:13:41,375 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 127 places, 115 transitions, 294 flow [2020-10-16 05:13:41,384 INFO L129 PetriNetUnfolder]: 7/137 cut-off events. [2020-10-16 05:13:41,384 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-10-16 05:13:41,385 INFO L80 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 137 events. 7/137 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 233 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 157. Up to 10 conditions per place. [2020-10-16 05:13:41,385 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 115 transitions, 294 flow [2020-10-16 05:13:41,385 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 81 transitions, 197 flow [2020-10-16 05:13:41,386 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 05:13:41,386 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 90 places, 81 transitions, 197 flow [2020-10-16 05:13:41,386 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 90 places, 81 transitions, 197 flow [2020-10-16 05:13:41,386 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 90 places, 81 transitions, 197 flow [2020-10-16 05:13:41,393 INFO L129 PetriNetUnfolder]: 7/137 cut-off events. [2020-10-16 05:13:41,393 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-10-16 05:13:41,394 INFO L80 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 137 events. 7/137 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 218 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 130. Up to 10 conditions per place. [2020-10-16 05:13:41,396 INFO L117 LiptonReduction]: Number of co-enabled transitions 2192 [2020-10-16 05:13:42,524 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-16 05:13:42,744 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-16 05:13:42,817 INFO L132 LiptonReduction]: Checked pairs total: 3265 [2020-10-16 05:13:42,818 INFO L134 LiptonReduction]: Total number of compositions: 67 [2020-10-16 05:13:42,818 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1432 [2020-10-16 05:13:42,819 INFO L129 PetriNetUnfolder]: 0/3 cut-off events. [2020-10-16 05:13:42,819 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-16 05:13:42,819 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:13:42,819 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2020-10-16 05:13:42,819 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 05:13:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:13:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash 777173, now seen corresponding path program 1 times [2020-10-16 05:13:42,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:13:42,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268498332] [2020-10-16 05:13:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:13:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:13:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:13:42,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268498332] [2020-10-16 05:13:42,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:13:42,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-10-16 05:13:42,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928992687] [2020-10-16 05:13:42,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 05:13:42,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:13:42,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 05:13:42,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 05:13:42,838 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 182 [2020-10-16 05:13:42,839 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 22 transitions, 79 flow. Second operand 3 states. [2020-10-16 05:13:42,839 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:13:42,839 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 182 [2020-10-16 05:13:42,839 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:13:43,017 INFO L129 PetriNetUnfolder]: 2434/3340 cut-off events. [2020-10-16 05:13:43,017 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-10-16 05:13:43,022 INFO L80 FinitePrefix]: Finished finitePrefix Result has 6692 conditions, 3340 events. 2434/3340 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 18037 event pairs, 518 based on Foata normal form. 0/2711 useless extension candidates. Maximal degree in co-relation 6680. Up to 2863 conditions per place. [2020-10-16 05:13:43,029 INFO L132 encePairwiseOnDemand]: 176/182 looper letters, 19 selfloop transitions, 5 changer transitions 0/33 dead transitions. [2020-10-16 05:13:43,029 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 149 flow [2020-10-16 05:13:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 05:13:43,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 05:13:43,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 373 transitions. [2020-10-16 05:13:43,030 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6831501831501832 [2020-10-16 05:13:43,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 373 transitions. [2020-10-16 05:13:43,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 373 transitions. [2020-10-16 05:13:43,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:13:43,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 373 transitions. [2020-10-16 05:13:43,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 05:13:43,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 05:13:43,032 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 05:13:43,032 INFO L185 Difference]: Start difference. First operand has 34 places, 22 transitions, 79 flow. Second operand 3 states and 373 transitions. [2020-10-16 05:13:43,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 149 flow [2020-10-16 05:13:43,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 136 flow, removed 6 selfloop flow, removed 1 redundant places. [2020-10-16 05:13:43,034 INFO L241 Difference]: Finished difference. Result has 36 places, 26 transitions, 99 flow [2020-10-16 05:13:43,034 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=36, PETRI_TRANSITIONS=26} [2020-10-16 05:13:43,034 INFO L342 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2020-10-16 05:13:43,034 INFO L481 AbstractCegarLoop]: Abstraction has has 36 places, 26 transitions, 99 flow [2020-10-16 05:13:43,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 05:13:43,034 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:13:43,034 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:13:43,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-16 05:13:43,035 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 05:13:43,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:13:43,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1370069388, now seen corresponding path program 1 times [2020-10-16 05:13:43,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:13:43,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898932444] [2020-10-16 05:13:43,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:13:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:13:43,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:13:43,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898932444] [2020-10-16 05:13:43,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:13:43,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:13:43,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007312703] [2020-10-16 05:13:43,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 05:13:43,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:13:43,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 05:13:43,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 05:13:43,074 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 182 [2020-10-16 05:13:43,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 26 transitions, 99 flow. Second operand 5 states. [2020-10-16 05:13:43,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:13:43,075 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 182 [2020-10-16 05:13:43,075 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:13:43,504 INFO L129 PetriNetUnfolder]: 4099/5877 cut-off events. [2020-10-16 05:13:43,504 INFO L130 PetriNetUnfolder]: For 633/633 co-relation queries the response was YES. [2020-10-16 05:13:43,514 INFO L80 FinitePrefix]: Finished finitePrefix Result has 14350 conditions, 5877 events. 4099/5877 cut-off events. For 633/633 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 38941 event pairs, 508 based on Foata normal form. 107/5313 useless extension candidates. Maximal degree in co-relation 14336. Up to 2328 conditions per place. [2020-10-16 05:13:43,529 INFO L132 encePairwiseOnDemand]: 174/182 looper letters, 45 selfloop transitions, 19 changer transitions 1/73 dead transitions. [2020-10-16 05:13:43,529 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 73 transitions, 358 flow [2020-10-16 05:13:43,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 05:13:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 05:13:43,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 857 transitions. [2020-10-16 05:13:43,530 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6726844583987441 [2020-10-16 05:13:43,531 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 857 transitions. [2020-10-16 05:13:43,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 857 transitions. [2020-10-16 05:13:43,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:13:43,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 857 transitions. [2020-10-16 05:13:43,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 05:13:43,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 05:13:43,533 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 05:13:43,533 INFO L185 Difference]: Start difference. First operand has 36 places, 26 transitions, 99 flow. Second operand 7 states and 857 transitions. [2020-10-16 05:13:43,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 73 transitions, 358 flow [2020-10-16 05:13:43,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 73 transitions, 350 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 05:13:43,535 INFO L241 Difference]: Finished difference. Result has 46 places, 40 transitions, 239 flow [2020-10-16 05:13:43,535 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=239, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2020-10-16 05:13:43,535 INFO L342 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2020-10-16 05:13:43,535 INFO L481 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 239 flow [2020-10-16 05:13:43,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 05:13:43,536 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:13:43,536 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:13:43,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-16 05:13:43,536 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 05:13:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:13:43,536 INFO L82 PathProgramCache]: Analyzing trace with hash 450491119, now seen corresponding path program 1 times [2020-10-16 05:13:43,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:13:43,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941386708] [2020-10-16 05:13:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:13:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:13:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 05:13:43,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941386708] [2020-10-16 05:13:43,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:13:43,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:13:43,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980502197] [2020-10-16 05:13:43,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 05:13:43,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:13:43,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 05:13:43,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 05:13:43,587 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 182 [2020-10-16 05:13:43,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 239 flow. Second operand 5 states. [2020-10-16 05:13:43,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:13:43,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 182 [2020-10-16 05:13:43,588 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:13:44,239 INFO L129 PetriNetUnfolder]: 6136/9114 cut-off events. [2020-10-16 05:13:44,239 INFO L130 PetriNetUnfolder]: For 8797/8797 co-relation queries the response was YES. [2020-10-16 05:13:44,269 INFO L80 FinitePrefix]: Finished finitePrefix Result has 31092 conditions, 9114 events. 6136/9114 cut-off events. For 8797/8797 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 68077 event pairs, 865 based on Foata normal form. 157/8176 useless extension candidates. Maximal degree in co-relation 31072. Up to 3718 conditions per place. [2020-10-16 05:13:44,297 INFO L132 encePairwiseOnDemand]: 174/182 looper letters, 56 selfloop transitions, 39 changer transitions 1/104 dead transitions. [2020-10-16 05:13:44,297 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 104 transitions, 775 flow [2020-10-16 05:13:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 05:13:44,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 05:13:44,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 859 transitions. [2020-10-16 05:13:44,298 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67425431711146 [2020-10-16 05:13:44,298 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 859 transitions. [2020-10-16 05:13:44,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 859 transitions. [2020-10-16 05:13:44,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:13:44,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 859 transitions. [2020-10-16 05:13:44,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 05:13:44,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 05:13:44,301 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 05:13:44,301 INFO L185 Difference]: Start difference. First operand has 46 places, 40 transitions, 239 flow. Second operand 7 states and 859 transitions. [2020-10-16 05:13:44,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 104 transitions, 775 flow [2020-10-16 05:13:44,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 104 transitions, 746 flow, removed 8 selfloop flow, removed 1 redundant places. [2020-10-16 05:13:44,317 INFO L241 Difference]: Finished difference. Result has 56 places, 68 transitions, 599 flow [2020-10-16 05:13:44,317 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=599, PETRI_PLACES=56, PETRI_TRANSITIONS=68} [2020-10-16 05:13:44,317 INFO L342 CegarLoopForPetriNet]: 34 programPoint places, 22 predicate places. [2020-10-16 05:13:44,317 INFO L481 AbstractCegarLoop]: Abstraction has has 56 places, 68 transitions, 599 flow [2020-10-16 05:13:44,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 05:13:44,317 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:13:44,317 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:13:44,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-16 05:13:44,317 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 05:13:44,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:13:44,318 INFO L82 PathProgramCache]: Analyzing trace with hash 258793303, now seen corresponding path program 1 times [2020-10-16 05:13:44,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:13:44,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478412855] [2020-10-16 05:13:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:13:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:13:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:13:44,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478412855] [2020-10-16 05:13:44,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063781366] [2020-10-16 05:13:44,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:13:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:13:44,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 05:13:44,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:13:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:13:44,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:13:44,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 05:13:44,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634857704] [2020-10-16 05:13:44,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 05:13:44,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:13:44,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 05:13:44,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-16 05:13:44,595 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 182 [2020-10-16 05:13:44,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 68 transitions, 599 flow. Second operand 17 states. [2020-10-16 05:13:44,596 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:13:44,596 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 182 [2020-10-16 05:13:44,596 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:13:46,750 INFO L129 PetriNetUnfolder]: 13788/20778 cut-off events. [2020-10-16 05:13:46,750 INFO L130 PetriNetUnfolder]: For 46871/46871 co-relation queries the response was YES. [2020-10-16 05:13:46,848 INFO L80 FinitePrefix]: Finished finitePrefix Result has 87958 conditions, 20778 events. 13788/20778 cut-off events. For 46871/46871 co-relation queries the response was YES. Maximal size of possible extension queue 1399. Compared 148199 event pairs, 2624 based on Foata normal form. 48/19006 useless extension candidates. Maximal degree in co-relation 87932. Up to 7944 conditions per place. [2020-10-16 05:13:46,917 INFO L132 encePairwiseOnDemand]: 169/182 looper letters, 133 selfloop transitions, 116 changer transitions 18/272 dead transitions. [2020-10-16 05:13:46,917 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 272 transitions, 2517 flow [2020-10-16 05:13:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-16 05:13:46,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-16 05:13:46,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2503 transitions. [2020-10-16 05:13:46,921 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5979455327281414 [2020-10-16 05:13:46,921 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2503 transitions. [2020-10-16 05:13:46,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2503 transitions. [2020-10-16 05:13:46,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:13:46,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2503 transitions. [2020-10-16 05:13:46,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 24 states. [2020-10-16 05:13:46,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 24 states. [2020-10-16 05:13:46,929 INFO L81 ComplementDD]: Finished complementDD. Result 24 states. [2020-10-16 05:13:46,929 INFO L185 Difference]: Start difference. First operand has 56 places, 68 transitions, 599 flow. Second operand 23 states and 2503 transitions. [2020-10-16 05:13:46,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 272 transitions, 2517 flow [2020-10-16 05:13:47,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 272 transitions, 2463 flow, removed 27 selfloop flow, removed 0 redundant places. [2020-10-16 05:13:47,382 INFO L241 Difference]: Finished difference. Result has 90 places, 148 transitions, 1830 flow [2020-10-16 05:13:47,382 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1830, PETRI_PLACES=90, PETRI_TRANSITIONS=148} [2020-10-16 05:13:47,382 INFO L342 CegarLoopForPetriNet]: 34 programPoint places, 56 predicate places. [2020-10-16 05:13:47,382 INFO L481 AbstractCegarLoop]: Abstraction has has 90 places, 148 transitions, 1830 flow [2020-10-16 05:13:47,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 05:13:47,383 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:13:47,383 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:13:47,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:13:47,597 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 05:13:47,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:13:47,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1914532745, now seen corresponding path program 2 times [2020-10-16 05:13:47,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:13:47,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963967038] [2020-10-16 05:13:47,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:13:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:13:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:13:47,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963967038] [2020-10-16 05:13:47,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245307632] [2020-10-16 05:13:47,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:13:47,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 05:13:47,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 05:13:47,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 05:13:47,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:13:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:13:47,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:13:47,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 05:13:47,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134069756] [2020-10-16 05:13:47,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 05:13:47,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:13:47,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 05:13:47,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-16 05:13:47,837 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 182 [2020-10-16 05:13:47,838 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 148 transitions, 1830 flow. Second operand 17 states. [2020-10-16 05:13:47,838 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:13:47,838 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 182 [2020-10-16 05:13:47,838 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:13:51,672 INFO L129 PetriNetUnfolder]: 16736/26704 cut-off events. [2020-10-16 05:13:51,672 INFO L130 PetriNetUnfolder]: For 137539/137539 co-relation queries the response was YES. [2020-10-16 05:13:51,856 INFO L80 FinitePrefix]: Finished finitePrefix Result has 142554 conditions, 26704 events. 16736/26704 cut-off events. For 137539/137539 co-relation queries the response was YES. Maximal size of possible extension queue 1984. Compared 216001 event pairs, 1325 based on Foata normal form. 61/26743 useless extension candidates. Maximal degree in co-relation 142514. Up to 8871 conditions per place. [2020-10-16 05:13:51,950 INFO L132 encePairwiseOnDemand]: 169/182 looper letters, 172 selfloop transitions, 272 changer transitions 79/528 dead transitions. [2020-10-16 05:13:51,951 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 528 transitions, 6645 flow [2020-10-16 05:13:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-16 05:13:51,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-16 05:13:51,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3887 transitions. [2020-10-16 05:13:51,956 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5932539682539683 [2020-10-16 05:13:51,956 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3887 transitions. [2020-10-16 05:13:51,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3887 transitions. [2020-10-16 05:13:51,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:13:51,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3887 transitions. [2020-10-16 05:13:51,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 37 states. [2020-10-16 05:13:51,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 37 states. [2020-10-16 05:13:51,971 INFO L81 ComplementDD]: Finished complementDD. Result 37 states. [2020-10-16 05:13:51,972 INFO L185 Difference]: Start difference. First operand has 90 places, 148 transitions, 1830 flow. Second operand 36 states and 3887 transitions. [2020-10-16 05:13:51,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 528 transitions, 6645 flow [2020-10-16 05:13:54,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 528 transitions, 6233 flow, removed 191 selfloop flow, removed 3 redundant places. [2020-10-16 05:13:54,530 INFO L241 Difference]: Finished difference. Result has 138 places, 307 transitions, 4680 flow [2020-10-16 05:13:54,531 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=4680, PETRI_PLACES=138, PETRI_TRANSITIONS=307} [2020-10-16 05:13:54,531 INFO L342 CegarLoopForPetriNet]: 34 programPoint places, 104 predicate places. [2020-10-16 05:13:54,531 INFO L481 AbstractCegarLoop]: Abstraction has has 138 places, 307 transitions, 4680 flow [2020-10-16 05:13:54,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 05:13:54,531 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:13:54,531 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:13:54,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:13:54,734 INFO L429 AbstractCegarLoop]: === Iteration 6 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 05:13:54,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:13:54,735 INFO L82 PathProgramCache]: Analyzing trace with hash -869727287, now seen corresponding path program 3 times [2020-10-16 05:13:54,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:13:54,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428283492] [2020-10-16 05:13:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:13:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:13:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:13:54,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428283492] [2020-10-16 05:13:54,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891671739] [2020-10-16 05:13:54,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:13:54,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-16 05:13:54,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 05:13:54,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 05:13:54,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:13:54,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:13:54,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:13:54,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-16 05:13:54,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25585175] [2020-10-16 05:13:54,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 05:13:54,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:13:54,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 05:13:54,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-16 05:13:54,976 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 182 [2020-10-16 05:13:54,977 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 307 transitions, 4680 flow. Second operand 17 states. [2020-10-16 05:13:54,977 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:13:54,977 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 182 [2020-10-16 05:13:54,977 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:13:59,529 INFO L129 PetriNetUnfolder]: 16594/26637 cut-off events. [2020-10-16 05:13:59,529 INFO L130 PetriNetUnfolder]: For 314273/314300 co-relation queries the response was YES. [2020-10-16 05:13:59,809 INFO L80 FinitePrefix]: Finished finitePrefix Result has 187208 conditions, 26637 events. 16594/26637 cut-off events. For 314273/314300 co-relation queries the response was YES. Maximal size of possible extension queue 2007. Compared 217748 event pairs, 1978 based on Foata normal form. 52/26627 useless extension candidates. Maximal degree in co-relation 187151. Up to 7309 conditions per place. [2020-10-16 05:13:59,926 INFO L132 encePairwiseOnDemand]: 169/182 looper letters, 219 selfloop transitions, 271 changer transitions 9/504 dead transitions. [2020-10-16 05:13:59,926 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 504 transitions, 7739 flow [2020-10-16 05:13:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 05:13:59,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-16 05:13:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3480 transitions. [2020-10-16 05:13:59,929 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5975274725274725 [2020-10-16 05:13:59,929 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3480 transitions. [2020-10-16 05:13:59,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3480 transitions. [2020-10-16 05:13:59,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:13:59,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3480 transitions. [2020-10-16 05:13:59,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 33 states. [2020-10-16 05:13:59,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 33 states. [2020-10-16 05:13:59,939 INFO L81 ComplementDD]: Finished complementDD. Result 33 states. [2020-10-16 05:13:59,939 INFO L185 Difference]: Start difference. First operand has 138 places, 307 transitions, 4680 flow. Second operand 32 states and 3480 transitions. [2020-10-16 05:13:59,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 504 transitions, 7739 flow [2020-10-16 05:14:05,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 504 transitions, 7340 flow, removed 169 selfloop flow, removed 7 redundant places. [2020-10-16 05:14:05,957 INFO L241 Difference]: Finished difference. Result has 163 places, 336 transitions, 5406 flow [2020-10-16 05:14:05,957 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=4327, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5406, PETRI_PLACES=163, PETRI_TRANSITIONS=336} [2020-10-16 05:14:05,958 INFO L342 CegarLoopForPetriNet]: 34 programPoint places, 129 predicate places. [2020-10-16 05:14:05,958 INFO L481 AbstractCegarLoop]: Abstraction has has 163 places, 336 transitions, 5406 flow [2020-10-16 05:14:05,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 05:14:05,958 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:14:05,958 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:14:06,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-16 05:14:06,159 INFO L429 AbstractCegarLoop]: === Iteration 7 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 05:14:06,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:14:06,160 INFO L82 PathProgramCache]: Analyzing trace with hash 247634402, now seen corresponding path program 1 times [2020-10-16 05:14:06,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:14:06,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683425286] [2020-10-16 05:14:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:14:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:14:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-16 05:14:06,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683425286] [2020-10-16 05:14:06,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 05:14:06,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 05:14:06,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530718702] [2020-10-16 05:14:06,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 05:14:06,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:14:06,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 05:14:06,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 05:14:06,193 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 182 [2020-10-16 05:14:06,193 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 336 transitions, 5406 flow. Second operand 5 states. [2020-10-16 05:14:06,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:14:06,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 182 [2020-10-16 05:14:06,194 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:14:12,284 INFO L129 PetriNetUnfolder]: 18000/30229 cut-off events. [2020-10-16 05:14:12,284 INFO L130 PetriNetUnfolder]: For 452080/460897 co-relation queries the response was YES. [2020-10-16 05:14:12,610 INFO L80 FinitePrefix]: Finished finitePrefix Result has 232037 conditions, 30229 events. 18000/30229 cut-off events. For 452080/460897 co-relation queries the response was YES. Maximal size of possible extension queue 3831. Compared 291769 event pairs, 2363 based on Foata normal form. 809/30223 useless extension candidates. Maximal degree in co-relation 231976. Up to 11101 conditions per place. [2020-10-16 05:14:12,739 INFO L132 encePairwiseOnDemand]: 174/182 looper letters, 345 selfloop transitions, 296 changer transitions 25/681 dead transitions. [2020-10-16 05:14:12,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 681 transitions, 12156 flow [2020-10-16 05:14:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 05:14:12,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 05:14:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 859 transitions. [2020-10-16 05:14:12,740 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.67425431711146 [2020-10-16 05:14:12,740 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 859 transitions. [2020-10-16 05:14:12,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 859 transitions. [2020-10-16 05:14:12,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:14:12,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 859 transitions. [2020-10-16 05:14:12,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 05:14:12,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 05:14:12,742 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 05:14:12,743 INFO L185 Difference]: Start difference. First operand has 163 places, 336 transitions, 5406 flow. Second operand 7 states and 859 transitions. [2020-10-16 05:14:12,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 681 transitions, 12156 flow [2020-10-16 05:14:20,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 681 transitions, 11736 flow, removed 63 selfloop flow, removed 17 redundant places. [2020-10-16 05:14:20,736 INFO L241 Difference]: Finished difference. Result has 156 places, 528 transitions, 9711 flow [2020-10-16 05:14:20,736 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=5182, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9711, PETRI_PLACES=156, PETRI_TRANSITIONS=528} [2020-10-16 05:14:20,736 INFO L342 CegarLoopForPetriNet]: 34 programPoint places, 122 predicate places. [2020-10-16 05:14:20,736 INFO L481 AbstractCegarLoop]: Abstraction has has 156 places, 528 transitions, 9711 flow [2020-10-16 05:14:20,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 05:14:20,736 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:14:20,736 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:14:20,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-16 05:14:20,737 INFO L429 AbstractCegarLoop]: === Iteration 8 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 05:14:20,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:14:20,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1960634788, now seen corresponding path program 1 times [2020-10-16 05:14:20,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:14:20,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054293431] [2020-10-16 05:14:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:14:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:14:20,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:14:20,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054293431] [2020-10-16 05:14:20,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528154381] [2020-10-16 05:14:20,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:14:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:14:20,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 05:14:20,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:14:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:14:21,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:14:21,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-10-16 05:14:21,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866355770] [2020-10-16 05:14:21,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 05:14:21,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:14:21,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 05:14:21,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-16 05:14:21,043 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 182 [2020-10-16 05:14:21,044 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 528 transitions, 9711 flow. Second operand 19 states. [2020-10-16 05:14:21,044 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:14:21,044 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 182 [2020-10-16 05:14:21,044 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:14:51,058 INFO L129 PetriNetUnfolder]: 57611/97358 cut-off events. [2020-10-16 05:14:51,058 INFO L130 PetriNetUnfolder]: For 1593512/1593572 co-relation queries the response was YES. [2020-10-16 05:14:52,168 INFO L80 FinitePrefix]: Finished finitePrefix Result has 808845 conditions, 97358 events. 57611/97358 cut-off events. For 1593512/1593572 co-relation queries the response was YES. Maximal size of possible extension queue 8605. Compared 1006369 event pairs, 8410 based on Foata normal form. 190/97443 useless extension candidates. Maximal degree in co-relation 808781. Up to 31517 conditions per place. [2020-10-16 05:14:52,620 INFO L132 encePairwiseOnDemand]: 171/182 looper letters, 1675 selfloop transitions, 949 changer transitions 8/2637 dead transitions. [2020-10-16 05:14:52,621 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 2637 transitions, 54143 flow [2020-10-16 05:14:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-16 05:14:52,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-16 05:14:52,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3384 transitions. [2020-10-16 05:14:52,625 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5997873094647288 [2020-10-16 05:14:52,625 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3384 transitions. [2020-10-16 05:14:52,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3384 transitions. [2020-10-16 05:14:52,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:14:52,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3384 transitions. [2020-10-16 05:14:52,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 32 states. [2020-10-16 05:14:52,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 32 states. [2020-10-16 05:14:52,635 INFO L81 ComplementDD]: Finished complementDD. Result 32 states. [2020-10-16 05:14:52,635 INFO L185 Difference]: Start difference. First operand has 156 places, 528 transitions, 9711 flow. Second operand 31 states and 3384 transitions. [2020-10-16 05:14:52,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 2637 transitions, 54143 flow [2020-10-16 05:17:51,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 2637 transitions, 53949 flow, removed 97 selfloop flow, removed 0 redundant places. [2020-10-16 05:17:51,524 INFO L241 Difference]: Finished difference. Result has 208 places, 1463 transitions, 32696 flow [2020-10-16 05:17:51,525 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=182, PETRI_DIFFERENCE_MINUEND_FLOW=9675, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=32696, PETRI_PLACES=208, PETRI_TRANSITIONS=1463} [2020-10-16 05:17:51,525 INFO L342 CegarLoopForPetriNet]: 34 programPoint places, 174 predicate places. [2020-10-16 05:17:51,525 INFO L481 AbstractCegarLoop]: Abstraction has has 208 places, 1463 transitions, 32696 flow [2020-10-16 05:17:51,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 05:17:51,525 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 05:17:51,525 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 05:17:51,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:17:51,726 INFO L429 AbstractCegarLoop]: === Iteration 9 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-16 05:17:51,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 05:17:51,727 INFO L82 PathProgramCache]: Analyzing trace with hash 549469564, now seen corresponding path program 2 times [2020-10-16 05:17:51,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 05:17:51,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619442310] [2020-10-16 05:17:51,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 05:17:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 05:17:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 05:17:51,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619442310] [2020-10-16 05:17:51,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570195504] [2020-10-16 05:17:51,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 05:17:51,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 05:17:51,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 05:17:51,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-16 05:17:51,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 05:17:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 05:17:51,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 05:17:51,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2020-10-16 05:17:51,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708163094] [2020-10-16 05:17:51,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-16 05:17:51,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 05:17:51,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-16 05:17:51,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-16 05:17:51,998 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 182 [2020-10-16 05:17:51,999 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 1463 transitions, 32696 flow. Second operand 18 states. [2020-10-16 05:17:52,000 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 05:17:52,000 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 182 [2020-10-16 05:17:52,000 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 05:18:54,767 INFO L129 PetriNetUnfolder]: 72237/124349 cut-off events. [2020-10-16 05:18:54,768 INFO L130 PetriNetUnfolder]: For 3584025/3584254 co-relation queries the response was YES. [2020-10-16 05:18:56,742 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1233592 conditions, 124349 events. 72237/124349 cut-off events. For 3584025/3584254 co-relation queries the response was YES. Maximal size of possible extension queue 11159. Compared 1357476 event pairs, 7264 based on Foata normal form. 1011/125271 useless extension candidates. Maximal degree in co-relation 1233504. Up to 42377 conditions per place. [2020-10-16 05:18:57,385 INFO L132 encePairwiseOnDemand]: 170/182 looper letters, 605 selfloop transitions, 2272 changer transitions 164/3046 dead transitions. [2020-10-16 05:18:57,386 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 3046 transitions, 72926 flow [2020-10-16 05:18:57,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-16 05:18:57,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-16 05:18:57,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3684 transitions. [2020-10-16 05:18:57,390 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.5953458306399483 [2020-10-16 05:18:57,390 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3684 transitions. [2020-10-16 05:18:57,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3684 transitions. [2020-10-16 05:18:57,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 05:18:57,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3684 transitions. [2020-10-16 05:18:57,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 35 states. [2020-10-16 05:18:57,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 35 states. [2020-10-16 05:18:57,399 INFO L81 ComplementDD]: Finished complementDD. Result 35 states. [2020-10-16 05:18:57,399 INFO L185 Difference]: Start difference. First operand has 208 places, 1463 transitions, 32696 flow. Second operand 34 states and 3684 transitions. [2020-10-16 05:18:57,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 3046 transitions, 72926 flow Received shutdown request... [2020-10-16 05:26:26,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 05:26:26,100 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-16 05:26:26,104 WARN L235 ceAbstractionStarter]: Timeout [2020-10-16 05:26:26,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 05:26:26 BasicIcfg [2020-10-16 05:26:26,104 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 05:26:26,105 INFO L168 Benchmark]: Toolchain (without parser) took 820195.86 ms. Allocated memory was 251.7 MB in the beginning and 6.9 GB in the end (delta: 6.7 GB). Free memory was 207.6 MB in the beginning and 4.2 GB in the end (delta: -4.0 GB). Peak memory consumption was 6.8 GB. Max. memory is 14.2 GB. [2020-10-16 05:26:26,106 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 05:26:26,106 INFO L168 Benchmark]: CACSL2BoogieTranslator took 721.63 ms. Allocated memory was 251.7 MB in the beginning and 313.0 MB in the end (delta: 61.3 MB). Free memory was 207.6 MB in the beginning and 268.4 MB in the end (delta: -60.7 MB). Peak memory consumption was 33.0 MB. Max. memory is 14.2 GB. [2020-10-16 05:26:26,107 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.01 ms. Allocated memory is still 313.0 MB. Free memory was 268.4 MB in the beginning and 265.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 05:26:26,107 INFO L168 Benchmark]: Boogie Preprocessor took 28.64 ms. Allocated memory is still 313.0 MB. Free memory is still 265.9 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 05:26:26,107 INFO L168 Benchmark]: RCFGBuilder took 366.27 ms. Allocated memory is still 313.0 MB. Free memory was 265.9 MB in the beginning and 244.0 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 14.2 GB. [2020-10-16 05:26:26,108 INFO L168 Benchmark]: TraceAbstraction took 819021.03 ms. Allocated memory was 313.0 MB in the beginning and 6.9 GB in the end (delta: 6.6 GB). Free memory was 244.0 MB in the beginning and 4.2 GB in the end (delta: -3.9 GB). Peak memory consumption was 6.8 GB. Max. memory is 14.2 GB. [2020-10-16 05:26:26,110 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 251.7 MB. Free memory is still 228.0 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 721.63 ms. Allocated memory was 251.7 MB in the beginning and 313.0 MB in the end (delta: 61.3 MB). Free memory was 207.6 MB in the beginning and 268.4 MB in the end (delta: -60.7 MB). Peak memory consumption was 33.0 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 53.01 ms. Allocated memory is still 313.0 MB. Free memory was 268.4 MB in the beginning and 265.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 28.64 ms. Allocated memory is still 313.0 MB. Free memory is still 265.9 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 366.27 ms. Allocated memory is still 313.0 MB. Free memory was 265.9 MB in the beginning and 244.0 MB in the end (delta: 21.9 MB). Peak memory consumption was 21.9 MB. Max. memory is 14.2 GB. * TraceAbstraction took 819021.03 ms. Allocated memory was 313.0 MB in the beginning and 6.9 GB in the end (delta: 6.6 GB). Free memory was 244.0 MB in the beginning and 4.2 GB in the end (delta: -3.9 GB). Peak memory consumption was 6.8 GB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 475 VarBasedMoverChecksPositive, 3 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 3 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 3 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.7s, 63 PlacesBefore, 17 PlacesAfterwards, 60 TransitionsBefore, 11 TransitionsAfterwards, 692 CoEnabledTransitionPairs, 6 FixpointIterations, 26 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 61 TotalNumberOfCompositions, 623 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 743 VarBasedMoverChecksPositive, 11 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 11 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 26 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.3s, 72 PlacesBefore, 24 PlacesAfterwards, 67 TransitionsBefore, 16 TransitionsAfterwards, 1108 CoEnabledTransitionPairs, 6 FixpointIterations, 25 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1464 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1022 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 48 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 81 PlacesBefore, 29 PlacesAfterwards, 74 TransitionsBefore, 19 TransitionsAfterwards, 1608 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 2245 MoverChecksTotal - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 1407 VarBasedMoverChecksPositive, 25 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 25 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 79 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.4s, 90 PlacesBefore, 34 PlacesAfterwards, 81 TransitionsBefore, 22 TransitionsAfterwards, 2192 CoEnabledTransitionPairs, 6 FixpointIterations, 24 TrivialSequentialCompositions, 36 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 3 ConcurrentYvCompositions, 3 ChoiceCompositions, 67 TotalNumberOfCompositions, 3265 MoverChecksTotal - TimeoutResultAtElement [Line: 679]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 679). Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 58 locations, 1 error locations. Started 4 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 818.7s, OverallIterations: 26, TraceHistogramMax: 4, AutomataDifference: 806.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.9s, HoareTripleCheckerStatistics: 212 SDtfs, 2683 SDslu, 627 SDs, 0 SdLazy, 6300 SolverSat, 570 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 531 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 469 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4831 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32696occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 445 NumberOfCodeBlocks, 445 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 374 ConstructedInterpolants, 0 QuantifiedInterpolants, 28748 SizeOfPredicates, 50 NumberOfNonLiveVariables, 1022 ConjunctsInSsa, 91 ConjunctsInUnsatCore, 33 InterpolantComputations, 13 PerfectInterpolantSequences, 31/86 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 could not prove your program: Timeout Completed graceful shutdown