/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -i ../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-7bb8cbd [2020-10-16 02:38:13,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 02:38:13,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 02:38:13,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 02:38:13,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 02:38:13,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 02:38:13,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 02:38:13,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 02:38:13,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 02:38:13,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 02:38:13,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 02:38:13,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 02:38:13,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 02:38:13,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 02:38:13,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 02:38:13,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 02:38:13,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 02:38:13,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 02:38:13,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 02:38:13,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 02:38:13,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 02:38:13,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 02:38:13,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 02:38:13,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 02:38:13,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 02:38:13,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 02:38:13,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 02:38:13,264 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 02:38:13,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 02:38:13,268 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 02:38:13,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 02:38:13,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 02:38:13,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 02:38:13,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 02:38:13,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 02:38:13,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 02:38:13,274 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2020-10-16 02:38:13,309 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 02:38:13,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 02:38:13,311 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 02:38:13,311 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 02:38:13,311 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 02:38:13,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 02:38:13,311 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 02:38:13,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 02:38:13,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 02:38:13,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 02:38:13,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 02:38:13,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 02:38:13,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 02:38:13,313 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 02:38:13,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 02:38:13,313 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 02:38:13,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 02:38:13,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 02:38:13,314 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 02:38:13,314 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 02:38:13,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 02:38:13,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 02:38:13,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 02:38:13,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 02:38:13,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 02:38:13,315 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 02:38:13,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 02:38:13,315 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-16 02:38:13,316 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 02:38:13,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 02:38:13,667 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 02:38:13,671 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 02:38:13,673 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 02:38:13,673 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 02:38:13,674 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-16 02:38:13,734 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08bc931d4/bda4c55701494c20a68537e668a572dd/FLAG07ddda679 [2020-10-16 02:38:14,179 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 02:38:14,180 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-16 02:38:14,180 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 02:38:14,180 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 02:38:14,181 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 02:38:14,229 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08bc931d4/bda4c55701494c20a68537e668a572dd/FLAG07ddda679 [2020-10-16 02:38:14,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08bc931d4/bda4c55701494c20a68537e668a572dd [2020-10-16 02:38:14,574 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 02:38:14,577 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 02:38:14,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 02:38:14,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 02:38:14,582 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 02:38:14,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:38:14" (1/1) ... [2020-10-16 02:38:14,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@427fa18c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:38:14, skipping insertion in model container [2020-10-16 02:38:14,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:38:14" (1/1) ... [2020-10-16 02:38:14,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 02:38:14,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 02:38:14,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 02:38:14,806 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 02:38:14,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 02:38:14,911 INFO L208 MainTranslator]: Completed translation [2020-10-16 02:38:14,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:38:14 WrapperNode [2020-10-16 02:38:14,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 02:38:14,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 02:38:14,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 02:38:14,912 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 02:38:14,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:38:14" (1/1) ... [2020-10-16 02:38:14,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:38:14" (1/1) ... [2020-10-16 02:38:14,949 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 02:38:14,950 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 02:38:14,950 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 02:38:14,950 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 02:38:14,959 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:38:14" (1/1) ... [2020-10-16 02:38:14,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:38:14" (1/1) ... [2020-10-16 02:38:14,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:38:14" (1/1) ... [2020-10-16 02:38:14,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:38:14" (1/1) ... [2020-10-16 02:38:14,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:38:14" (1/1) ... [2020-10-16 02:38:14,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:38:14" (1/1) ... [2020-10-16 02:38:14,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:38:14" (1/1) ... [2020-10-16 02:38:14,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 02:38:14,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 02:38:14,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 02:38:14,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 02:38:14,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:38:14" (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 02:38:15,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 02:38:15,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 02:38:15,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 02:38:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 02:38:15,033 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2020-10-16 02:38:15,033 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2020-10-16 02:38:15,034 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2020-10-16 02:38:15,035 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2020-10-16 02:38:15,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 02:38:15,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 02:38:15,037 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 02:38:15,309 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 02:38:15,309 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 02:38:15,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:38:15 BoogieIcfgContainer [2020-10-16 02:38:15,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 02:38:15,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 02:38:15,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 02:38:15,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 02:38:15,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:38:14" (1/3) ... [2020-10-16 02:38:15,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392aec99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:38:15, skipping insertion in model container [2020-10-16 02:38:15,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:38:14" (2/3) ... [2020-10-16 02:38:15,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392aec99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:38:15, skipping insertion in model container [2020-10-16 02:38:15,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:38:15" (3/3) ... [2020-10-16 02:38:15,322 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2020-10-16 02:38:15,336 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 02:38:15,343 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 02:38:15,344 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 02:38:15,387 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,387 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,388 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,388 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,388 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,389 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,389 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,389 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,389 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,390 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,390 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,390 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,391 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,391 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,391 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,391 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,392 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,392 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,392 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,392 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,393 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,393 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,396 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,397 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,397 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,397 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,397 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,404 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,404 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,405 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,405 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,405 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 02:38:15,437 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 02:38:15,454 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 02:38:15,454 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-16 02:38:15,454 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 02:38:15,454 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 02:38:15,454 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 02:38:15,455 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 02:38:15,455 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 02:38:15,455 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 02:38:15,470 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-10-16 02:38:15,517 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-10-16 02:38:15,517 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-16 02:38:15,522 INFO L80 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 56 events. 5/56 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2020-10-16 02:38:15,523 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 56 transitions, 134 flow [2020-10-16 02:38:15,528 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 46 transitions, 110 flow [2020-10-16 02:38:15,531 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 02:38:15,533 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 47 places, 46 transitions, 110 flow [2020-10-16 02:38:15,536 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 47 places, 46 transitions, 110 flow [2020-10-16 02:38:15,536 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 47 places, 46 transitions, 110 flow [2020-10-16 02:38:15,555 INFO L129 PetriNetUnfolder]: 5/48 cut-off events. [2020-10-16 02:38:15,555 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-16 02:38:15,556 INFO L80 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 48 events. 5/48 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2020-10-16 02:38:15,558 INFO L117 LiptonReduction]: Number of co-enabled transitions 528 [2020-10-16 02:38:16,284 INFO L132 LiptonReduction]: Checked pairs total: 972 [2020-10-16 02:38:16,285 INFO L134 LiptonReduction]: Total number of compositions: 27 [2020-10-16 02:38:16,288 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 759 [2020-10-16 02:38:16,299 INFO L129 PetriNetUnfolder]: 3/22 cut-off events. [2020-10-16 02:38:16,300 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-16 02:38:16,300 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:16,301 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:16,301 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:16,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1023027095, now seen corresponding path program 1 times [2020-10-16 02:38:16,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:16,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410914045] [2020-10-16 02:38:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:16,497 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 02:38:16,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410914045] [2020-10-16 02:38:16,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:38:16,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:38:16,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613383931] [2020-10-16 02:38:16,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:38:16,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:16,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:38:16,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:38:16,527 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 83 [2020-10-16 02:38:16,529 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 60 flow. Second operand 3 states. [2020-10-16 02:38:16,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:16,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 83 [2020-10-16 02:38:16,531 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:16,567 INFO L129 PetriNetUnfolder]: 3/25 cut-off events. [2020-10-16 02:38:16,567 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2020-10-16 02:38:16,568 INFO L80 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 25 events. 3/25 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 26. Up to 6 conditions per place. [2020-10-16 02:38:16,569 INFO L132 encePairwiseOnDemand]: 80/83 looper letters, 5 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2020-10-16 02:38:16,570 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 23 transitions, 78 flow [2020-10-16 02:38:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:38:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:38:16,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2020-10-16 02:38:16,586 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8273092369477911 [2020-10-16 02:38:16,587 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2020-10-16 02:38:16,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2020-10-16 02:38:16,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:16,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2020-10-16 02:38:16,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:38:16,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:38:16,602 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:38:16,605 INFO L185 Difference]: Start difference. First operand has 24 places, 21 transitions, 60 flow. Second operand 3 states and 206 transitions. [2020-10-16 02:38:16,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 23 transitions, 78 flow [2020-10-16 02:38:16,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 23 transitions, 66 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-16 02:38:16,611 INFO L241 Difference]: Finished difference. Result has 23 places, 22 transitions, 60 flow [2020-10-16 02:38:16,614 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=60, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2020-10-16 02:38:16,615 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2020-10-16 02:38:16,616 INFO L481 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 60 flow [2020-10-16 02:38:16,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:38:16,616 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:16,616 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:16,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 02:38:16,617 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:16,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:16,617 INFO L82 PathProgramCache]: Analyzing trace with hash -362482988, now seen corresponding path program 1 times [2020-10-16 02:38:16,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:16,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136850423] [2020-10-16 02:38:16,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:38:16,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136850423] [2020-10-16 02:38:16,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:38:16,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 02:38:16,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577043416] [2020-10-16 02:38:16,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 02:38:16,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:16,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 02:38:16,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 02:38:16,657 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 83 [2020-10-16 02:38:16,658 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 60 flow. Second operand 3 states. [2020-10-16 02:38:16,658 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:16,658 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 83 [2020-10-16 02:38:16,658 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:16,676 INFO L129 PetriNetUnfolder]: 3/27 cut-off events. [2020-10-16 02:38:16,677 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 02:38:16,677 INFO L80 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 27 events. 3/27 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 28 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 28. Up to 6 conditions per place. [2020-10-16 02:38:16,678 INFO L132 encePairwiseOnDemand]: 80/83 looper letters, 5 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2020-10-16 02:38:16,678 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 24 transitions, 78 flow [2020-10-16 02:38:16,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 02:38:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-16 02:38:16,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2020-10-16 02:38:16,681 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8273092369477911 [2020-10-16 02:38:16,681 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2020-10-16 02:38:16,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2020-10-16 02:38:16,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:16,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2020-10-16 02:38:16,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 4 states. [2020-10-16 02:38:16,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 4 states. [2020-10-16 02:38:16,685 INFO L81 ComplementDD]: Finished complementDD. Result 4 states. [2020-10-16 02:38:16,685 INFO L185 Difference]: Start difference. First operand has 23 places, 22 transitions, 60 flow. Second operand 3 states and 206 transitions. [2020-10-16 02:38:16,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 24 transitions, 78 flow [2020-10-16 02:38:16,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 24 transitions, 76 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:38:16,687 INFO L241 Difference]: Finished difference. Result has 25 places, 23 transitions, 70 flow [2020-10-16 02:38:16,688 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2020-10-16 02:38:16,688 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 1 predicate places. [2020-10-16 02:38:16,689 INFO L481 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 70 flow [2020-10-16 02:38:16,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 02:38:16,689 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:16,689 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:16,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-16 02:38:16,690 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:16,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:16,690 INFO L82 PathProgramCache]: Analyzing trace with hash -530455511, now seen corresponding path program 1 times [2020-10-16 02:38:16,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:16,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030194953] [2020-10-16 02:38:16,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:38:16,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030194953] [2020-10-16 02:38:16,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220703018] [2020-10-16 02:38:16,764 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 02:38:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:16,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-16 02:38:16,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:38:16,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:16,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-16 02:38:16,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730564879] [2020-10-16 02:38:16,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 02:38:16,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:16,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 02:38:16,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-16 02:38:16,857 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 83 [2020-10-16 02:38:16,857 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 70 flow. Second operand 5 states. [2020-10-16 02:38:16,857 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:16,857 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 83 [2020-10-16 02:38:16,857 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:16,885 INFO L129 PetriNetUnfolder]: 3/29 cut-off events. [2020-10-16 02:38:16,885 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-16 02:38:16,886 INFO L80 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 29 events. 3/29 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 1/30 useless extension candidates. Maximal degree in co-relation 37. Up to 6 conditions per place. [2020-10-16 02:38:16,886 INFO L132 encePairwiseOnDemand]: 80/83 looper letters, 6 selfloop transitions, 3 changer transitions 0/26 dead transitions. [2020-10-16 02:38:16,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 26 transitions, 96 flow [2020-10-16 02:38:16,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-16 02:38:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-16 02:38:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 274 transitions. [2020-10-16 02:38:16,889 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8253012048192772 [2020-10-16 02:38:16,889 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 274 transitions. [2020-10-16 02:38:16,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 274 transitions. [2020-10-16 02:38:16,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:16,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 274 transitions. [2020-10-16 02:38:16,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 5 states. [2020-10-16 02:38:16,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 5 states. [2020-10-16 02:38:16,892 INFO L81 ComplementDD]: Finished complementDD. Result 5 states. [2020-10-16 02:38:16,893 INFO L185 Difference]: Start difference. First operand has 25 places, 23 transitions, 70 flow. Second operand 4 states and 274 transitions. [2020-10-16 02:38:16,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 26 transitions, 96 flow [2020-10-16 02:38:16,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 26 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-16 02:38:16,895 INFO L241 Difference]: Finished difference. Result has 28 places, 24 transitions, 84 flow [2020-10-16 02:38:16,895 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2020-10-16 02:38:16,895 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 4 predicate places. [2020-10-16 02:38:16,895 INFO L481 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 84 flow [2020-10-16 02:38:16,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 02:38:16,896 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:16,896 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:17,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-16 02:38:17,105 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:17,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1548090432, now seen corresponding path program 1 times [2020-10-16 02:38:17,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:17,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652149525] [2020-10-16 02:38:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 02:38:17,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652149525] [2020-10-16 02:38:17,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919871028] [2020-10-16 02:38:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 02:38:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:17,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:38:17,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:17,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 02:38:17,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:17,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-10-16 02:38:17,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399890914] [2020-10-16 02:38:17,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 02:38:17,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:17,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 02:38:17,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-16 02:38:17,249 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 83 [2020-10-16 02:38:17,249 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 84 flow. Second operand 7 states. [2020-10-16 02:38:17,249 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:17,249 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 83 [2020-10-16 02:38:17,250 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:17,434 INFO L129 PetriNetUnfolder]: 92/214 cut-off events. [2020-10-16 02:38:17,434 INFO L130 PetriNetUnfolder]: For 181/181 co-relation queries the response was YES. [2020-10-16 02:38:17,436 INFO L80 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 214 events. 92/214 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 731 event pairs, 10 based on Foata normal form. 19/233 useless extension candidates. Maximal degree in co-relation 384. Up to 46 conditions per place. [2020-10-16 02:38:17,438 INFO L132 encePairwiseOnDemand]: 77/83 looper letters, 43 selfloop transitions, 24 changer transitions 0/78 dead transitions. [2020-10-16 02:38:17,438 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 78 transitions, 417 flow [2020-10-16 02:38:17,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 02:38:17,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 02:38:17,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 763 transitions. [2020-10-16 02:38:17,443 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7071362372567191 [2020-10-16 02:38:17,443 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 763 transitions. [2020-10-16 02:38:17,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 763 transitions. [2020-10-16 02:38:17,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:17,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 763 transitions. [2020-10-16 02:38:17,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 02:38:17,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 02:38:17,450 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 02:38:17,450 INFO L185 Difference]: Start difference. First operand has 28 places, 24 transitions, 84 flow. Second operand 13 states and 763 transitions. [2020-10-16 02:38:17,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 78 transitions, 417 flow [2020-10-16 02:38:17,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 78 transitions, 399 flow, removed 3 selfloop flow, removed 2 redundant places. [2020-10-16 02:38:17,455 INFO L241 Difference]: Finished difference. Result has 44 places, 43 transitions, 264 flow [2020-10-16 02:38:17,455 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=264, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2020-10-16 02:38:17,456 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 20 predicate places. [2020-10-16 02:38:17,456 INFO L481 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 264 flow [2020-10-16 02:38:17,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 02:38:17,456 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:17,456 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:17,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:38:17,670 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:17,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:17,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1097078868, now seen corresponding path program 2 times [2020-10-16 02:38:17,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:17,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002080821] [2020-10-16 02:38:17,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-16 02:38:17,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002080821] [2020-10-16 02:38:17,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 02:38:17,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-16 02:38:17,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497888284] [2020-10-16 02:38:17,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-16 02:38:17,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:17,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-16 02:38:17,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-16 02:38:17,738 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 83 [2020-10-16 02:38:17,738 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 264 flow. Second operand 5 states. [2020-10-16 02:38:17,738 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:17,738 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 83 [2020-10-16 02:38:17,738 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:17,788 INFO L129 PetriNetUnfolder]: 21/93 cut-off events. [2020-10-16 02:38:17,789 INFO L130 PetriNetUnfolder]: For 180/184 co-relation queries the response was YES. [2020-10-16 02:38:17,790 INFO L80 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 93 events. 21/93 cut-off events. For 180/184 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 275 event pairs, 1 based on Foata normal form. 2/93 useless extension candidates. Maximal degree in co-relation 237. Up to 21 conditions per place. [2020-10-16 02:38:17,791 INFO L132 encePairwiseOnDemand]: 78/83 looper letters, 4 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2020-10-16 02:38:17,791 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 277 flow [2020-10-16 02:38:17,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:38:17,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:38:17,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 299 transitions. [2020-10-16 02:38:17,793 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.7204819277108434 [2020-10-16 02:38:17,793 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 299 transitions. [2020-10-16 02:38:17,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 299 transitions. [2020-10-16 02:38:17,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:17,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 299 transitions. [2020-10-16 02:38:17,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:38:17,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:38:17,796 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:38:17,796 INFO L185 Difference]: Start difference. First operand has 44 places, 43 transitions, 264 flow. Second operand 5 states and 299 transitions. [2020-10-16 02:38:17,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 277 flow [2020-10-16 02:38:17,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 42 transitions, 237 flow, removed 10 selfloop flow, removed 3 redundant places. [2020-10-16 02:38:17,802 INFO L241 Difference]: Finished difference. Result has 45 places, 42 transitions, 229 flow [2020-10-16 02:38:17,803 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2020-10-16 02:38:17,803 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 21 predicate places. [2020-10-16 02:38:17,803 INFO L481 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 229 flow [2020-10-16 02:38:17,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-16 02:38:17,803 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:17,804 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:17,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-16 02:38:17,804 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2078769682, now seen corresponding path program 2 times [2020-10-16 02:38:17,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:17,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994157412] [2020-10-16 02:38:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 02:38:17,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994157412] [2020-10-16 02:38:17,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553324369] [2020-10-16 02:38:17,859 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 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 02:38:17,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 02:38:17,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:38:17,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 02:38:17,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:17,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 02:38:17,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:17,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 02:38:17,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562841850] [2020-10-16 02:38:17,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 02:38:17,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:17,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 02:38:17,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 02:38:17,929 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 83 [2020-10-16 02:38:17,929 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 229 flow. Second operand 6 states. [2020-10-16 02:38:17,930 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:17,930 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 83 [2020-10-16 02:38:17,930 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:17,968 INFO L129 PetriNetUnfolder]: 26/108 cut-off events. [2020-10-16 02:38:17,969 INFO L130 PetriNetUnfolder]: For 342/360 co-relation queries the response was YES. [2020-10-16 02:38:17,970 INFO L80 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 108 events. 26/108 cut-off events. For 342/360 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 341 event pairs, 3 based on Foata normal form. 7/111 useless extension candidates. Maximal degree in co-relation 317. Up to 28 conditions per place. [2020-10-16 02:38:17,971 INFO L132 encePairwiseOnDemand]: 80/83 looper letters, 7 selfloop transitions, 13 changer transitions 0/46 dead transitions. [2020-10-16 02:38:17,972 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 46 transitions, 287 flow [2020-10-16 02:38:17,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 02:38:17,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-16 02:38:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 342 transitions. [2020-10-16 02:38:17,974 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8240963855421687 [2020-10-16 02:38:17,974 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 342 transitions. [2020-10-16 02:38:17,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 342 transitions. [2020-10-16 02:38:17,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:17,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 342 transitions. [2020-10-16 02:38:17,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 6 states. [2020-10-16 02:38:17,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 6 states. [2020-10-16 02:38:17,977 INFO L81 ComplementDD]: Finished complementDD. Result 6 states. [2020-10-16 02:38:17,977 INFO L185 Difference]: Start difference. First operand has 45 places, 42 transitions, 229 flow. Second operand 5 states and 342 transitions. [2020-10-16 02:38:17,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 46 transitions, 287 flow [2020-10-16 02:38:17,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 46 transitions, 279 flow, removed 0 selfloop flow, removed 4 redundant places. [2020-10-16 02:38:17,982 INFO L241 Difference]: Finished difference. Result has 46 places, 43 transitions, 268 flow [2020-10-16 02:38:17,982 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=268, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2020-10-16 02:38:17,983 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2020-10-16 02:38:17,983 INFO L481 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 268 flow [2020-10-16 02:38:17,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 02:38:17,983 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:17,983 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:18,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:38:18,198 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:18,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:18,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1464922605, now seen corresponding path program 3 times [2020-10-16 02:38:18,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:18,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002010758] [2020-10-16 02:38:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 02:38:18,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002010758] [2020-10-16 02:38:18,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511159101] [2020-10-16 02:38:18,323 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 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 02:38:18,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-16 02:38:18,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:38:18,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:38:18,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:18,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 02:38:18,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:18,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 02:38:18,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878855264] [2020-10-16 02:38:18,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 02:38:18,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:18,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 02:38:18,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-16 02:38:18,404 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 83 [2020-10-16 02:38:18,404 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 268 flow. Second operand 7 states. [2020-10-16 02:38:18,405 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:18,405 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 83 [2020-10-16 02:38:18,405 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:18,465 INFO L129 PetriNetUnfolder]: 30/120 cut-off events. [2020-10-16 02:38:18,465 INFO L130 PetriNetUnfolder]: For 543/571 co-relation queries the response was YES. [2020-10-16 02:38:18,466 INFO L80 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 120 events. 30/120 cut-off events. For 543/571 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 407 event pairs, 5 based on Foata normal form. 10/124 useless extension candidates. Maximal degree in co-relation 392. Up to 36 conditions per place. [2020-10-16 02:38:18,468 INFO L132 encePairwiseOnDemand]: 80/83 looper letters, 8 selfloop transitions, 14 changer transitions 0/48 dead transitions. [2020-10-16 02:38:18,468 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 48 transitions, 334 flow [2020-10-16 02:38:18,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 02:38:18,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 02:38:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 410 transitions. [2020-10-16 02:38:18,470 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8232931726907631 [2020-10-16 02:38:18,471 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 410 transitions. [2020-10-16 02:38:18,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 410 transitions. [2020-10-16 02:38:18,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:18,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 410 transitions. [2020-10-16 02:38:18,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 02:38:18,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 02:38:18,474 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 02:38:18,474 INFO L185 Difference]: Start difference. First operand has 46 places, 43 transitions, 268 flow. Second operand 6 states and 410 transitions. [2020-10-16 02:38:18,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 48 transitions, 334 flow [2020-10-16 02:38:18,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 305 flow, removed 4 selfloop flow, removed 3 redundant places. [2020-10-16 02:38:18,479 INFO L241 Difference]: Finished difference. Result has 49 places, 44 transitions, 287 flow [2020-10-16 02:38:18,479 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2020-10-16 02:38:18,479 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 25 predicate places. [2020-10-16 02:38:18,480 INFO L481 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 287 flow [2020-10-16 02:38:18,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 02:38:18,480 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:18,480 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:18,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:38:18,695 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:18,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:18,695 INFO L82 PathProgramCache]: Analyzing trace with hash -671663464, now seen corresponding path program 4 times [2020-10-16 02:38:18,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:18,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356748940] [2020-10-16 02:38:18,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 02:38:18,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356748940] [2020-10-16 02:38:18,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024616742] [2020-10-16 02:38:18,768 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 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 02:38:18,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 02:38:18,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:38:18,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 02:38:18,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 02:38:18,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:18,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 02:38:18,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074731051] [2020-10-16 02:38:18,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 02:38:18,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:18,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 02:38:18,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-16 02:38:18,836 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 83 [2020-10-16 02:38:18,837 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 287 flow. Second operand 7 states. [2020-10-16 02:38:18,837 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:18,837 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 83 [2020-10-16 02:38:18,837 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:18,879 INFO L129 PetriNetUnfolder]: 28/128 cut-off events. [2020-10-16 02:38:18,880 INFO L130 PetriNetUnfolder]: For 702/781 co-relation queries the response was YES. [2020-10-16 02:38:18,881 INFO L80 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 128 events. 28/128 cut-off events. For 702/781 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 420 event pairs, 6 based on Foata normal form. 23/148 useless extension candidates. Maximal degree in co-relation 409. Up to 37 conditions per place. [2020-10-16 02:38:18,882 INFO L132 encePairwiseOnDemand]: 80/83 looper letters, 8 selfloop transitions, 13 changer transitions 0/49 dead transitions. [2020-10-16 02:38:18,882 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 349 flow [2020-10-16 02:38:18,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 02:38:18,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-16 02:38:18,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 410 transitions. [2020-10-16 02:38:18,885 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8232931726907631 [2020-10-16 02:38:18,885 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 410 transitions. [2020-10-16 02:38:18,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 410 transitions. [2020-10-16 02:38:18,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:18,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 410 transitions. [2020-10-16 02:38:18,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 7 states. [2020-10-16 02:38:18,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 7 states. [2020-10-16 02:38:18,888 INFO L81 ComplementDD]: Finished complementDD. Result 7 states. [2020-10-16 02:38:18,888 INFO L185 Difference]: Start difference. First operand has 49 places, 44 transitions, 287 flow. Second operand 6 states and 410 transitions. [2020-10-16 02:38:18,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 349 flow [2020-10-16 02:38:18,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 313 flow, removed 5 selfloop flow, removed 4 redundant places. [2020-10-16 02:38:18,892 INFO L241 Difference]: Finished difference. Result has 51 places, 45 transitions, 297 flow [2020-10-16 02:38:18,893 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2020-10-16 02:38:18,893 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 27 predicate places. [2020-10-16 02:38:18,893 INFO L481 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 297 flow [2020-10-16 02:38:18,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 02:38:18,893 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:18,894 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:19,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:38:19,108 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:19,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1201568273, now seen corresponding path program 5 times [2020-10-16 02:38:19,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:19,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945162842] [2020-10-16 02:38:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 02:38:19,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945162842] [2020-10-16 02:38:19,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933081977] [2020-10-16 02:38:19,165 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 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 02:38:19,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-16 02:38:19,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:38:19,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:38:19,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-16 02:38:19,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:19,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 02:38:19,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430483567] [2020-10-16 02:38:19,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:38:19,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:19,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:38:19,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:38:19,254 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 83 [2020-10-16 02:38:19,254 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 297 flow. Second operand 8 states. [2020-10-16 02:38:19,254 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:19,255 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 83 [2020-10-16 02:38:19,255 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:19,298 INFO L129 PetriNetUnfolder]: 29/140 cut-off events. [2020-10-16 02:38:19,298 INFO L130 PetriNetUnfolder]: For 923/1005 co-relation queries the response was YES. [2020-10-16 02:38:19,300 INFO L80 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 140 events. 29/140 cut-off events. For 923/1005 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 472 event pairs, 9 based on Foata normal form. 28/165 useless extension candidates. Maximal degree in co-relation 441. Up to 41 conditions per place. [2020-10-16 02:38:19,301 INFO L132 encePairwiseOnDemand]: 79/83 looper letters, 7 selfloop transitions, 15 changer transitions 0/50 dead transitions. [2020-10-16 02:38:19,301 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 50 transitions, 351 flow [2020-10-16 02:38:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 02:38:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 02:38:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 477 transitions. [2020-10-16 02:38:19,303 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8209982788296041 [2020-10-16 02:38:19,304 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 477 transitions. [2020-10-16 02:38:19,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 477 transitions. [2020-10-16 02:38:19,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:19,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 477 transitions. [2020-10-16 02:38:19,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 02:38:19,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 02:38:19,307 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 02:38:19,307 INFO L185 Difference]: Start difference. First operand has 51 places, 45 transitions, 297 flow. Second operand 7 states and 477 transitions. [2020-10-16 02:38:19,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 50 transitions, 351 flow [2020-10-16 02:38:19,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 321 flow, removed 4 selfloop flow, removed 4 redundant places. [2020-10-16 02:38:19,311 INFO L241 Difference]: Finished difference. Result has 55 places, 46 transitions, 311 flow [2020-10-16 02:38:19,312 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=311, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2020-10-16 02:38:19,312 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 31 predicate places. [2020-10-16 02:38:19,312 INFO L481 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 311 flow [2020-10-16 02:38:19,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:38:19,312 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:19,312 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:19,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:38:19,528 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:19,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:19,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1465558958, now seen corresponding path program 6 times [2020-10-16 02:38:19,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:19,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551403163] [2020-10-16 02:38:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:19,608 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 02:38:19,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551403163] [2020-10-16 02:38:19,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724724569] [2020-10-16 02:38:19,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 02:38:19,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 02:38:19,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:38:19,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 02:38:19,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 02:38:19,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:19,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 02:38:19,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157295757] [2020-10-16 02:38:19,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 02:38:19,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:19,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 02:38:19,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 02:38:19,691 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 83 [2020-10-16 02:38:19,691 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 311 flow. Second operand 8 states. [2020-10-16 02:38:19,691 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:19,692 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 83 [2020-10-16 02:38:19,692 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:19,739 INFO L129 PetriNetUnfolder]: 31/150 cut-off events. [2020-10-16 02:38:19,740 INFO L130 PetriNetUnfolder]: For 898/963 co-relation queries the response was YES. [2020-10-16 02:38:19,741 INFO L80 FinitePrefix]: Finished finitePrefix Result has 553 conditions, 150 events. 31/150 cut-off events. For 898/963 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 525 event pairs, 12 based on Foata normal form. 18/165 useless extension candidates. Maximal degree in co-relation 492. Up to 44 conditions per place. [2020-10-16 02:38:19,742 INFO L132 encePairwiseOnDemand]: 79/83 looper letters, 7 selfloop transitions, 16 changer transitions 0/51 dead transitions. [2020-10-16 02:38:19,742 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 367 flow [2020-10-16 02:38:19,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 02:38:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-16 02:38:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 477 transitions. [2020-10-16 02:38:19,744 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.8209982788296041 [2020-10-16 02:38:19,744 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 477 transitions. [2020-10-16 02:38:19,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 477 transitions. [2020-10-16 02:38:19,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:19,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 477 transitions. [2020-10-16 02:38:19,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 8 states. [2020-10-16 02:38:19,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 8 states. [2020-10-16 02:38:19,747 INFO L81 ComplementDD]: Finished complementDD. Result 8 states. [2020-10-16 02:38:19,748 INFO L185 Difference]: Start difference. First operand has 55 places, 46 transitions, 311 flow. Second operand 7 states and 477 transitions. [2020-10-16 02:38:19,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 367 flow [2020-10-16 02:38:19,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 51 transitions, 335 flow, removed 5 selfloop flow, removed 4 redundant places. [2020-10-16 02:38:19,752 INFO L241 Difference]: Finished difference. Result has 59 places, 47 transitions, 326 flow [2020-10-16 02:38:19,752 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=326, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2020-10-16 02:38:19,752 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 35 predicate places. [2020-10-16 02:38:19,753 INFO L481 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 326 flow [2020-10-16 02:38:19,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 02:38:19,753 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:19,753 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:19,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-16 02:38:19,969 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:19,970 INFO L82 PathProgramCache]: Analyzing trace with hash 395498883, now seen corresponding path program 7 times [2020-10-16 02:38:19,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:19,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758582983] [2020-10-16 02:38:19,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:38:20,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758582983] [2020-10-16 02:38:20,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959982210] [2020-10-16 02:38:20,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 02:38:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:20,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 02:38:20,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-16 02:38:20,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:20,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-16 02:38:20,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21978906] [2020-10-16 02:38:20,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 02:38:20,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:20,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 02:38:20,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-16 02:38:20,313 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 83 [2020-10-16 02:38:20,314 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 326 flow. Second operand 21 states. [2020-10-16 02:38:20,314 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:20,314 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 83 [2020-10-16 02:38:20,314 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:21,062 INFO L129 PetriNetUnfolder]: 479/1297 cut-off events. [2020-10-16 02:38:21,062 INFO L130 PetriNetUnfolder]: For 4996/5031 co-relation queries the response was YES. [2020-10-16 02:38:21,069 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5273 conditions, 1297 events. 479/1297 cut-off events. For 4996/5031 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8298 event pairs, 73 based on Foata normal form. 13/1295 useless extension candidates. Maximal degree in co-relation 4860. Up to 405 conditions per place. [2020-10-16 02:38:21,078 INFO L132 encePairwiseOnDemand]: 77/83 looper letters, 100 selfloop transitions, 77 changer transitions 53/240 dead transitions. [2020-10-16 02:38:21,078 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 240 transitions, 2402 flow [2020-10-16 02:38:21,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-16 02:38:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-16 02:38:21,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1473 transitions. [2020-10-16 02:38:21,086 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6825764596848934 [2020-10-16 02:38:21,086 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1473 transitions. [2020-10-16 02:38:21,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1473 transitions. [2020-10-16 02:38:21,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:21,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1473 transitions. [2020-10-16 02:38:21,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 27 states. [2020-10-16 02:38:21,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 27 states. [2020-10-16 02:38:21,098 INFO L81 ComplementDD]: Finished complementDD. Result 27 states. [2020-10-16 02:38:21,098 INFO L185 Difference]: Start difference. First operand has 59 places, 47 transitions, 326 flow. Second operand 26 states and 1473 transitions. [2020-10-16 02:38:21,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 240 transitions, 2402 flow [2020-10-16 02:38:21,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 240 transitions, 2003 flow, removed 126 selfloop flow, removed 4 redundant places. [2020-10-16 02:38:21,126 INFO L241 Difference]: Finished difference. Result has 96 places, 134 transitions, 1258 flow [2020-10-16 02:38:21,127 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1258, PETRI_PLACES=96, PETRI_TRANSITIONS=134} [2020-10-16 02:38:21,128 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 72 predicate places. [2020-10-16 02:38:21,128 INFO L481 AbstractCegarLoop]: Abstraction has has 96 places, 134 transitions, 1258 flow [2020-10-16 02:38:21,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 02:38:21,128 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:21,129 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:21,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-10-16 02:38:21,345 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:21,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:21,345 INFO L82 PathProgramCache]: Analyzing trace with hash -725904403, now seen corresponding path program 8 times [2020-10-16 02:38:21,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:21,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521276077] [2020-10-16 02:38:21,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:21,483 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-16 02:38:21,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521276077] [2020-10-16 02:38:21,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297063987] [2020-10-16 02:38:21,484 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 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 02:38:21,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 02:38:21,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:38:21,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 02:38:21,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-16 02:38:21,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:21,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-16 02:38:21,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026328857] [2020-10-16 02:38:21,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 02:38:21,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:21,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 02:38:21,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 02:38:21,598 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 83 [2020-10-16 02:38:21,599 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 134 transitions, 1258 flow. Second operand 17 states. [2020-10-16 02:38:21,599 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:21,599 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 83 [2020-10-16 02:38:21,599 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:22,246 INFO L129 PetriNetUnfolder]: 559/1519 cut-off events. [2020-10-16 02:38:22,246 INFO L130 PetriNetUnfolder]: For 11652/11692 co-relation queries the response was YES. [2020-10-16 02:38:22,257 INFO L80 FinitePrefix]: Finished finitePrefix Result has 8430 conditions, 1519 events. 559/1519 cut-off events. For 11652/11692 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 10340 event pairs, 80 based on Foata normal form. 11/1520 useless extension candidates. Maximal degree in co-relation 8376. Up to 496 conditions per place. [2020-10-16 02:38:22,266 INFO L132 encePairwiseOnDemand]: 77/83 looper letters, 84 selfloop transitions, 73 changer transitions 96/263 dead transitions. [2020-10-16 02:38:22,266 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 263 transitions, 3204 flow [2020-10-16 02:38:22,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-16 02:38:22,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-16 02:38:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1077 transitions. [2020-10-16 02:38:22,270 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6829422954977806 [2020-10-16 02:38:22,271 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1077 transitions. [2020-10-16 02:38:22,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1077 transitions. [2020-10-16 02:38:22,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:22,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1077 transitions. [2020-10-16 02:38:22,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-16 02:38:22,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-16 02:38:22,277 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-16 02:38:22,277 INFO L185 Difference]: Start difference. First operand has 96 places, 134 transitions, 1258 flow. Second operand 19 states and 1077 transitions. [2020-10-16 02:38:22,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 263 transitions, 3204 flow [2020-10-16 02:38:22,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 263 transitions, 2896 flow, removed 154 selfloop flow, removed 7 redundant places. [2020-10-16 02:38:22,312 INFO L241 Difference]: Finished difference. Result has 106 places, 134 transitions, 1440 flow [2020-10-16 02:38:22,313 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1440, PETRI_PLACES=106, PETRI_TRANSITIONS=134} [2020-10-16 02:38:22,313 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 82 predicate places. [2020-10-16 02:38:22,313 INFO L481 AbstractCegarLoop]: Abstraction has has 106 places, 134 transitions, 1440 flow [2020-10-16 02:38:22,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 02:38:22,314 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:22,314 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:22,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:38:22,528 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:22,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:22,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2007575449, now seen corresponding path program 9 times [2020-10-16 02:38:22,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:22,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429155296] [2020-10-16 02:38:22,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:22,638 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-16 02:38:22,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429155296] [2020-10-16 02:38:22,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890131595] [2020-10-16 02:38:22,639 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 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 02:38:22,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 02:38:22,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:38:22,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 02:38:22,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-16 02:38:22,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:22,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-10-16 02:38:22,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190341460] [2020-10-16 02:38:22,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 02:38:22,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:22,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 02:38:22,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 02:38:22,739 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 83 [2020-10-16 02:38:22,740 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 134 transitions, 1440 flow. Second operand 15 states. [2020-10-16 02:38:22,740 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:22,740 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 83 [2020-10-16 02:38:22,740 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:23,378 INFO L129 PetriNetUnfolder]: 615/1684 cut-off events. [2020-10-16 02:38:23,378 INFO L130 PetriNetUnfolder]: For 11840/11876 co-relation queries the response was YES. [2020-10-16 02:38:23,396 INFO L80 FinitePrefix]: Finished finitePrefix Result has 9631 conditions, 1684 events. 615/1684 cut-off events. For 11840/11876 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 11873 event pairs, 82 based on Foata normal form. 12/1686 useless extension candidates. Maximal degree in co-relation 9578. Up to 569 conditions per place. [2020-10-16 02:38:23,407 INFO L132 encePairwiseOnDemand]: 77/83 looper letters, 77 selfloop transitions, 69 changer transitions 123/279 dead transitions. [2020-10-16 02:38:23,408 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 279 transitions, 3704 flow [2020-10-16 02:38:23,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 02:38:23,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 02:38:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 906 transitions. [2020-10-16 02:38:23,412 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6822289156626506 [2020-10-16 02:38:23,412 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 906 transitions. [2020-10-16 02:38:23,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 906 transitions. [2020-10-16 02:38:23,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:23,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 906 transitions. [2020-10-16 02:38:23,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 02:38:23,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 02:38:23,418 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 02:38:23,418 INFO L185 Difference]: Start difference. First operand has 106 places, 134 transitions, 1440 flow. Second operand 16 states and 906 transitions. [2020-10-16 02:38:23,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 279 transitions, 3704 flow [2020-10-16 02:38:23,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 279 transitions, 3348 flow, removed 58 selfloop flow, removed 15 redundant places. [2020-10-16 02:38:23,503 INFO L241 Difference]: Finished difference. Result has 106 places, 133 transitions, 1503 flow [2020-10-16 02:38:23,504 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1503, PETRI_PLACES=106, PETRI_TRANSITIONS=133} [2020-10-16 02:38:23,504 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 82 predicate places. [2020-10-16 02:38:23,504 INFO L481 AbstractCegarLoop]: Abstraction has has 106 places, 133 transitions, 1503 flow [2020-10-16 02:38:23,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 02:38:23,504 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:23,505 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:23,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:38:23,718 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:23,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:23,719 INFO L82 PathProgramCache]: Analyzing trace with hash 240769191, now seen corresponding path program 10 times [2020-10-16 02:38:23,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:23,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149277308] [2020-10-16 02:38:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-16 02:38:23,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149277308] [2020-10-16 02:38:23,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758450076] [2020-10-16 02:38:23,815 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:38:23,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 02:38:23,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:38:23,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 02:38:23,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-16 02:38:23,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:23,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-16 02:38:23,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211455364] [2020-10-16 02:38:23,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 02:38:23,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:23,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 02:38:23,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 02:38:23,911 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 83 [2020-10-16 02:38:23,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 133 transitions, 1503 flow. Second operand 13 states. [2020-10-16 02:38:23,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:23,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 83 [2020-10-16 02:38:23,912 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:24,556 INFO L129 PetriNetUnfolder]: 696/1896 cut-off events. [2020-10-16 02:38:24,556 INFO L130 PetriNetUnfolder]: For 17614/17670 co-relation queries the response was YES. [2020-10-16 02:38:24,569 INFO L80 FinitePrefix]: Finished finitePrefix Result has 12059 conditions, 1896 events. 696/1896 cut-off events. For 17614/17670 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 13710 event pairs, 81 based on Foata normal form. 16/1904 useless extension candidates. Maximal degree in co-relation 12003. Up to 627 conditions per place. [2020-10-16 02:38:24,578 INFO L132 encePairwiseOnDemand]: 77/83 looper letters, 72 selfloop transitions, 65 changer transitions 161/308 dead transitions. [2020-10-16 02:38:24,579 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 308 transitions, 4396 flow [2020-10-16 02:38:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 02:38:24,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-16 02:38:24,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 958 transitions. [2020-10-16 02:38:24,581 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6789510985116939 [2020-10-16 02:38:24,581 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 958 transitions. [2020-10-16 02:38:24,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 958 transitions. [2020-10-16 02:38:24,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:24,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 958 transitions. [2020-10-16 02:38:24,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-16 02:38:24,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-16 02:38:24,587 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-16 02:38:24,587 INFO L185 Difference]: Start difference. First operand has 106 places, 133 transitions, 1503 flow. Second operand 17 states and 958 transitions. [2020-10-16 02:38:24,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 308 transitions, 4396 flow [2020-10-16 02:38:24,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 308 transitions, 3740 flow, removed 167 selfloop flow, removed 15 redundant places. [2020-10-16 02:38:24,659 INFO L241 Difference]: Finished difference. Result has 108 places, 131 transitions, 1523 flow [2020-10-16 02:38:24,660 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1523, PETRI_PLACES=108, PETRI_TRANSITIONS=131} [2020-10-16 02:38:24,660 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 84 predicate places. [2020-10-16 02:38:24,660 INFO L481 AbstractCegarLoop]: Abstraction has has 108 places, 131 transitions, 1523 flow [2020-10-16 02:38:24,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 02:38:24,660 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:24,660 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:24,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-16 02:38:24,874 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:24,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:24,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1183481319, now seen corresponding path program 11 times [2020-10-16 02:38:24,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:24,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603325330] [2020-10-16 02:38:24,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 02:38:24,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603325330] [2020-10-16 02:38:24,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049481433] [2020-10-16 02:38:24,970 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:38:25,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-16 02:38:25,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:38:25,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 02:38:25,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-16 02:38:25,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:25,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-10-16 02:38:25,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069491924] [2020-10-16 02:38:25,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 02:38:25,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:25,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 02:38:25,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-16 02:38:25,073 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 83 [2020-10-16 02:38:25,074 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 131 transitions, 1523 flow. Second operand 15 states. [2020-10-16 02:38:25,074 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:25,074 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 83 [2020-10-16 02:38:25,074 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:25,607 INFO L129 PetriNetUnfolder]: 600/1639 cut-off events. [2020-10-16 02:38:25,608 INFO L130 PetriNetUnfolder]: For 18659/18708 co-relation queries the response was YES. [2020-10-16 02:38:25,621 INFO L80 FinitePrefix]: Finished finitePrefix Result has 11169 conditions, 1639 events. 600/1639 cut-off events. For 18659/18708 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 11412 event pairs, 50 based on Foata normal form. 13/1641 useless extension candidates. Maximal degree in co-relation 11112. Up to 530 conditions per place. [2020-10-16 02:38:25,631 INFO L132 encePairwiseOnDemand]: 77/83 looper letters, 97 selfloop transitions, 70 changer transitions 138/315 dead transitions. [2020-10-16 02:38:25,631 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 315 transitions, 4580 flow [2020-10-16 02:38:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-16 02:38:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-16 02:38:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 958 transitions. [2020-10-16 02:38:25,633 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6789510985116939 [2020-10-16 02:38:25,633 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 958 transitions. [2020-10-16 02:38:25,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 958 transitions. [2020-10-16 02:38:25,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:25,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 958 transitions. [2020-10-16 02:38:25,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 18 states. [2020-10-16 02:38:25,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 18 states. [2020-10-16 02:38:25,638 INFO L81 ComplementDD]: Finished complementDD. Result 18 states. [2020-10-16 02:38:25,638 INFO L185 Difference]: Start difference. First operand has 108 places, 131 transitions, 1523 flow. Second operand 17 states and 958 transitions. [2020-10-16 02:38:25,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 315 transitions, 4580 flow [2020-10-16 02:38:25,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 315 transitions, 3771 flow, removed 267 selfloop flow, removed 14 redundant places. [2020-10-16 02:38:25,696 INFO L241 Difference]: Finished difference. Result has 112 places, 127 transitions, 1620 flow [2020-10-16 02:38:25,697 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1620, PETRI_PLACES=112, PETRI_TRANSITIONS=127} [2020-10-16 02:38:25,697 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 88 predicate places. [2020-10-16 02:38:25,697 INFO L481 AbstractCegarLoop]: Abstraction has has 112 places, 127 transitions, 1620 flow [2020-10-16 02:38:25,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 02:38:25,698 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:25,698 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:25,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-16 02:38:25,913 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:25,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:25,914 INFO L82 PathProgramCache]: Analyzing trace with hash 596135601, now seen corresponding path program 12 times [2020-10-16 02:38:25,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:25,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294443886] [2020-10-16 02:38:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-16 02:38:26,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294443886] [2020-10-16 02:38:26,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107273984] [2020-10-16 02:38:26,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:38:26,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 02:38:26,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:38:26,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 02:38:26,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-16 02:38:26,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:26,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-16 02:38:26,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841449754] [2020-10-16 02:38:26,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 02:38:26,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:26,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 02:38:26,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 02:38:26,103 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 83 [2020-10-16 02:38:26,103 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 127 transitions, 1620 flow. Second operand 13 states. [2020-10-16 02:38:26,103 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:26,103 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 83 [2020-10-16 02:38:26,103 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:26,451 INFO L129 PetriNetUnfolder]: 499/1387 cut-off events. [2020-10-16 02:38:26,452 INFO L130 PetriNetUnfolder]: For 19380/19426 co-relation queries the response was YES. [2020-10-16 02:38:26,464 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10448 conditions, 1387 events. 499/1387 cut-off events. For 19380/19426 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 9340 event pairs, 31 based on Foata normal form. 17/1400 useless extension candidates. Maximal degree in co-relation 10110. Up to 567 conditions per place. [2020-10-16 02:38:26,473 INFO L132 encePairwiseOnDemand]: 77/83 looper letters, 71 selfloop transitions, 50 changer transitions 90/221 dead transitions. [2020-10-16 02:38:26,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 221 transitions, 3416 flow [2020-10-16 02:38:26,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-16 02:38:26,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-16 02:38:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 732 transitions. [2020-10-16 02:38:26,476 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6784059314179796 [2020-10-16 02:38:26,476 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 732 transitions. [2020-10-16 02:38:26,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 732 transitions. [2020-10-16 02:38:26,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:26,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 732 transitions. [2020-10-16 02:38:26,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 14 states. [2020-10-16 02:38:26,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 14 states. [2020-10-16 02:38:26,479 INFO L81 ComplementDD]: Finished complementDD. Result 14 states. [2020-10-16 02:38:26,479 INFO L185 Difference]: Start difference. First operand has 112 places, 127 transitions, 1620 flow. Second operand 13 states and 732 transitions. [2020-10-16 02:38:26,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 221 transitions, 3416 flow [2020-10-16 02:38:26,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 221 transitions, 2925 flow, removed 231 selfloop flow, removed 7 redundant places. [2020-10-16 02:38:26,556 INFO L241 Difference]: Finished difference. Result has 116 places, 107 transitions, 1294 flow [2020-10-16 02:38:26,556 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1294, PETRI_PLACES=116, PETRI_TRANSITIONS=107} [2020-10-16 02:38:26,557 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 92 predicate places. [2020-10-16 02:38:26,557 INFO L481 AbstractCegarLoop]: Abstraction has has 116 places, 107 transitions, 1294 flow [2020-10-16 02:38:26,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 02:38:26,557 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:26,557 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:26,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 02:38:26,772 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:26,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:26,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1860149855, now seen corresponding path program 13 times [2020-10-16 02:38:26,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:26,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863335201] [2020-10-16 02:38:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 02:38:26,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863335201] [2020-10-16 02:38:26,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250114156] [2020-10-16 02:38:26,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:38:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:26,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-16 02:38:26,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 02:38:26,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:26,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-10-16 02:38:26,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731665804] [2020-10-16 02:38:26,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-16 02:38:26,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:26,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-16 02:38:26,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-16 02:38:26,911 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 83 [2020-10-16 02:38:26,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 107 transitions, 1294 flow. Second operand 11 states. [2020-10-16 02:38:26,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:26,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 83 [2020-10-16 02:38:26,912 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:27,361 INFO L129 PetriNetUnfolder]: 539/1498 cut-off events. [2020-10-16 02:38:27,361 INFO L130 PetriNetUnfolder]: For 16296/16362 co-relation queries the response was YES. [2020-10-16 02:38:27,371 INFO L80 FinitePrefix]: Finished finitePrefix Result has 10219 conditions, 1498 events. 539/1498 cut-off events. For 16296/16362 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10412 event pairs, 44 based on Foata normal form. 20/1510 useless extension candidates. Maximal degree in co-relation 10164. Up to 622 conditions per place. [2020-10-16 02:38:27,392 INFO L132 encePairwiseOnDemand]: 77/83 looper letters, 75 selfloop transitions, 120 changer transitions 17/222 dead transitions. [2020-10-16 02:38:27,392 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 222 transitions, 3361 flow [2020-10-16 02:38:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 02:38:27,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 02:38:27,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 884 transitions. [2020-10-16 02:38:27,399 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6656626506024096 [2020-10-16 02:38:27,400 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 884 transitions. [2020-10-16 02:38:27,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 884 transitions. [2020-10-16 02:38:27,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:27,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 884 transitions. [2020-10-16 02:38:27,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 02:38:27,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 02:38:27,403 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 02:38:27,403 INFO L185 Difference]: Start difference. First operand has 116 places, 107 transitions, 1294 flow. Second operand 16 states and 884 transitions. [2020-10-16 02:38:27,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 222 transitions, 3361 flow [2020-10-16 02:38:27,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 222 transitions, 2986 flow, removed 92 selfloop flow, removed 19 redundant places. [2020-10-16 02:38:27,446 INFO L241 Difference]: Finished difference. Result has 114 places, 179 transitions, 2535 flow [2020-10-16 02:38:27,446 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2535, PETRI_PLACES=114, PETRI_TRANSITIONS=179} [2020-10-16 02:38:27,447 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 90 predicate places. [2020-10-16 02:38:27,447 INFO L481 AbstractCegarLoop]: Abstraction has has 114 places, 179 transitions, 2535 flow [2020-10-16 02:38:27,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-16 02:38:27,447 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-16 02:38:27,447 INFO L255 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 02:38:27,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:38:27,661 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 02:38:27,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 02:38:27,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1315023419, now seen corresponding path program 14 times [2020-10-16 02:38:27,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 02:38:27,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917391749] [2020-10-16 02:38:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 02:38:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 02:38:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 02:38:27,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917391749] [2020-10-16 02:38:27,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430784045] [2020-10-16 02:38:27,744 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 02:38:27,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 02:38:27,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 02:38:27,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-16 02:38:27,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 02:38:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-16 02:38:27,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 02:38:27,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-10-16 02:38:27,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369711434] [2020-10-16 02:38:27,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-16 02:38:27,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 02:38:27,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-16 02:38:27,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-16 02:38:27,835 INFO L507 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 83 [2020-10-16 02:38:27,835 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 179 transitions, 2535 flow. Second operand 13 states. [2020-10-16 02:38:27,835 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-16 02:38:27,836 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 83 [2020-10-16 02:38:27,836 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-16 02:38:28,322 INFO L129 PetriNetUnfolder]: 700/1888 cut-off events. [2020-10-16 02:38:28,323 INFO L130 PetriNetUnfolder]: For 21593/21713 co-relation queries the response was YES. [2020-10-16 02:38:28,332 INFO L80 FinitePrefix]: Finished finitePrefix Result has 13316 conditions, 1888 events. 700/1888 cut-off events. For 21593/21713 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 13839 event pairs, 47 based on Foata normal form. 39/1918 useless extension candidates. Maximal degree in co-relation 13153. Up to 795 conditions per place. [2020-10-16 02:38:28,335 INFO L132 encePairwiseOnDemand]: 77/83 looper letters, 0 selfloop transitions, 0 changer transitions 262/262 dead transitions. [2020-10-16 02:38:28,335 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 262 transitions, 4413 flow [2020-10-16 02:38:28,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-16 02:38:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-16 02:38:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 885 transitions. [2020-10-16 02:38:28,337 INFO L552 CegarLoopForPetriNet]: DFA transition density 0.6664156626506024 [2020-10-16 02:38:28,337 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 885 transitions. [2020-10-16 02:38:28,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 885 transitions. [2020-10-16 02:38:28,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-16 02:38:28,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 885 transitions. [2020-10-16 02:38:28,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 17 states. [2020-10-16 02:38:28,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 17 states. [2020-10-16 02:38:28,341 INFO L81 ComplementDD]: Finished complementDD. Result 17 states. [2020-10-16 02:38:28,341 INFO L185 Difference]: Start difference. First operand has 114 places, 179 transitions, 2535 flow. Second operand 16 states and 885 transitions. [2020-10-16 02:38:28,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 262 transitions, 4413 flow [2020-10-16 02:38:28,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 262 transitions, 3885 flow, removed 223 selfloop flow, removed 6 redundant places. [2020-10-16 02:38:28,393 INFO L241 Difference]: Finished difference. Result has 122 places, 0 transitions, 0 flow [2020-10-16 02:38:28,393 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=83, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=122, PETRI_TRANSITIONS=0} [2020-10-16 02:38:28,394 INFO L342 CegarLoopForPetriNet]: 24 programPoint places, 98 predicate places. [2020-10-16 02:38:28,394 INFO L481 AbstractCegarLoop]: Abstraction has has 122 places, 0 transitions, 0 flow [2020-10-16 02:38:28,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-16 02:38:28,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 02:38:28,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:38:28 BasicIcfg [2020-10-16 02:38:28,600 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 02:38:28,602 INFO L168 Benchmark]: Toolchain (without parser) took 14026.04 ms. Allocated memory was 250.6 MB in the beginning and 529.0 MB in the end (delta: 278.4 MB). Free memory was 203.2 MB in the beginning and 232.8 MB in the end (delta: -29.6 MB). Peak memory consumption was 248.8 MB. Max. memory is 14.2 GB. [2020-10-16 02:38:28,603 INFO L168 Benchmark]: CDTParser took 0.43 ms. Allocated memory is still 250.6 MB. Free memory is still 224.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 02:38:28,604 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.48 ms. Allocated memory was 250.6 MB in the beginning and 312.0 MB in the end (delta: 61.3 MB). Free memory was 203.2 MB in the beginning and 287.0 MB in the end (delta: -83.8 MB). Peak memory consumption was 27.4 MB. Max. memory is 14.2 GB. [2020-10-16 02:38:28,604 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.35 ms. Allocated memory is still 312.0 MB. Free memory was 287.0 MB in the beginning and 284.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-16 02:38:28,605 INFO L168 Benchmark]: Boogie Preprocessor took 23.33 ms. Allocated memory is still 312.0 MB. Free memory is still 284.5 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-16 02:38:28,605 INFO L168 Benchmark]: RCFGBuilder took 338.82 ms. Allocated memory is still 312.0 MB. Free memory was 284.5 MB in the beginning and 265.8 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 14.2 GB. [2020-10-16 02:38:28,606 INFO L168 Benchmark]: TraceAbstraction took 13286.65 ms. Allocated memory was 312.0 MB in the beginning and 529.0 MB in the end (delta: 217.1 MB). Free memory was 265.8 MB in the beginning and 232.8 MB in the end (delta: 33.0 MB). Peak memory consumption was 250.0 MB. Max. memory is 14.2 GB. [2020-10-16 02:38:28,609 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43 ms. Allocated memory is still 250.6 MB. Free memory is still 224.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 333.48 ms. Allocated memory was 250.6 MB in the beginning and 312.0 MB in the end (delta: 61.3 MB). Free memory was 203.2 MB in the beginning and 287.0 MB in the end (delta: -83.8 MB). Peak memory consumption was 27.4 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 37.35 ms. Allocated memory is still 312.0 MB. Free memory was 287.0 MB in the beginning and 284.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 23.33 ms. Allocated memory is still 312.0 MB. Free memory is still 284.5 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 338.82 ms. Allocated memory is still 312.0 MB. Free memory was 284.5 MB in the beginning and 265.8 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 14.2 GB. * TraceAbstraction took 13286.65 ms. Allocated memory was 312.0 MB in the beginning and 529.0 MB in the end (delta: 217.1 MB). Free memory was 265.8 MB in the beginning and 232.8 MB in the end (delta: 33.0 MB). Peak memory consumption was 250.0 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 354 VarBasedMoverChecksPositive, 9 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 9 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 66 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 0.7s, 47 PlacesBefore, 24 PlacesAfterwards, 46 TransitionsBefore, 21 TransitionsAfterwards, 528 CoEnabledTransitionPairs, 5 FixpointIterations, 9 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 2 ChoiceCompositions, 27 TotalNumberOfCompositions, 972 MoverChecksTotal - PositiveResult [Line: 46]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 13.1s, OverallIterations: 18, TraceHistogramMax: 5, AutomataDifference: 5.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.8s, HoareTripleCheckerStatistics: 183 SDtfs, 369 SDslu, 421 SDs, 0 SdLazy, 1719 SolverSat, 268 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 697 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2535occurred in iteration=17, 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, 0.5s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 987 NumberOfCodeBlocks, 983 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 954 ConstructedInterpolants, 0 QuantifiedInterpolants, 79280 SizeOfPredicates, 85 NumberOfNonLiveVariables, 1486 ConjunctsInSsa, 127 ConjunctsInUnsatCore, 33 InterpolantComputations, 3 PerfectInterpolantSequences, 550/1086 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...